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Tadano H, Kohno H, Takeuchi H, Kubo T. Unique spatially and temporary-regulated/sex-specific expression of a long ncRNA, Nb-1, suggesting its pleiotropic functions associated with honey bee lifecycle. Sci Rep 2024; 14:8701. [PMID: 38622193 PMCID: PMC11018616 DOI: 10.1038/s41598-024-59494-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Accepted: 04/11/2024] [Indexed: 04/17/2024] Open
Abstract
Honey bees are social insects, and each colony member has unique morphological and physiological traits associated with their social tasks. Previously, we identified a long non-coding RNA from honey bees, termed Nb-1, whose expression in the brain decreases associated with the age-polyethism of workers and is detected in some neurosecretory cells and octopaminergic neurons, suggesting its role in the regulation of worker labor transition. Herein, we investigated its spatially and temporary-regulated/sex-specific expression. Nb-1 was expressed as an abundant maternal RNA during oogenesis and embryogenesis in both sexes. In addition, Nb-1 was expressed preferentially in the proliferating neuroblasts of the mushroom bodies (a higher-order center of the insect brain) in the pupal brains, suggesting its role in embryogenesis and mushroom body development. On the contrary, Nb-1 was expressed in a drone-specific manner in the pupal and adult retina, suggesting its role in the drone visual development and/or sense. Subcellular localization of Nb-1 in the brain during development differed depending on the cell type. Considering that Nb-1 is conserved only in Apidae, our findings suggest that Nb-1 potentially has pleiotropic functions in the expression of multiple developmental, behavioral, and physiological traits, which are closely associated with the honey bee lifecycle.
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Affiliation(s)
- Hiroto Tadano
- Department of Biological Sciences, Graduate School of Science, The University of Tokyo, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Hiroki Kohno
- Department of Biological Sciences, Graduate School of Science, The University of Tokyo, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Hideaki Takeuchi
- Department of Biological Sciences, Graduate School of Science, The University of Tokyo, Bunkyo-ku, Tokyo, 113-0033, Japan
- Department of Integrative Life Sciences, Graduate School of Life Sciences, Tohoku University, Sendai, Miyagi, 980-8577, Japan
| | - Takeo Kubo
- Department of Biological Sciences, Graduate School of Science, The University of Tokyo, Bunkyo-ku, Tokyo, 113-0033, Japan.
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2
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Zhu Y, Shan W, Lian Z, Liu J, Zhang Y, He H. Effects of impregnation sequence on the NH 3-SCR activity and hydrothermal stability of a Ce-Nb/SnO 2 catalyst. J Environ Sci (China) 2024; 138:450-457. [PMID: 38135410 DOI: 10.1016/j.jes.2023.04.032] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2023] [Revised: 04/26/2023] [Accepted: 04/26/2023] [Indexed: 12/24/2023]
Abstract
Hydrothermal stability is crucial for the practical application of deNOx catalyst on diesel vehicles, for the selective catalytic reduction of NOx with NH3 (NH3-SCR). SnO2-based materials possess superior hydrothermal stability, which is attractive for the development of NH3-SCR catalyst. In this work, a series of Ce-Nb/SnO2 catalysts, with Ce and Nb loading on SnO2 support, were prepared by impregnation method. It was found that, the NH3-SCR activities and hydrothermal stabilities of the Ce-Nb/SnO2 catalysts significantly varied with the impregnation sequences, and the Ce-Nb(f)/SnO2 catalyst that firstly impregnated Nb and then impregnated Ce exhibited the best performance. The characterization results revealed that Ce-Nb(f)/SnO2 possessed appropriate acidity and redox capability. Furthermore, the strong synergistic effect between Nb and Sn species stabilized the structure and maintained the dispersion of acid sites. This study may provide a new understanding for the effect of impregnation sequence on activity and hydrothermal stability and a new environmental-friendly NH3-SCR catalyst with potential applications for NOx removal from diesel and hydrogen-fueled engines.
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Affiliation(s)
- Ying Zhu
- Center for Excellence in Regional Atmospheric Environment and Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Wenpo Shan
- Center for Excellence in Regional Atmospheric Environment and Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China; Zhejiang Key Laboratory of Urban Environmental Processes and Pollution Control, Ningbo Urban Environment Observation and Research Station, Institute of Urban Environment, Chinese Academy of Sciences, Ningbo 315800, China.
| | - Zhihua Lian
- Center for Excellence in Regional Atmospheric Environment and Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
| | - Jingjing Liu
- State Key Joint Laboratory of Environment Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Yan Zhang
- Center for Excellence in Regional Atmospheric Environment and Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China; Zhejiang Key Laboratory of Urban Environmental Processes and Pollution Control, Ningbo Urban Environment Observation and Research Station, Institute of Urban Environment, Chinese Academy of Sciences, Ningbo 315800, China
| | - Hong He
- Center for Excellence in Regional Atmospheric Environment and Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China; State Key Joint Laboratory of Environment Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China.
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Kim HY, Cho JH, Yoon HI, Lee JH, Choi S, Han JS, Yeo ISL. Topographical and crystalline change on surface by sandblasting improve flexural and shear bond strength of niobia-modified yttria-stabilized tetragonal zirconia polycrystal. Dent Mater J 2024; 43:216-226. [PMID: 38417860 DOI: 10.4012/dmj.2023-225] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/01/2024]
Abstract
This study aimed to investigate the effects of sandblasting on the physical properties and bond strength of two types of translucent zirconia: niobium-oxide-containing yttria-stabilized tetragonal zirconia polycrystals ((Y, Nb)-TZP) and 5 mol% yttria-partially stabilized zirconia (5Y-PSZ). Fully sintered disc specimens were either sandblasted with 125 µm alumina particles or left as-sintered. Surface roughness, crystal phase compositions, and surface morphology were explored. Biaxial flexural strength (n=10) and shear bond strength (SBS) (n=12) were evaluated, including thermocycling conditions. Results indicated a decrease in flexural strength of 5Y-PSZ from 601 to 303 MPa upon sandblasting, while (Y, Nb)-TZP improved from 458 to 544 MPa. Both materials significantly increased SBS after sandblasting (p<0.001). After thermocycling, (Y, Nb)-TZP maintained superior SBS (14.3 MPa) compared to 5Y-PSZ (11.3 MPa) (p<0.001). The study concludes that (Y, Nb)-TZP is preferable for sandblasting applications, particularly for achieving durable bonding without compromising flexural strength.
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Affiliation(s)
- Ha-Young Kim
- Department of Prosthodontics, Seoul National University School of Dentistry
| | - Jun-Ho Cho
- Department of Prosthodontics, School of Dentistry and Dental Research Institute, Seoul National University
| | - Hyung-In Yoon
- Department of Prosthodontics, School of Dentistry and Dental Research Institute, Seoul National University
| | - Jae-Hyun Lee
- Department of Prosthodontics, School of Dentistry and Dental Research Institute, Seoul National University
| | - Sunyoung Choi
- Department of Prosthodontics, One-Stop Specialty Center, Seoul National University Dental Hospital
| | - Jung-Suk Han
- Department of Prosthodontics, Seoul National University School of Dentistry
| | - In-Sung Luke Yeo
- Department of Prosthodontics, School of Dentistry and Dental Research Institute, Seoul National University
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Obeid AT, Nascimento TRDL, Agassi AC, Almeida AZF, Guedes APDMA, Alves JM, Bombonatti JFS, Velo MMDAC. Niobium oxyhydroxide as a bioactive agent and reinforcement to a high-viscosity bulk-fill resin composite. J Appl Oral Sci 2024; 32:e20230278. [PMID: 38537028 PMCID: PMC11018299 DOI: 10.1590/1678-7757-2023-0278] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2023] [Revised: 12/10/2023] [Accepted: 01/17/2024] [Indexed: 04/17/2024] Open
Abstract
OBJECTIVE The present in vitro study incorporated niobium oxyhydroxide fillers into an experimental high-viscosity bulk-fill resin composite to improve its mechanical performance and provide it a bioactive potential. METHODOLOGY Scanning electron microscopy synthesized and characterized 0.5% niobium oxyhydroxide fillers, demonstrating a homogeneous morphology that represented a reinforcement for the feature. Fillers were weighed, gradually added to the experimental resin composite, and homogenized for one minute, forming three groups: BF (experimental high-viscosity bulk-fill resin composite; control), BF0.5 (experimental high-viscosity bulk-fill resin composite modified with 0.5% niobium oxyhydroxide fillers), and BFC (commercial bulk-fill resin composite Beautifil Bulk U, Shofu; positive control). In total, 10 specimens/groups (8 × 2 × 2 mm) underwent flexural strength (FS) tests in a universal testing machine (Instron) (500N). Resin composites were also assessed for Knoop hardness (KH), depth of cure (DoC), degree of conversion (DC), elastic modulus (E), and degree of color change (ΔE). The bioactive potential of the developed resin composite was evaluated after immersing the specimens into a simulated body fluid in vitro solution and assessing them using a Fourier-transformed infrared spectroscope with an attenuated total reflectance accessory. One-way ANOVA, followed by the Tukey's test (p<0.05), determined FS, DC, KH, and ΔE. For DoC, ANOVA was performed, which demonstrated no significant difference between groups (p<0.05). CONCLUSIONS The high-viscosity bulk-fill resin composite with 0.5% niobium oxyhydroxide fillers showed promising outcomes as reinforcement agents and performed well for bioactive potential, although less predictable than the commercial resin composite with Giomer technology.
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Affiliation(s)
- Alyssa Teixeira Obeid
- Universidade de São Paulo, Faculdade de Odontologia de Bauru, Departamento de Dentística, Endodontia e Materiais odontológicos, Bauru, Brasil
| | - Tatiana Rita de Lima Nascimento
- Universidade Federal da Paraíba, Cidade Universitária, Departamento de Química, Centro de Pesquisa de Combustíveis e Materiais (NPE-LACOM), João Pessoa, Brasil
| | - Ana Carolina Agassi
- Universidade de São Paulo, Faculdade de Odontologia de Bauru, Departamento de Dentística, Endodontia e Materiais odontológicos, Bauru, Brasil
| | - Ana Zélia Falcão Almeida
- Universidade Federal da Paraíba, Cidade Universitária, Departamento de Química, Centro de Pesquisa de Combustíveis e Materiais (NPE-LACOM), João Pessoa, Brasil
| | - Ana Paula de Melo Alves Guedes
- Universidade Federal da Paraíba, Cidade Universitária, Departamento de Química, Centro de Pesquisa de Combustíveis e Materiais (NPE-LACOM), João Pessoa, Brasil
| | - João Marco Alves
- Universidade de São Paulo, Faculdade de Odontologia de Bauru, Departamento de Dentística, Endodontia e Materiais odontológicos, Bauru, Brasil
| | - Juliana Fraga Soares Bombonatti
- Universidade de São Paulo, Faculdade de Odontologia de Bauru, Departamento de Dentística, Endodontia e Materiais odontológicos, Bauru, Brasil
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Feng H, Ge T, Guo X, Wang B, Zhang Y, Chen Z, Zhu S, Zhang K, Sun W, Huang C, Yuan Y, Wang C. Integrated lithium niobate microwave photonic processing engine. Nature 2024; 627:80-87. [PMID: 38418888 DOI: 10.1038/s41586-024-07078-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2023] [Accepted: 01/16/2024] [Indexed: 03/02/2024]
Abstract
Integrated microwave photonics (MWP) is an intriguing technology for the generation, transmission and manipulation of microwave signals in chip-scale optical systems1,2. In particular, ultrafast processing of analogue signals in the optical domain with high fidelity and low latency could enable a variety of applications such as MWP filters3-5, microwave signal processing6-9 and image recognition10,11. An ideal integrated MWP processing platform should have both an efficient and high-speed electro-optic modulation block to faithfully perform microwave-optic conversion at low power and also a low-loss functional photonic network to implement various signal-processing tasks. Moreover, large-scale, low-cost manufacturability is required to monolithically integrate the two building blocks on the same chip. Here we demonstrate such an integrated MWP processing engine based on a 4 inch wafer-scale thin-film lithium niobate platform. It can perform multipurpose tasks with processing bandwidths of up to 67 GHz at complementary metal-oxide-semiconductor (CMOS)-compatible voltages. We achieve ultrafast analogue computation, namely temporal integration and differentiation, at sampling rates of up to 256 giga samples per second, and deploy these functions to showcase three proof-of-concept applications: solving ordinary differential equations, generating ultra-wideband signals and detecting edges in images. We further leverage the image edge detector to realize a photonic-assisted image segmentation model that can effectively outline the boundaries of melanoma lesion in medical diagnostic images. Our ultrafast lithium niobate MWP engine could provide compact, low-latency and cost-effective solutions for future wireless communications, high-resolution radar and photonic artificial intelligence.
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Affiliation(s)
- Hanke Feng
- Department of Electrical Engineering & State Key Laboratory of Terahertz and Millimeter Waves, City University of Hong Kong, Kowloon, China
| | - Tong Ge
- Department of Electrical Engineering & State Key Laboratory of Terahertz and Millimeter Waves, City University of Hong Kong, Kowloon, China
| | - Xiaoqing Guo
- Department of Electrical Engineering & State Key Laboratory of Terahertz and Millimeter Waves, City University of Hong Kong, Kowloon, China
- Department of Engineering Science, University of Oxford, Oxford, UK
| | - Benshan Wang
- Department of Electronic Engineering, Chinese University of Hong Kong, Shatin, China
| | - Yiwen Zhang
- Department of Electrical Engineering & State Key Laboratory of Terahertz and Millimeter Waves, City University of Hong Kong, Kowloon, China
| | - Zhaoxi Chen
- Department of Electrical Engineering & State Key Laboratory of Terahertz and Millimeter Waves, City University of Hong Kong, Kowloon, China
| | - Sha Zhu
- Department of Electrical Engineering & State Key Laboratory of Terahertz and Millimeter Waves, City University of Hong Kong, Kowloon, China
- College of Microelectronics, Faculty of Information Technology, Beijing University of Technology, Beijing, China
| | - Ke Zhang
- Department of Electrical Engineering & State Key Laboratory of Terahertz and Millimeter Waves, City University of Hong Kong, Kowloon, China
| | - Wenzhao Sun
- Department of Electrical Engineering & State Key Laboratory of Terahertz and Millimeter Waves, City University of Hong Kong, Kowloon, China
- City University of Hong Kong (Dongguan), Dongguan, China
- Center of Information and Communication Technology, City University of Hong Kong Shenzhen Research Institute, Shenzhen, China
| | - Chaoran Huang
- Department of Electronic Engineering, Chinese University of Hong Kong, Shatin, China
| | - Yixuan Yuan
- Department of Electrical Engineering & State Key Laboratory of Terahertz and Millimeter Waves, City University of Hong Kong, Kowloon, China
- Department of Electronic Engineering, Chinese University of Hong Kong, Shatin, China
| | - Cheng Wang
- Department of Electrical Engineering & State Key Laboratory of Terahertz and Millimeter Waves, City University of Hong Kong, Kowloon, China.
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Sellin ML, Seyfarth-Sehlke A, Aziz M, Fabry C, Wenke K, Høl PJ, Rios-Mondragon I, Cimpan MR, Frank M, Bader R, Jonitz-Heincke A. Isolation of TiNbN wear particles from a coated metal-on-metal bearing: Morphological characterization and in vitro evaluation of cytotoxicity in human osteoblasts. J Biomed Mater Res B Appl Biomater 2024; 112:e35357. [PMID: 38247242 DOI: 10.1002/jbm.b.35357] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2023] [Revised: 10/18/2023] [Accepted: 11/15/2023] [Indexed: 01/23/2024]
Abstract
To improve the wear resistance of articulating metallic joint endoprostheses, the surfaces can be coated with titanium niobium nitride (TiNbN). Under poor tribological conditions or malalignment, wear can occur on these implant surfaces in situ. This study investigated the biological response of human osteoblasts to wear particles generated from TiNbN-coated hip implants. Abrasive particles were generated in a hip simulator according to ISO 14242-1/-2 and extracted with Proteinase K. Particle characteristics were evaluated by electron microscopy and energy dispersive x-ray spectroscopy (EDS), inductively coupled plasma mass spectrometry (ICP-MS) and dynamic light scattering (DLS) measurements. Human osteoblasts were exposed to different particle dilutions (1:20, 1:50, and 1:100), and cell viability and gene expression levels of osteogenic markers and inflammatory mediators were analyzed after 4 and 7 days. Using ICP-MS, EDS, and DLS measurements, ~70% of the particles were identified as TiNbN, ranging from 39 to 94 nm. The particles exhibited a flat and subangular morphology. Exposure to particles did not influence cell viability and osteoblastic differentiation capacity. Protein levels of collagen type 1, osteoprotegerin, and receptor activator of nuclear factor κB ligand were almost unaffected. Moreover, the pro-inflammatory response via interleukins 6 and 8 was minor induced after particle contact. A high number of TiNbN wear particles only slightly affected osteoblasts' differentiation ability and inflammatory response compared to metallic particles. Nevertheless, further studies should investigate the role of these particles in peri-implant bone tissue, especially concerning other cell types.
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Affiliation(s)
- Marie-Luise Sellin
- Department of Orthopaedics, Biomechanics and Implant Technology Research Laboratory, Rostock University Medical Center, Rostock, Germany
| | - Anika Seyfarth-Sehlke
- Department of Orthopaedics, Biomechanics and Implant Technology Research Laboratory, Rostock University Medical Center, Rostock, Germany
| | - Mahammad Aziz
- Department of Orthopaedics, Biomechanics and Implant Technology Research Laboratory, Rostock University Medical Center, Rostock, Germany
| | | | | | - Paul Johan Høl
- Department of Orthopaedic Surgery, Biomatlab, Haukeland University Hospital, Bergen, Norway
- Department of Clinical Medicine, Biomaterials, University of Bergen, Bergen, Norway
| | - Ivan Rios-Mondragon
- Department for Clinical Dentistry Biomaterials, University of Bergen, Bergen, Norway
| | - Mihaela Roxana Cimpan
- Department for Clinical Dentistry Biomaterials, University of Bergen, Bergen, Norway
| | - Marcus Frank
- Medical Biology and Electron Microscopy Center, Rostock University Medical Center, Rostock, Germany
- Department Life, Light and Matter, University of Rostock, Rostock, Germany
| | - Rainer Bader
- Department of Orthopaedics, Biomechanics and Implant Technology Research Laboratory, Rostock University Medical Center, Rostock, Germany
- Department Life, Light and Matter, University of Rostock, Rostock, Germany
| | - Anika Jonitz-Heincke
- Department of Orthopaedics, Biomechanics and Implant Technology Research Laboratory, Rostock University Medical Center, Rostock, Germany
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Kong Y, Li Z, Zhang L, Song J, Liu Q, Zhu Y, Li N, Song L, Li X. A novel Nb 2C MXene based aptasensor for rapid and sensitive multi-mode detection of AFB 1. Biosens Bioelectron 2023; 242:115725. [PMID: 37837938 DOI: 10.1016/j.bios.2023.115725] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2023] [Revised: 09/23/2023] [Accepted: 10/01/2023] [Indexed: 10/16/2023]
Abstract
Rapid and accurate on-site detection of aflatoxin B1 (AFB1) is of great significance for ensuring food safety. This work developed a dual mode aptasensor and a dual channel artificial neural network (ANN) intelligent sensor detection platform for simple and convenient quantitative detection of AFB1 in food. This sensor was prepared by encoding manganese ion (Mn2+) mediated surface concave niobium carbide MXene nanomaterials (Nb2C-MNs) using fluorescent group labeled aptamers (ssDNA-FAM). Mn2+-mediated Nb2C-MNs exhibited better peroxidase-like and fluorescence quenching properties. Moreover, ssDNA-FAM as a fluorescent probe for the sensor also significantly enhanced the enzyme activity of Nb2C-MNs. When AFB1 existed, ssDNA-FAM preferentially bonded to AFB1, resulting in fluorescence signal recovery and colorimetric signal weakening. Consequently, the multimodal biosensor could achieve fluorescence/colorimetric detection without the need for material and reagent replacement. In on-site detection, both ratio fluorescence and colorimetric signals could be collected using smartphones and analyzed and modeled on the developed ANN platform, achieving visual intelligent sensing. This multimodal biosensor had a detection line as low as 0.0950 ng/mL under optimal conditions, and also had the advantages of simple operation, fast and sensitive, and high specificity, which can meet the real-time on-site detection needs of AFB1 in remote areas.
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Affiliation(s)
- Yiqian Kong
- School of Food Engineering, Ludong University, Yantai, Shandong 264025, PR China
| | - Zongyi Li
- School of Management, Harbin Institute of Technology, Harbin, Heilongjiang 150001, PR China
| | - Lili Zhang
- School of Food Engineering, Ludong University, Yantai, Shandong 264025, PR China
| | - Juncheng Song
- School of Food Engineering, Ludong University, Yantai, Shandong 264025, PR China
| | - Qi Liu
- School of Food Engineering, Ludong University, Yantai, Shandong 264025, PR China
| | - Yinghua Zhu
- School of Information and Electrical Engineering, Ludong University, Yantai, Shandong 264025, PR China
| | - Na Li
- School of Food Engineering, Ludong University, Yantai, Shandong 264025, PR China
| | - Lili Song
- Shandong Jinsheng Grain, Oil and Food Co., Ltd, Linyi, Shandong 276629, PR China
| | - Xiangyang Li
- School of Food Engineering, Ludong University, Yantai, Shandong 264025, PR China.
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Kumari N, Samdarshi SK, Verma R, Gaurav K, Bhattacharyya AS, Mohanty K, Deshpande U. Superior functionality of niobium pentoxide nano-rod/tripod photocatalyst synthesized using polyethyleneimine as a soft template for the abatement of methylene blue under UV and visible irradiation. Environ Sci Pollut Res Int 2023; 30:122458-122469. [PMID: 37973783 DOI: 10.1007/s11356-023-31001-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2023] [Accepted: 11/06/2023] [Indexed: 11/19/2023]
Abstract
Polyethyleneimine (PEI) capping agent-cum-template-mediated synthesis of niobium oxide nanoparticles is reported to explore its impact on the resultant morphology, porosity, crystallinity, phase complexation, and thus on the photocatalytic activity. The resultant niobium oxides calcined at 800°C and 1000°C crystallized into highly ordered nano-rod/tripod nanostructure with inter-rod angle <120° having orthorhombic phase and heavily agglomerated rod-like nanostructures having monoclinic crystal phase, respectively. Contrary to the expectations, the nano-rod/tripods showed superior photocatalytic degradation kinetics and high adsorption of methylene blue dye in the hydrocolloid than formerly reported monoclinic nanoparticles. The best adsorption capability and photocatalytic activity are observed for the sample calcined at 800°C, resulting in a combined degradation efficiency of 98.8% of methylene blue dye. The adsorption characteristics, stability of the hydrocolloid system, the existence of oxygen vacancies, and the distinct morphology of the photocatalytic nano-rod/tripods are mainly responsible for this behavior. The process and the performance of unique nanostructure over others presents a superior alternative.
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Affiliation(s)
- Neha Kumari
- Centre of Excellence in Green and Efficient Energy Technology, Central University of Jharkhand, Ranchi, Jharkhand, 835205, India
- Department of Energy Engineering, Central University of Jharkhand, Ranchi, Jharkhand, 835205, India
| | - Sanjoy Kumar Samdarshi
- Centre of Excellence in Green and Efficient Energy Technology, Central University of Jharkhand, Ranchi, Jharkhand, 835205, India.
- Department of Energy Engineering, Central University of Jharkhand, Ranchi, Jharkhand, 835205, India.
| | - Ranjana Verma
- Department of Physics, Institute of Sciences, Banaras Hindu University, Varanasi, Uttar Pradesh, 221005, India
| | - Kumar Gaurav
- Centre of Excellence in Green and Efficient Energy Technology, Central University of Jharkhand, Ranchi, Jharkhand, 835205, India
- Department of Energy Engineering, Central University of Jharkhand, Ranchi, Jharkhand, 835205, India
| | - Arnab S Bhattacharyya
- Department of Energy Engineering, Central University of Jharkhand, Ranchi, Jharkhand, 835205, India
- Department of Nanotechnology, Central University of Jharkhand, Ranchi, Jharkhand, 835205, India
| | - Kaustubha Mohanty
- Department of Chemical Engineering, Indian Institute of Technology, Guwahati, Assam, 781039, India
| | - Uday Deshpande
- University Grant Commission Department of Atomic Energy, Consortium for Scientific Research (UGC-DAE CSR), Indore, Madhya Pradesh, 452001, India
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Ji K, Zhou X, Zhong J, Bi X, Zhang L, Guo J, Ren D. Insights into Nb doping effects on the catalytic activity and SO 2 tolerance of Mn-Cu/BCN catalyst for low-temperature NH 3-SCR reaction. Chemosphere 2023; 341:140006. [PMID: 37683948 DOI: 10.1016/j.chemosphere.2023.140006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Revised: 08/02/2023] [Accepted: 08/26/2023] [Indexed: 09/10/2023]
Abstract
Biochar-based supported denitration catalysts have shown tremendous potential in reducing NOx, while improving low-temperature NH3-SCR catalytic activity and SO2 tolerance still faces great challenges. In this work, Mn7-Cu3/BCN and Mn7-Cu3-Nbx/BCN catalysts were prepared by one-step wet impregnation. The enhanced effect of Nb doping on the catalytic performance and SO2 tolerance over the Mn7-Cu3/BCN catalyst was evaluated in the temperature range of 75-275 °C. The denitrification activity test showed that the introduction of an appropriate amount of Nb increased the catalytic activity and N2 selectivity of the catalyst. The NO conversion of Mn7-Cu3-Nb0.05/BCN with an optimum doping ratio of 0.05 wt% Nb was higher than 94% at 150-275 °C. The characterization results indicated that the introduction of Nb enhanced the interaction between the active components MnOx and CuOx, accelerated the electron transfer between elements, and thus improved the Mn4+/Mnn+ and Oα/(Oα+Oβ+Oγ) proportions and redox performance. On the other hand, Nb modification increased the number of weakly acidic sites, which was beneficial for the adsorption and activation of the reducing agent NH3 under low-temperature conditions. Meanwhile, Nb could significantly improve the SO2 poisoning resistance of the Mn7-Cu3/BCN-S catalyst when SO2 was added to the reaction system. The NO conversion of Mn7-Cu3-Nb0.05/BCN remained above 75% after a 13.5 h reaction under 100 ppm SO2 and 5 vol% H2O at 225 °C. By combining experimental characterization results with DFT calculation results, we effectively confirmed that Mn7-Cu3-Nb0.05/BCN had good sulfur resistance, mainly because Nb could effectively inhibit the formation of manganese sulfate and promote the decomposition of ammonium bisulfate.
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Affiliation(s)
- Ke Ji
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, 266033, China
| | - Xiaolu Zhou
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, 266033, China
| | - Jinqin Zhong
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, 266033, China
| | - Xuejun Bi
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, 266033, China
| | - Linyang Zhang
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, 266033, China
| | - Jianxiang Guo
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, 266033, China.
| | - Dongdong Ren
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, 266033, China.
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10
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Liu S, Huang Y, Li S, Lin Q, Wang J, Xie S, Liu F, Xu H, Chen Y. Unique κ-Ce 2Zr 2O 8 Superstructure Promoting the NO x Adsorption-Selective Catalytic Reduction (AdSCR) Performance of the WO 3/CeZrO x Catalyst. Environ Sci Technol 2023; 57:16685-16694. [PMID: 37864569 DOI: 10.1021/acs.est.3c05384] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2023]
Abstract
Selective catalytic reduction of NOx by NH3 (NH3-SCR) for diesel emission control at low temperatures is still a great challenge due to the limit of the urea injection threshold and inferior SCR activity of state-of-the-art catalyst systems below 200 °C. Fabricating bifunctional catalysts with both low temperature NOx adsorption-storage capacity and medium-high temperature NOx reduction activity is an effective strategy to solve the issues mentioned above but is rarely investigated. Herein, the WO3/Ce0.68Zr0.32Ox (W/CZ) catalyst containing the κ-Ce2Zr2O8 pyrochlore structure was successfully developed by a simple H2 reduction method, not only showing superior NOx adsorption-storage ability below 180 °C but also exhibiting excellent NH3-SCR activity above 180 °C. The presence of the pyrochlore structure effectively increased the oxygen vacancies on the κ-Ce2Zr2O8-containing W/CZ catalyst with enhanced redox property, which significantly promoted the NOx adsorption-storage as active nitrate species below 180 °C. Upon NH3 introduction above 180 °C, the κ-Ce2Zr2O8-containing W/CZ catalyst showed greatly improved NOx reduction performance, suggesting that the pyrochlore structure played a vital role in improving the NOx adsorption-selective catalytic reduction (AdSCR) performance. This work provides a new perspective for designing bifunctional CeZrOx-based catalysts to efficiently control the NOx emissions from diesel engines during the cold-start process.
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Affiliation(s)
- Shuang Liu
- Institute of New Energy and Low-Carbon Technology, Sichuan University, Chengdu 610207, Sichuan, China
- Sichuan Provincial Environmental Protection Environmental Catalytic Materials Engineering Technology Center, College of Chemistry, Sichuan University, Chengdu 610064, Sichuan, China
| | - Yan Huang
- Institute of New Energy and Low-Carbon Technology, Sichuan University, Chengdu 610207, Sichuan, China
| | - Shanshan Li
- Sichuan Provincial Environmental Protection Environmental Catalytic Materials Engineering Technology Center, College of Chemistry, Sichuan University, Chengdu 610064, Sichuan, China
| | - Qingjin Lin
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute, Sichuan University, Chengdu, 610064 Sichuan, China
| | - Jianli Wang
- Sichuan Provincial Environmental Protection Environmental Catalytic Materials Engineering Technology Center, College of Chemistry, Sichuan University, Chengdu 610064, Sichuan, China
| | - Shaohua Xie
- Department of Civil, Environmental, and Construction Engineering, Catalysis Cluster for Renewable Energy and Chemical Transformations (REACT), Nano Science Technology Center (NSTC), University of Central Florida, Orlando, Florida 32816, United States
| | - Fudong Liu
- Department of Civil, Environmental, and Construction Engineering, Catalysis Cluster for Renewable Energy and Chemical Transformations (REACT), Nano Science Technology Center (NSTC), University of Central Florida, Orlando, Florida 32816, United States
| | - Haidi Xu
- Institute of New Energy and Low-Carbon Technology, Sichuan University, Chengdu 610207, Sichuan, China
- Sichuan Provincial Environmental Protection Environmental Catalytic Materials Engineering Technology Center, College of Chemistry, Sichuan University, Chengdu 610064, Sichuan, China
| | - Yaoqiang Chen
- Institute of New Energy and Low-Carbon Technology, Sichuan University, Chengdu 610207, Sichuan, China
- Sichuan Provincial Environmental Protection Environmental Catalytic Materials Engineering Technology Center, College of Chemistry, Sichuan University, Chengdu 610064, Sichuan, China
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11
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Wojciechowska A, Jakubczak M, Moszczyńska D, Wójcik A, Prenger K, Naguib M, Jastrzębska AM. Engineering the surface of Nb n+1C nT x MXenes to versatile bio-activity towards microorganisms. Biomater Adv 2023; 153:213581. [PMID: 37572598 DOI: 10.1016/j.bioadv.2023.213581] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2023] [Revised: 07/17/2023] [Accepted: 08/04/2023] [Indexed: 08/14/2023]
Abstract
Two-dimensional (2D) transition metal carbides/nitrides (MXenes) are potential antibacterial agents. However, their activity against microorganisms is not fully understood. It could relate to MXenes' surface which further influences their biocidal action. Herein, we report no continuous biocidal activity for delaminated 2D niobium-based MXenes (Nbn+1XnTx) such as Nb2CTx and Nb4C3Tx prepared with HF/TMAOH protocol. Biocidal activity towards Bacillus subtilis and Staphylococcus aureus microorganisms was achieved by surface-functionalization with lysozyme macromolecule. MXenes' engineering with lysozyme changed MXene's surface charge from negative into positive thus enabling the elimination of bacteria cells during 48 h of incubation. In contrast, Nb4C3Tx functionalized with collagen stimulated the growth of Bacillus subtilis by 225 %, showing MXene's biocompatibility towards this particular strain. Altogether, our results show that MXenes are incredibly bio-tunable. Opposing bio-effects such as antimicrobial or growth-stimulating can be achieved towards various microorganisms with rational surface engineering.
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Affiliation(s)
- Anita Wojciechowska
- Warsaw University of Technology, Faculty of Materials Science and Engineering, 02-507 Warsaw, Woloska 141, Poland.
| | - Michał Jakubczak
- Warsaw University of Technology, Faculty of Materials Science and Engineering, 02-507 Warsaw, Woloska 141, Poland.
| | - Dorota Moszczyńska
- Warsaw University of Technology, Faculty of Materials Science and Engineering, 02-507 Warsaw, Woloska 141, Poland.
| | - Anna Wójcik
- Polish Academy of Sciences, Institute of Metallurgy and Materials Science, W. Reymonta 25, 30-059 Cracow, Poland.
| | - Kaitlyn Prenger
- INM - Leibniz Institute for New Materials, Campus D22, 66123 Saarbrücken, Germany.
| | - Michael Naguib
- Tulane University, Department of Physics and Engineering Physics, New Orleans, LA 70118, USA.
| | - Agnieszka Maria Jastrzębska
- Warsaw University of Technology, Faculty of Materials Science and Engineering, 02-507 Warsaw, Woloska 141, Poland.
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12
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Nippes RP, Gomes AD, Macruz PD, de Souza M. Photocatalytic removal of 17β-estradiol from water using a novel bimetallic NiCu/Nb 2O 5 catalyst. Environ Sci Pollut Res Int 2023; 30:103731-103742. [PMID: 37688700 DOI: 10.1007/s11356-023-29727-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2023] [Accepted: 09/01/2023] [Indexed: 09/11/2023]
Abstract
The development of effective photocatalytic materials is essential for removing emerging pollutants from aqueous media, such as the hormone 17β-estradiol (E2). In this study, a novel photocatalyst based on niobium pentoxide (Nb2O5) functionalized with nickel (Ni) and copper (Cu) was synthesized for E2 removal. The NiCu/Nb2O5 photocatalyst was prepared using a facile wet impregnation method and characterized by various techniques. The incorporation of Ni and Cu into Nb2O5 reduced the band gap energy from 3.3 to 2.8 eV, enabling efficient utilization of visible light. Moreover, NiCu/Nb2O5 exhibited the highest E2 removal efficiency (82%) under UV-A-assisted conditions at a concentration of 1.5 g L-1. The reaction kinetics were found to follow a second-order model with a rate constant of k = 0.0020 L g-1 min-1, and a plausible reaction mechanism was proposed. Through the study of radical elimination, it was proven that the radical oxidation reaction mechanism predominated in the reaction. The results of the toxicity assays, combined with the TOC parameter, demonstrated the efficacy of photocatalytic degradation in reducing E2. These findings demonstrate the great potential of the NiCu/Nb2O5 photocatalyst for removing persistent pollutants.
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Affiliation(s)
- Ramiro Picoli Nippes
- Chemical Engineering Department of Maringa State University, Maringa, PR, Av. Colombo Zone 7, Brazil, 579087020-900.
| | - Aline Domingues Gomes
- Chemical Engineering Department of Maringa State University, Maringa, PR, Av. Colombo Zone 7, Brazil, 579087020-900
| | - Paula Derksen Macruz
- Chemical Engineering Department of Maringa State University, Maringa, PR, Av. Colombo Zone 7, Brazil, 579087020-900
| | - Marcos de Souza
- Chemical Engineering Department of Maringa State University, Maringa, PR, Av. Colombo Zone 7, Brazil, 579087020-900
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13
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Safavi MS, Khalil-Allafi J, Restivo E, Ghalandarzadeh A, Hosseini M, Dacarro G, Malavasi L, Milella A, Listorti A, Visai L. Enhanced in vitro immersion behavior and antibacterial activity of NiTi orthopedic biomaterial by HAp-Nb 2O 5 composite deposits. Sci Rep 2023; 13:16045. [PMID: 37749260 PMCID: PMC10520115 DOI: 10.1038/s41598-023-43393-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2023] [Accepted: 09/22/2023] [Indexed: 09/27/2023] Open
Abstract
NiTi is a class of metallic biomaterials, benefit from superelastic behavior, high biocompatibility, and favorable mechanical properties close to that of bone. However, the Ni ion leaching, poor bioactivity, and antibacterial activity limit its clinical applications. In this study, HAp-Nb2O5 composite layers were PC electrodeposited from aqueous electrolytes containing different concentrations of the Nb2O5 particles, i.e., 0-1 g/L, to evaluate the influence of the applied surface engineering strategy on in vitro immersion behavior, Ni2+ ion leaching level, and antibacterial activity of the bare NiTi. Surface characteristics of the electrodeposited layers were analyzed using SEM, TEM, XPS, and AFM. The immersion behavior of the samples was comprehensively investigated through SBF and long-term PBS soaking. Gram-negative Escherichia coli (E. coli) and Gram-positive Staphylococcus aureus (S. aureus) infective reference bacteria were employed to address the antibacterial activity of the samples. The results illustrated that the included particles led to more compact and smoother layers. Unlike bare NiTi, composite layers stimulated apatite formation upon immersion in both SBF and PBS media. The concentration of the released Ni2+ ion from the composite layer, containing 0.50 g/L Nb2O5 was ≈ 60% less than that of bare NiTi within 30 days of immersion in the corrosive PBS solution. The Nb2O5-reinforced layers exhibited high anti-adhesive activity against both types of pathogenic bacteria. The hybrid metallic-ceramic system comprising HAp-Nb2O5-coated NiTi offers the prospect of a potential solution for clinical challenges facing the orthopedic application of NiTi.
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Affiliation(s)
- Mir Saman Safavi
- Research Center for Advanced Materials, Faculty of Materials Engineering, Sahand University of Technology, P.O. Box: 51335-1996, Tabriz, Iran.
- Molecular Medicine Department (DMM), Center for Health Technologies (CHT), UdR INSTM, University of Pavia, Viale Taramelli 3/B, 27100, Pavia, Italy.
| | - Jafar Khalil-Allafi
- Research Center for Advanced Materials, Faculty of Materials Engineering, Sahand University of Technology, P.O. Box: 51335-1996, Tabriz, Iran.
| | - Elisa Restivo
- Molecular Medicine Department (DMM), Center for Health Technologies (CHT), UdR INSTM, University of Pavia, Viale Taramelli 3/B, 27100, Pavia, Italy
- Medicina Clinica-Specialistica, UOR5 Laboratorio di Nanotecnologie, ICS Maugeri, IRCCS, 27100, Pavia, Italy
| | - Arash Ghalandarzadeh
- School of Metallurgy and Materials Engineering, Iran University of Science and Technology, Tehran, Iran
| | - Milad Hosseini
- Research Center for Advanced Materials, Faculty of Materials Engineering, Sahand University of Technology, P.O. Box: 51335-1996, Tabriz, Iran
| | - Giacomo Dacarro
- Department of Chemistry, Physical Chemistry section, and CHT, University of Pavia, Viale Taramelli 12, 27100, Pavia, Italy
| | - Lorenzo Malavasi
- Department of Chemistry and INSTM, University of Pavia, Viale Taramelli 12, 27100, Pavia, Italy
| | - Antonella Milella
- Department of Chemistry, University of Bari Aldo Moro, Via Orabona 4, 70125, Bari, Italy
| | - Andrea Listorti
- Department of Chemistry, University of Bari Aldo Moro, Via Orabona 4, 70125, Bari, Italy
| | - Livia Visai
- Molecular Medicine Department (DMM), Center for Health Technologies (CHT), UdR INSTM, University of Pavia, Viale Taramelli 3/B, 27100, Pavia, Italy.
- Medicina Clinica-Specialistica, UOR5 Laboratorio di Nanotecnologie, ICS Maugeri, IRCCS, 27100, Pavia, Italy.
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14
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Yang XM, Lin XD, Shi W, Xie SX, Huang XN, Yin SH, Jiang XB, Hammock BD, Xu ZP, Lu XL. Nanobody-based bispecific T-cell engager (Nb-BiTE): a new platform for enhanced T-cell immunotherapy. Signal Transduct Target Ther 2023; 8:328. [PMID: 37661200 PMCID: PMC10475457 DOI: 10.1038/s41392-023-01523-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2023] [Revised: 05/22/2023] [Accepted: 05/31/2023] [Indexed: 09/05/2023] Open
Affiliation(s)
- Xiao-Mei Yang
- Guangxi Key Laboratory of Nanobody Research, Guangxi Nanobody Engineering Research Center, College of Stomatology, Hospital of Stomatology, Laboratory Animal Center, School of Basic Medical Science, Pharmaceutical College, Guangxi Medical University, Nanning City, Guangxi, 530021, P. R. China
| | - Xuan-Dong Lin
- Guangxi Key Laboratory of Nanobody Research, Guangxi Nanobody Engineering Research Center, College of Stomatology, Hospital of Stomatology, Laboratory Animal Center, School of Basic Medical Science, Pharmaceutical College, Guangxi Medical University, Nanning City, Guangxi, 530021, P. R. China
| | - Wei Shi
- Guangxi Key Laboratory of Nanobody Research, Guangxi Nanobody Engineering Research Center, College of Stomatology, Hospital of Stomatology, Laboratory Animal Center, School of Basic Medical Science, Pharmaceutical College, Guangxi Medical University, Nanning City, Guangxi, 530021, P. R. China
| | - Shen-Xia Xie
- Guangxi Key Laboratory of Nanobody Research, Guangxi Nanobody Engineering Research Center, College of Stomatology, Hospital of Stomatology, Laboratory Animal Center, School of Basic Medical Science, Pharmaceutical College, Guangxi Medical University, Nanning City, Guangxi, 530021, P. R. China
| | - Xia-Ning Huang
- Guangxi Key Laboratory of Nanobody Research, Guangxi Nanobody Engineering Research Center, College of Stomatology, Hospital of Stomatology, Laboratory Animal Center, School of Basic Medical Science, Pharmaceutical College, Guangxi Medical University, Nanning City, Guangxi, 530021, P. R. China
| | - Shi-Hua Yin
- Guangxi Key Laboratory of Nanobody Research, Guangxi Nanobody Engineering Research Center, College of Stomatology, Hospital of Stomatology, Laboratory Animal Center, School of Basic Medical Science, Pharmaceutical College, Guangxi Medical University, Nanning City, Guangxi, 530021, P. R. China
| | - Xiao-Bing Jiang
- Department of Neurosurgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan City, Hubei, 430022, P. R. China
| | - Bruce D Hammock
- Department of Entomology and Nematology, UCD Comprehensive Cancer Center, University of California, Davis, CA, 95616, USA
| | - Zhi Ping Xu
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Brisbane, QLD, 4072, Australia.
- Institute of Biomedical Health Technology and Engineering and Institute of Systems and Physical Biology, Shenzhen Bay Laboratory, Shenzhen, 518107, P. R. China.
| | - Xiao-Ling Lu
- Guangxi Key Laboratory of Nanobody Research, Guangxi Nanobody Engineering Research Center, College of Stomatology, Hospital of Stomatology, Laboratory Animal Center, School of Basic Medical Science, Pharmaceutical College, Guangxi Medical University, Nanning City, Guangxi, 530021, P. R. China.
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15
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Souza LVS, Pavanello L, Picolo MZD, Kury M, Matos ICRT, Cogo-Müller K, Esteban Florez FL, Cavalli V. Mechanical and antibacterial properties of an experimental flowable composite containing Nb 2O 5 and NF_TiO 2 nanoparticles. J Mech Behav Biomed Mater 2023; 143:105919. [PMID: 37279637 DOI: 10.1016/j.jmbbm.2023.105919] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2023] [Revised: 05/15/2023] [Accepted: 05/16/2023] [Indexed: 06/08/2023]
Abstract
This study developed an experimental flowable composite incorporated with niobium pentoxide (Nb2O5) combined or not with titanium dioxide co-doped with fluorine and nitrogen (NF_TiO2) and evaluated the mechanical and antibacterial properties. The experimental flowable composite (TEGDMA + BisGMA 1:1 + 60%wt - inorganic filler - borosilicate 0.7 μm) was formulated according to the type and concentration of Nb2O5 and NF_TiO2 (0.5, 1, 1.5 and 2 wt%) or NF_TiO2 + Nb2O5 (0.25, 0.5, 0.75 and 1 wt% - 1:1). The control groups were formed by the experimental composite without the incorporation of Nb2O5 and/or NF_TiO2 (GC-E) and by a commercial flowable composite (GC). The characterization of the surface of the composite and its particles was carried out using scanning electron microscopy (SEM) and energy dispersive x-rays (EDX). Specimens were manufactured and subjected to mechanical tests of flexural strength (FS) (n = 12), flexural modulus (FM) (n = 12), roughness (Ra) (n = 10), microhardness (n = 10), and contact angle (n = 10); and, to evaluate the antibacterial activity, they were submitted to tests of biofilm formation against S. mutans (CFU/mL) (n = 5), biofilm biomass by dry weight (n = 5) and confocal laser microscopy (%LIVE/DEAD) (n = 5). Data were submitted to one-way ANOVA and Tukey's post-hoc and, those that were not homoscedastic, but with normality, were submitted to Welch's ANOVA and Games-Howell's post-hoc. Dunnet's test was used to compare the controls with the other experimental groups (α = 5). The Nb2O5 particles had an average size of 32.4 μm and the nanoparticles (NPs) of NF_TiO2, 10 nm. EDX analysis identified isolated peaks of N, F, Ti, and Nb confirming the presence of these particles in the resin matrix. The 1.5% NF_TiO2 group had a higher FS and FM than the controls (p < 0.05). GC showed higher microhardness between groups (p < 0.05). There was no difference between the experimental groups regarding contact angle and roughness (p > 0.05), except for GC, which had the highest Ra values and the lowest contact angle between groups (p < 0.05). Composites containing 0.5%, 1%, 1.5%, and 2% Nb2O5, 1%, 1.5%, and 2% NF_TiO2 and 2% Nb2O5 + NF_TiO2 showed lower biofilm formation (p < 0.05), lower total biofilm biomass (p < 0.05), and a higher percentage of dead cells (44%, 52%, 52%, 79%, 42% 43%, 62%, 65%, respectively) than GC and GC-E (5% and 1%, respectively). It is concluded that the incorporation of 1.5% NF_TiO2 promoted a greater FS and FM among the experimental composites and that the addition of Nb2O5 particles (0.5%, 1%, 1.5%, and 2%), NF_TiO2 (1%, 1.5% and 2%) and the combination Nb2O5 + NF_TiO2 (2%) showed significant antibacterial effects.
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Affiliation(s)
| | - Larissa Pavanello
- Department of Biosciences, University of Campinas, Piracicaba Dental School, Piracicaba, SP, Brazil
| | - Mayara Zaghi Dal Picolo
- Department of Restorative Dentistry, University of Campinas - Piracicaba Dental School, Piracicaba, SP, Brazil
| | - Matheus Kury
- Department of Restorative Dentistry, University of Campinas - Piracicaba Dental School, Piracicaba, SP, Brazil
| | | | - Karina Cogo-Müller
- Faculty of Pharmaceutical Sciences, University of Campinas, Campinas, SP, Brazil
| | - Fernando Luis Esteban Florez
- Division of Dental Biomaterials, University of Oklahoma Health Sciences Center, Oklahoma City, OK, United States
| | - Vanessa Cavalli
- Department of Restorative Dentistry, University of Campinas - Piracicaba Dental School, Piracicaba, SP, Brazil.
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16
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Guo W, Liang L, Zhao Y, Zhao C, Lu X, Cao Y, Gao F. In-situ growth of SnO 2 nanoparticles on Nb 2CT x nanosheets as highly sensitive electrochemical sensing platform for organophosphorus pesticide detection. Colloids Surf B Biointerfaces 2023; 224:113238. [PMID: 36870270 DOI: 10.1016/j.colsurfb.2023.113238] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2022] [Revised: 02/23/2023] [Accepted: 02/28/2023] [Indexed: 03/05/2023]
Abstract
In this study, the SnO2/Nb2CTx MXene nanocomposite containing 0D/2D interfaces was prepared by situ growth strategy of one-step hydrothermal method. A SnO2/Nb2CTx MXene based acetylcholinesterase (AChE) biosensor was constructed for pesticide detection. Highly conductive Nb2CTx MXene, acting as substrate material, restrained the agglomeration of nanoparticles (NPs) and accelerated electron migration due to the confinement effect and well-known accordion-like layered structure. In addition, SnO2 anchored on both sides of the Nb2CTx MXene nanosheets effectively provided a large surface area, abundant surface groups and active sites, which preserved numbers of electrons at the interface of the heterojunction. The SnO2/Nb2CTx MXene hybrids with outstanding conductivity, good biocompatibility and structural stability were beneficial for AChE immobilization. Under the optimized conditions, as-fabricated electrochemical biosensor demonstrated superior performance with linear detection range of 5.1 × 10-14 - 5.1 × 10-7 M for chlorpyrifos, along with the limit of detection (LOD) down to 5.1 × 10-14 M (calculated for 10% inhibition). Furthermore, it is highly expected that this biosensor can be applied for the detection of other organophosphorus pesticides in the environment, providing an effective nanoplatform in biosensing field.
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Affiliation(s)
- Wei Guo
- State Key Laboratory of Food Nutrition and Safety, Tianjin University of Science and Technology, Tianjin 300457, China
| | - Lijun Liang
- State Key Laboratory of Food Nutrition and Safety, Tianjin University of Science and Technology, Tianjin 300457, China
| | - Yaxu Zhao
- State Key Laboratory of Food Nutrition and Safety, Tianjin University of Science and Technology, Tianjin 300457, China
| | - Congyi Zhao
- State Key Laboratory of Food Nutrition and Safety, Tianjin University of Science and Technology, Tianjin 300457, China
| | - Xiong Lu
- State Key Laboratory of Food Nutrition and Safety, Tianjin University of Science and Technology, Tianjin 300457, China.
| | - Yunpeng Cao
- State Key Laboratory of Food Nutrition and Safety, Tianjin University of Science and Technology, Tianjin 300457, China
| | - Faming Gao
- State Key Laboratory of Food Nutrition and Safety, Tianjin University of Science and Technology, Tianjin 300457, China.
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17
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Wang Y, Zhai H, Guo Q, Zhang Y, Gao X, Yang Q, Sun X, Guo Y, Zhang Y. A dual-modal electrochemical aptasensor based on intelligent DNA Walker with cascade signal amplification powered by Nb.BbvCI for Pb 2. Sci Total Environ 2023; 863:160910. [PMID: 36528096 DOI: 10.1016/j.scitotenv.2022.160910] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/07/2022] [Revised: 12/07/2022] [Accepted: 12/09/2022] [Indexed: 06/17/2023]
Abstract
As a unique nanomachine, DNA Walker can move continuously along a specific orbit to amplify signal. Therefore, based on DNA Walker and endonuclease assisted signal amplification strategy, a novel dual-mode visual electrochemical aptasensor was constructed for the detection of Pb2+. Ceric dioxide@mesoporous carbon (CeO2/CS)@AuNPs not only could improve the conductivity of sensing interface but also could fix the aptamer. DNA Walker moved on the surface of the electrode to realize the pairing with the Ag-γFe2O3/cDNA probe, forming a special base sequence that could be spliced by the Nb.BbvCI. Under the action of endonuclease Nb.BbvCI, the Ag-γFe2O3/cDNA probe was continuously sheared and the amount on the electrode was decreased to amplify the signal. Besides, the nanoenzyme of Ag-γFe2O3 could catalyze 3'3'5'5'-tetramethylbenzidine (TMB) to blue color realizing the visual detection of Pb2+. The sensor has been successfully applied to the visual and accurate rapid detection of Pb2+ in aquatic products. The fabricated method of the sensor open up a new way for visual and accurate the detection of environmental pollutants.
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Affiliation(s)
- Yue Wang
- School of Agricultural Engineering and Food Science, Shandong University of Technology, No. 266 Xincun Xilu, Zibo 255000, China; Shandong Province Engineering Research Center of Vegetable Safety and Quality Traceability, No. 266 Xincun Xilu, Zibo 255000, China; Zibo City Key Laboratory of Agricultural Product Safety Traceability, No. 266 Xincun Xilu, Zibo 255000, China
| | - Hongguo Zhai
- School of Agricultural Engineering and Food Science, Shandong University of Technology, No. 266 Xincun Xilu, Zibo 255000, China; Shandong Province Engineering Research Center of Vegetable Safety and Quality Traceability, No. 266 Xincun Xilu, Zibo 255000, China; Zibo City Key Laboratory of Agricultural Product Safety Traceability, No. 266 Xincun Xilu, Zibo 255000, China
| | - Qi Guo
- School of Agricultural Engineering and Food Science, Shandong University of Technology, No. 266 Xincun Xilu, Zibo 255000, China; Shandong Province Engineering Research Center of Vegetable Safety and Quality Traceability, No. 266 Xincun Xilu, Zibo 255000, China; Zibo City Key Laboratory of Agricultural Product Safety Traceability, No. 266 Xincun Xilu, Zibo 255000, China
| | - Yuhao Zhang
- School of Agricultural Engineering and Food Science, Shandong University of Technology, No. 266 Xincun Xilu, Zibo 255000, China; Shandong Province Engineering Research Center of Vegetable Safety and Quality Traceability, No. 266 Xincun Xilu, Zibo 255000, China; Zibo City Key Laboratory of Agricultural Product Safety Traceability, No. 266 Xincun Xilu, Zibo 255000, China
| | - Xiaolin Gao
- School of Agricultural Engineering and Food Science, Shandong University of Technology, No. 266 Xincun Xilu, Zibo 255000, China; Shandong Province Engineering Research Center of Vegetable Safety and Quality Traceability, No. 266 Xincun Xilu, Zibo 255000, China; Zibo City Key Laboratory of Agricultural Product Safety Traceability, No. 266 Xincun Xilu, Zibo 255000, China
| | - Qingqing Yang
- School of Agricultural Engineering and Food Science, Shandong University of Technology, No. 266 Xincun Xilu, Zibo 255000, China; Shandong Province Engineering Research Center of Vegetable Safety and Quality Traceability, No. 266 Xincun Xilu, Zibo 255000, China; Zibo City Key Laboratory of Agricultural Product Safety Traceability, No. 266 Xincun Xilu, Zibo 255000, China
| | - Xia Sun
- School of Agricultural Engineering and Food Science, Shandong University of Technology, No. 266 Xincun Xilu, Zibo 255000, China; Shandong Province Engineering Research Center of Vegetable Safety and Quality Traceability, No. 266 Xincun Xilu, Zibo 255000, China; Zibo City Key Laboratory of Agricultural Product Safety Traceability, No. 266 Xincun Xilu, Zibo 255000, China
| | - Yemin Guo
- School of Agricultural Engineering and Food Science, Shandong University of Technology, No. 266 Xincun Xilu, Zibo 255000, China; Shandong Province Engineering Research Center of Vegetable Safety and Quality Traceability, No. 266 Xincun Xilu, Zibo 255000, China; Zibo City Key Laboratory of Agricultural Product Safety Traceability, No. 266 Xincun Xilu, Zibo 255000, China
| | - Yanyan Zhang
- School of Agricultural Engineering and Food Science, Shandong University of Technology, No. 266 Xincun Xilu, Zibo 255000, China; Shandong Province Engineering Research Center of Vegetable Safety and Quality Traceability, No. 266 Xincun Xilu, Zibo 255000, China; Zibo City Key Laboratory of Agricultural Product Safety Traceability, No. 266 Xincun Xilu, Zibo 255000, China.
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18
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Le Luu T, Ngan PTK. Fabrication of high performance Ti/SnO 2-Nb 2O 5 electrodes for electrochemical textile wastewater treatment. Sci Total Environ 2023; 860:160366. [PMID: 36471521 DOI: 10.1016/j.scitotenv.2022.160366] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/02/2022] [Revised: 11/15/2022] [Accepted: 11/17/2022] [Indexed: 06/17/2023]
Abstract
Textile wastewater contains many organic compounds and colors that affect aquatic life and human health when discharged into the environment. High coloration due to excess dyes entering the wastewater causes coloration to the receiving water stream, affects the photosynthesis process of aquatic species, and adversely affects the landscape. SnO2-based electrodes have been extensively used in electrochemical water treatment, but their low durability decreases the pollutant treatment ability. Therefore, it is necessary to add another stable oxide to improve the performance and stability of SnO2 electrodes. This study aims to fabricate Ti/SnO2-Nb2O5 electrodes for the textile wastewater treatment using the electrochemical oxidation method. Different molar ratios of SnO2:Nb2O5 coating were prepared using the sol-gel method and then coated on the Ti substrates for calcination in 60 min at 500 °C. Scanning electron microscopy (SEM), X-ray diffraction (XRD), Brunauer Emmett Teller (BET), and cyclic voltammetry (CV) were used to determine the surface and electrochemical properties of Ti/SnO2-Nb2O5 electrodes. The SEM images show that SnO2-Nb2O5 electrode surfaces have the appearance of typical cracking structures of mixed metal oxides electrodes. The XRD spectrum show the SnO2 peaks of facet (110), (101), (200), (301), (321) and Nb2O5 peaks of facet (001), (002), (100), (101), (102) on Ti substrates. Furthermore, the specific surface area of the Ti/SnO2-Nb2O5 electrode ranges from 37.354 m2/g (SnO2:Nb2O5 = 9:1) to 71.885 m2/g (SnO2:Nb2O5 = 1:9). The electrochemical properties of SnO2:Nb2O5 electrodes showed high oxygen, chlorine evolution potential and high organic pollutant degradation in textile wastewater with COD removal at 83 %, decolorization at 74 % and the generation of many free radicals such as HO•, H2O2, O3, Cl2. The results demonstrate that the Ti/SnO2-Nb2O5 electrode with the mole ratio of 3:7 is the best in textile wastewater treatment with the longest service life (39 h).
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Affiliation(s)
- Tran Le Luu
- Master Program in Water Technology, Reuse, and Management, Vietnamese German University, Viet Nam.
| | - Pham Thi Kim Ngan
- Department of Chemical Engineering, Nong Lam University, Ho Chi Minh City, Viet Nam
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19
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Oliveira L, Pereira M, Pacheli Heitman A, Filho J, Oliveira C, Ziolek M. Niobium: The Focus on Catalytic Application in the Conversion of Biomass and Biomass Derivatives. Molecules 2023; 28:1527. [PMID: 36838514 PMCID: PMC9960283 DOI: 10.3390/molecules28041527] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2022] [Revised: 01/25/2023] [Accepted: 01/28/2023] [Indexed: 02/09/2023] Open
Abstract
The world scenario regarding consumption and demand for products based on fossil fuels has demonstrated the imperative need to develop new technologies capable of using renewable resources. In this context, the use of biomass to obtain chemical intermediates and fuels has emerged as an important area of research in recent years, since it is a renewable source of carbon in great abundance. It has the benefit of not contributing to the additional emission of greenhouse gases since the CO2 released during the energy conversion process is consumed by it through photosynthesis. In the presented review, the authors provide an update of the literature in the field of biomass transformation with the use of niobium-containing catalysts, emphasizing the versatility of niobium compounds for the conversion of different types of biomass.
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Affiliation(s)
- Luiz Oliveira
- Departamento de Química, Campus Pampulha, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, MG, Brazil
| | - Márcio Pereira
- Instituto de Ciência, Engenharia e Tecnologia, Campus Mucuri, Universidade Federal dos Vales Jequitinhonha e Mucuri, Teófilo Otoni 39803-371, MG, Brazil
| | - Ana Pacheli Heitman
- Departamento de Química, Campus Pampulha, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, MG, Brazil
| | - José Filho
- Departamento de Química, Campus Pampulha, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, MG, Brazil
| | - Cinthia Oliveira
- Departamento de Química, Campus Pampulha, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, MG, Brazil
| | - Maria Ziolek
- Faculty of Chemistry, Adam Mickiewicz University, Uniwersytetu Poznańskiego 8, 61-614 Poznań, Poland
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20
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Li H, Geng S, Liu T, Cao M, Su J. Synaptic and Gradual Conductance Switching Behaviors in CeO 2/Nb-SrTiO 3 Heterojunction Memristors for Electrocardiogram Signal Recognition. ACS Appl Mater Interfaces 2023; 15:5456-5465. [PMID: 36662834 DOI: 10.1021/acsami.2c19836] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
The synaptic properties of memristors have been widely studied. However, researchers are still committed to solving various challenges, including the study of highly reliable memristors with comprehensive synaptic functions and memristors that simulate highly complex neurological learning rules. In this work, we report a CeO2/Nb-SrTiO3 heterojunction memristor whose conductance could be gradually tuned under both positive and negative pulse trains. Due to the gradual conductance switching behavior and the high switching ratio (105), the CeO2/Nb-SrTiO3 heterojunction memristor could dutifully mimic biosynaptic functions, including excitatory/inhibitory postsynaptic current (EPSC/IPSC), paired-pulse facilitation and depression (PPF/PPD), spike amplitude-dependent plasticity (SADP), spike duration-dependent plasticity (SDDP), spike rate-dependent plasticity (SRDP), paired/triplet spiking-time-dependent plasticity (STDP), and Bienenstock-Cooper-Munro (BCM) rules. Moreover, a convolutional neural network based on the memristors is constructed to identify the electrocardiogram (ECG) data sets to realize the diagnosis of diseases with a recognition accuracy of 93%. Besides, the recognition accuracy of the handwriting digit reaches 96%. These studies broaden the research scope of high-level synaptic behavior and lay a foundation for the future full synaptic memristor networks.
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Affiliation(s)
- Hangfei Li
- College of Physics Science, Qingdao University, Qingdao266071, People's Republic of China
| | - Sunyingyue Geng
- College of Physics Science, Qingdao University, Qingdao266071, People's Republic of China
| | - Tong Liu
- College of Physics Science, Qingdao University, Qingdao266071, People's Republic of China
| | - MingHui Cao
- College of Physics Science, Qingdao University, Qingdao266071, People's Republic of China
| | - Jie Su
- College of Physics Science, Qingdao University, Qingdao266071, People's Republic of China
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21
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Ning Y, Wang X, Liu S, Li L, Lu F. A graphene-oxide-based aptasensor for fluorometric determination of chloramphenicol in milk and honey samples utilizing exonuclease III-assisted target recycling and Nb.BbvCI-powered DNA walker cascade amplification. Ecotoxicol Environ Saf 2023; 249:114449. [PMID: 38321668 DOI: 10.1016/j.ecoenv.2022.114449] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2022] [Revised: 12/14/2022] [Accepted: 12/16/2022] [Indexed: 02/08/2024]
Abstract
Herein, a graphene oxide (GO)-based fluorescence aptasensor was developed for the sensitive and selective detection of chloramphenicol (CAP), based on exonuclease III (Exo III)-assisted target recycling and Nb.BbvCI-driven DNA walker cascade amplification. Interactions between CAP, hairpin1(HP1), hairpin2 (HP2), and 3'-amino modified hairpin3 (HP3) labeled with carboxyfluorescein (FAM) and covalently coupled to GO enabled efficient CAP detection. CAP was quantitatively assayed by measuring fluorescence at excitation/emission wavelengths of 480/514 nm, resulting from the accumulation of released FAM. A good linear range of 1 fM to 1 nM and a limit of detection (LOD) of 0.875 fM (signal-to-noise (S/N)= 3) were achieved. This aptasensor can distinguish the CAP from interference antibiotics with good specificity and selectivity, even if the concentration of the interfering substance is ten-fold higher than the target concentration. Moreover, the developed fluorescence aptasensor was successfully applied for the detection of CAP in spiked milk and honey samples. Thus, this method is potentially applicable for assaying CAP in foods and provides a promising strategy for the development of fluorescence aptasensors for environmental sample analysis.
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Affiliation(s)
- Yi Ning
- Department of Microbiology, The Medicine School of Hunan University of Chinese Medicine, Changsha, Hunan 410208, PR China
| | - Xiaoqi Wang
- Department of Microbiology, The Medicine School of Hunan University of Chinese Medicine, Changsha, Hunan 410208, PR China
| | - Shiwu Liu
- Department of Microbiology, The Medicine School of Hunan University of Chinese Medicine, Changsha, Hunan 410208, PR China
| | - Ling Li
- Experimental Center of molecular biology, The Medicine School of Hunan University of Chinese Medicine, Changsha, Hunan 410208, PR China
| | - Fangguo Lu
- Department of Microbiology, The Medicine School of Hunan University of Chinese Medicine, Changsha, Hunan 410208, PR China.
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22
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Yang M, Yang C, Liang M, Yang G, Ran R, Zhou W, Shao Z. Solid Oxide Cells with Phase-Inversion Tape-Casted Hydrogen Electrode and SrSc 0.175Nb 0.025Co 0.8O 3-δ Oxygen Electrode for High-Performance Reversible Power Generation and Hydrogen Production. Molecules 2022; 27:molecules27238396. [PMID: 36500488 PMCID: PMC9735547 DOI: 10.3390/molecules27238396] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2022] [Revised: 11/22/2022] [Accepted: 11/24/2022] [Indexed: 12/05/2022] Open
Abstract
Solid oxide cells (SOCs) have been considered as a promising energy conversion and storage device. However, state-of-the-art cells' practical application with conventionally fabricated Ni-(Y2O3)0.08(ZrO2)0.92 (YSZ) cermet hydrogen electrode and La0.8Sr0.2MnO3 perovskite oxygen electrode is strongly limited by the unsatisfactory performance. Instead, new advances in cell materials and fabrication techniques that can lead to significant performance enhancements are urgently demanded. Here, we report a high-performance reversible SOC that consisted of a combination of SrSc0.175Nb0.025Co0.8O3-δ (SSNC) and phase-inversion tape-casted Ni-YSZ, which served as the oxygen and hydrogen electrode, respectively. The hydrogen electrode synthesized from phase-inversion tape-casting showed a high porosity of 60.8%, providing sufficient active sites for hydrogen oxidation in the solid oxide fuel cell (SOFC) mode and H2O electrolysis in the solid oxide electrolysis cell (SOEC) mode. Accordingly, it was observed that the maximum power density of 2.3 W cm-2 was attained at 750 °C in SOFC mode and a current density of -1.59 A cm-2 was obtained at 1.3 V in SOEC mode. Hence, these results reveal that the simultaneous optimization of oxygen and hydrogen electrodes is a pragmatic strategy that improves the performance of SOCs, which may significantly accelerate the commercialization of such an attractive technology.
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Affiliation(s)
- Meiting Yang
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Changjiang Yang
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Mingzhuang Liang
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Guangming Yang
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing 211816, China
- Correspondence:
| | - Ran Ran
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Wei Zhou
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Zongping Shao
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing 211816, China
- WA School of Mines: Minerals, Energy and Chemical Engineering, Curtin University, Perth, WA 6845, Australia
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23
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Cui Y, Guo P, Wang F, Dang P, Wang C, Jing P, Pu Y, Tao X. Self-Doping Based Facet Junctions and Oxygen Vacancies in Ferroelectric Bi 3Ti xNb 2-xO 9 Nanosheets for Boosting Photocatalytic Degradation and Antibacterial Activity. ACS Appl Mater Interfaces 2022; 14:51819-51834. [PMID: 36349934 DOI: 10.1021/acsami.2c12026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Constructing facet junction in semiconductor photocatalysts has been demonstrated as an effective method to promote charge-carrier separation and suppress carrier recombination. Herein, we proposed a novel but facile self-doping strategy to regulate the crystal facet exposure ratio in ferroelectric Bi3TixNb2-xO9 single-crystalline nanosheets, thereby optimizing its facet junction effect. Through tuning the atomic ratio of Ti and Nb, the exposure ratio of {001} and {110} crystal planes in Bi3TixNb2-xO9 nanosheets can be delicately modulated, and more {110} facets were exposed with the increase of the Ti/Nb atomic ratio as evidenced by the X-ray diffraction and scanning electron microscopy results. A facet junction between {110} and {001} crystal planes was verified based on the density functional theory calculation and photodeposition experiment results. Photogenerated electrons tend to accumulate in {110}, while holes gathered in {001} crystal planes. Owing to the optimal facet junction effect, the sample of Ti1.05 shows the most efficient charge-carrier separation and transportation compared to Ti0.95 and Ti1.00 as supported by the photoluminescence, surface photovoltage, photoelectrochemistry, and electron paramagnetic resonance (EPR) results. In addition, the oxygen vacancy arising from the inequivalent substitution of Nb5+ by Ti4+ as proved by X-ray photoelectron spectroscopy and EPR results and the enhanced ferroelectricity supported by P-E loops can also assist charge-carrier separation and migration. Benefiting from these properties, Ti1.05 outperformed Ti0.95 and Ti1.00 in the photodegradation of organic dye and antibiotic molecules. Meanwhile, the excellent antibacterial activity of Ti1.05 under visible light was also demonstrated by the Escherichia coli sterilization experiment. This work not only presents a novel pathway to adjust the facet junction but also provides new deep insights into the crystal facet engineering in ferroelectrics as photocatalysts.
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Affiliation(s)
- Yongfei Cui
- School of Materials Science and Engineering, Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic Materials, Shaanxi University of Science &Technology, Xi'an710021, Shaanxi, P. R. China
| | - Peng Guo
- School of Materials Science and Engineering, Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic Materials, Shaanxi University of Science &Technology, Xi'an710021, Shaanxi, P. R. China
| | - Fenghui Wang
- School of Materials Science and Engineering, Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic Materials, Shaanxi University of Science &Technology, Xi'an710021, Shaanxi, P. R. China
| | - Peipei Dang
- School of Materials Science and Engineering, Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic Materials, Shaanxi University of Science &Technology, Xi'an710021, Shaanxi, P. R. China
| | - Cuicui Wang
- School of Materials Science and Engineering, Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic Materials, Shaanxi University of Science &Technology, Xi'an710021, Shaanxi, P. R. China
| | - Panpan Jing
- School of Materials Science and Engineering, Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic Materials, Shaanxi University of Science &Technology, Xi'an710021, Shaanxi, P. R. China
| | - Yongping Pu
- School of Materials Science and Engineering, Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic Materials, Shaanxi University of Science &Technology, Xi'an710021, Shaanxi, P. R. China
| | - Xiaoma Tao
- School of Physics and Technology, Guangxi University, Nanning530004, Guangxi, P. R. China
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24
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Sun Y, Jiang L, Chen R, Li R, Kang H, Zeng Y, Yan Y, Priya S, Zhou Q. Design and Fabrication of 15-MHz Ultrasonic Transducers Based on a Textured Pb(Mg 1/3Nb 2/3)O 3-Pb(Zr, Ti)O 3 Ceramic. IEEE Trans Ultrason Ferroelectr Freq Control 2022; 69:3095-3101. [PMID: 35073262 DOI: 10.1109/tuffc.2022.3145882] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Ultrasound medical imaging is an entrenched and powerful tool for medical diagnosis. Image quality in ultrasound is mainly dependent on performance of piezoelectric transducer elements, which is further related to the electromechanical performance of the constituent piezoelectric materials. With rising need for piezoelectric materials with better performance and low cost, a highly 〈001〉 textured piezo ceramic, Pb(Mg1/3Nb2/3)O3-Pb(Zr, Ti)O3, has been developed. Recently, textured ceramic materials can be produced at low cost and exhibit high piezoelectric strain constants and large electromechanical coupling coefficients. In this work, 15-MHz ultrasonic transducers with an effective aperture of 2.5 mm in diameter based on these highly 〈001〉 textured ceramics have been successfully fabricated. The fabricated transducers achieved a central frequency of 15 MHz, a fractional bandwidth of 67% (at -6 dB), a high effective electromechanical coupling coefficient [Formula: see text] of 0.55, and a low insertion loss (IL) of 21 dB. Ex vivo ultrasonic imaging of a porcine eyeball was used to assess the tomography quality of the transducer. The results show that utilized textured ceramic has a great potential in developing ultrasonic devices for biomedical imaging purposes.
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25
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Ghani MU, Sultan F, Tag El Din ESM, Khan AR, Liu JB, Cancan M. A Paradigmatic Approach to Find the Valency-Based K-Banhatti and Redefined Zagreb Entropy for Niobium Oxide and a Metal-Organic Framework. Molecules 2022; 27:6975. [PMID: 36296567 PMCID: PMC9610924 DOI: 10.3390/molecules27206975] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2022] [Revised: 10/12/2022] [Accepted: 10/13/2022] [Indexed: 07/27/2023] Open
Abstract
Entropy is a thermodynamic function in chemistry that reflects the randomness and disorder of molecules in a particular system or process based on the number of alternative configurations accessible to them. Distance-based entropy is used to solve a variety of difficulties in biology, chemical graph theory, organic and inorganic chemistry, and other fields. In this article, the characterization of the crystal structure of niobium oxide and a metal-organic framework is investigated. We also use the information function to compute entropies by building these structures with degree-based indices including the K-Banhatti indices, the first redefined Zagreb index, the second redefined Zagreb index, the third redefined Zagreb index, and the atom-bond sum connectivity index.
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Affiliation(s)
- Muhammad Usman Ghani
- Institute of Mathematics, Khawaja Fareed University of Engineering & Information Technology, Abu Dhabi Road, Rahim Yar Khan 64200, Pakistan
| | - Faisal Sultan
- Institute of Mathematics, Khawaja Fareed University of Engineering & Information Technology, Abu Dhabi Road, Rahim Yar Khan 64200, Pakistan
| | - El Sayed M. Tag El Din
- Center of Research, Faculty of Engineering, Future University in Egypt, New Caira 11835, Egypt
| | - Abdul Rauf Khan
- Department of Mathematics, Faculty of Science, Ghazi University, Dera Ghazi Khan 32200, Pakistan
| | - Jia-Bao Liu
- School of Mathematics and Physics, Anhui Jianzhu University, Hefei 230601, China
| | - Murat Cancan
- Faculty of Education, Yuzuncu Yil University, Van 65140, Turkey
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26
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Yan H, He B, Zhao R, Ren W, Suo Z, Xu Y, Zhang Y, Bai C, Yan H, Liu R. Electrochemical aptasensor based on Ce 3NbO 7/CeO 2@Au hollow nanospheres by using Nb.BbvCI-triggered and bipedal DNA walker amplification strategy for zearalenone detection. J Hazard Mater 2022; 438:129491. [PMID: 35785741 DOI: 10.1016/j.jhazmat.2022.129491] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2022] [Revised: 06/15/2022] [Accepted: 06/26/2022] [Indexed: 06/15/2023]
Abstract
Herein, an electrochemical aptasensor combining Nb.BbvCI-triggered bipedal DNA walking strategy was constructed for ultrasensitive assay of zearalenone (ZEN). The aptasensor used Ce3NbO7/CeO2 @Au hollow nanospheres as electrode modification material and PdNi@MnO2/MB as the signal label. Importantly, the Ce3NbO7/CeO2 synthesized by hydrothermal method were combined with Au nanoparticles and applied to the electrode surface. The as-prepared Ce3NbO7/CeO2 @Au possessed a large surface area, excellent electrical conductivity, stability and more binding sites. PdNi@MnO2 with high specific surface area and porosity combined with molecule methylene blue (MB) was introduced into electrodes as the signal label. The proposed aptasensor utilized the advantages of specific recognition of aptamers and target molecules to release bipedal DNA walker (w-DNA), and then the w-DNA was triggered by Nb.BbvCI and entered the cycle to release more signal probes. The feasibility of this strategy was recorded by the differential pulse voltammetry (DPV) method. Under the optimized conditions, the electrochemical aptasensor exhibited a wide linear dynamic range from 1 × 10-4 to 1 × 103 ng mL-1 with a low detection limit of 4.57 × 10-6 ng mL-1. Moreover, the aptasensor had high selectivity, good stability, excellent repeatability and provided an effective method for the trace detection of ZEN in real samples.
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Affiliation(s)
- Han Yan
- School of Food Science and Technology, Henan University of Technology, Zhengzhou, Henan 450001, PR China
| | - Baoshan He
- School of Food Science and Technology, Henan University of Technology, Zhengzhou, Henan 450001, PR China.
| | - Renyong Zhao
- School of Food Science and Technology, Henan University of Technology, Zhengzhou, Henan 450001, PR China.
| | - Wenjie Ren
- School of Food Science and Technology, Henan University of Technology, Zhengzhou, Henan 450001, PR China
| | - Zhiguang Suo
- School of Food Science and Technology, Henan University of Technology, Zhengzhou, Henan 450001, PR China
| | - Yiwei Xu
- School of Food Science and Technology, Henan University of Technology, Zhengzhou, Henan 450001, PR China
| | - Yurong Zhang
- School of Food Science and Technology, Henan University of Technology, Zhengzhou, Henan 450001, PR China
| | - Chunqi Bai
- School of Food Science and Technology, Henan University of Technology, Zhengzhou, Henan 450001, PR China
| | - Haoyang Yan
- School of International Education, Henan University of Technology, Zhengzhou, Henan 450001, PR China
| | - Renli Liu
- Sinograin Zhengzhou Depot Ltd. Company, Zhengzhou, Henan 450066, PR China
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27
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Khare D, Majumdar S, Krishnamurthy S, Dubey AK. An in vivo toxicity assessment of piezoelectric sodium potassium niobate [Na xK 1-xNbO 3 (x = 0.2-0.8)] nanoparticulates towards bone tissue engineering approach. Biomater Adv 2022; 140:213080. [PMID: 35985067 DOI: 10.1016/j.bioadv.2022.213080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2022] [Revised: 07/26/2022] [Accepted: 08/08/2022] [Indexed: 06/15/2023]
Abstract
One of the recent challenges in the design/development of prosthetic orthopedic implants is to address the concern of local/systemic toxicity of debris particles, released due to wear or degradation. Such debris particles often lead to inflammation at the implanted site or aseptic loosening of the prosthesis which results in failure of the implant during long run. Several in vitro studies demonstrated the potentiality of piezoelectric sodium potassium niobate [NaxK1-xNbO3 (x = 0.2, 0.5, 0.8), NKN] as an emerging next-generation polarizable orthopedic implant. In this perspective, we performed an in vivo study to examine the local and systemic toxicity of NKN nanoparticulates, as a first report. In the present study, male Wistar rats were intra-articularly injected to the knee joint with 100 μl of NKN nanoparticulates (25 mg/ml in normal saline). After 7 days of exposure, the histopathological analyses demonstrate the absence of any inflammation or dissemination of nanoparticulates in vital organs such as heart, liver, kidney and spleen. The anti-inflammatory cytokines (IL-4 and IL-10) profile analyses suggest the increased anti-inflammatory response in the treated rats as compared to non-injected (control) rats, preferably for the sodium and potassium rich NKN i.e., Na0.8K0.2NbO3 and Na0.2K0.8NbO3. The biochemical analyses revealed no pathological changes in the liver and kidney of particulate treated rats. The present study is the first proof to confirm the non-toxic nature of NKN nanoparticulates which provides a step forward towards the development of prosthetic orthopedic implants using biocompatible piezoelectric NKN ceramics.
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Affiliation(s)
- Deepak Khare
- Department of Ceramic Engineering, Indian Institute of Technology (BHU) Varanasi, 221005, India
| | - Shreyasi Majumdar
- Department of Pharmaceutical Engineering and Technology, Indian Institute of Technology (BHU) Varanasi, 221005, India
| | - Sairam Krishnamurthy
- Department of Pharmaceutical Engineering and Technology, Indian Institute of Technology (BHU) Varanasi, 221005, India
| | - Ashutosh Kumar Dubey
- Department of Ceramic Engineering, Indian Institute of Technology (BHU) Varanasi, 221005, India.
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Huang B, Liu Z, Wang Y, Zhou L, Wang C, Ye T. Release behavior and mechanism of uranium and thorium from Ta-Nb tailings under simulated rainfall in Jiangxi Province, China. Environ Sci Pollut Res Int 2022; 29:57466-57478. [PMID: 35352230 DOI: 10.1007/s11356-022-19931-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2021] [Accepted: 03/23/2022] [Indexed: 06/14/2023]
Abstract
Tantalum-niobium ore belongs to associated radioactive ore, which is accompanied by a certain amount of radioactive uranium and thorium. The remaining slag is enriched with a large number of radionuclides; after weathering, natural rainfall, and surface water scouring, radioactive elements such as uranium, thorium, and some heavy metal elements are exposed or washed into the soil, which poses a threat to the ecological environment and human health. In this study, for characterization analysis during, before, and after leaching, dynamic simulation experiment was carried out on a Ta-Nb slag sample in Jiangxi, China. From SEM analysis, the soluble substances adsorbed on the slag surface dissolve into the solution after leaching in simulated rainfall, and the remained slag becomes smooth with different particle sizes. The XRD diffraction analysis of the sample showed that after leaching in simulated rainfall, the existing forms of elements are different. pH of the leachate of Ta-Nb slag is 1.79; Ta-Nb slag contains many rare metal elements, nonmetal elements, radioactive elements, and some salt compounds; and the content of thorium is higher than that of uranium by EDS analysis. The release of uranium and thorium is obviously affected by the amount of leachate and pH. Under the lower pH of leaching solution, the release of uranium and thorium is more effective. The results of Fick diffusion theory and Elovich equation show that the release and migration mode of uranium and thorium in Ta-Nb slag are mainly surface elution; under acidic conditions, the release and migration of uranium and thorium are faster. This study provides basic data and scientific information for solving the key problems of pollution control of associated radioactive waste in environmental protection.
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Affiliation(s)
- Bin Huang
- State Key Laboratory of Nuclear Resources and Environment, East China University of Technology, Nanchang, People's Republic of China
- School of Nuclear Science and Engineering, East China University of Technology, Nanchang, 330013, China
| | - Zhirong Liu
- State Key Laboratory of Nuclear Resources and Environment, East China University of Technology, Nanchang, People's Republic of China.
- School of Chemistry, Biological and Materials Science, East China University of Technology, Nanchang, People's Republic of China.
| | - Yun Wang
- State Key Laboratory of Nuclear Resources and Environment, East China University of Technology, Nanchang, People's Republic of China
| | - Limin Zhou
- State Key Laboratory of Nuclear Resources and Environment, East China University of Technology, Nanchang, People's Republic of China
- School of Chemistry, Biological and Materials Science, East China University of Technology, Nanchang, People's Republic of China
| | - Changfu Wang
- State Key Laboratory of Nuclear Resources and Environment, East China University of Technology, Nanchang, People's Republic of China
- School of Nuclear Science and Engineering, East China University of Technology, Nanchang, 330013, China
| | - Tianzhen Ye
- State Key Laboratory of Nuclear Resources and Environment, East China University of Technology, Nanchang, People's Republic of China
- School of Chemistry, Biological and Materials Science, East China University of Technology, Nanchang, People's Republic of China
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29
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Wolski L, Sobańska K, Muńko M, Czerniak A, Pietrzyk P. Unraveling the Origin of Enhanced Activity of the Nb 2O 5/H 2O 2 System in the Elimination of Ciprofloxacin: Insights into the Role of Reactive Oxygen Species in Interface Processes. ACS Appl Mater Interfaces 2022; 14:31824-31837. [PMID: 35816763 PMCID: PMC9305982 DOI: 10.1021/acsami.2c04743] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
The overlooked role of reactive oxygen species (ROS), formed and stabilized on the surface of Nb2O5 after H2O2 treatment, was investigated in the adsorption and degradation of ciprofloxacin (CIP), a model antibiotic. The contribution of ROS to the elimination of CIP was assessed by using different niobia-based materials in which ROS were formed in situ or ex situ. The formation of ROS was confirmed by electron paramagnetic resonance (EPR) and Raman spectroscopy. The modification of the niobia surface charge by ROS was monitored with zeta potential measurements. The kinetics of CIP removal was followed by UV-vis spectroscopy, while identification of CIP degradation products and evaluation of their cytotoxicity were obtained with liquid chromatography-mass spectrometry (LC-MS) and microbiological studies, respectively. Superoxo and peroxo species were found to significantly improve the efficiency of CIP adsorption on Nb2O5 by modifying its surface charge. At the same time, it was found that improved removal of CIP in the dark and in the presence of H2O2 was mainly determined by the adsorption process. The enhanced adsorption was confirmed by infrared spectroscopy (IR), total organic carbon measurements (TOC), and elemental analysis. Efficient chemical degradation of adsorbed CIP was observed upon exposure of the Nb2O5/H2O2 system to UV light. Therefore, niobia is a promising inorganic adsorbent that exhibits enhanced sorption capacity toward CIP in the presence of H2O2 under dark conditions and can be easily regenerated in an environmentally benign way by irradiation with UV light.
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Affiliation(s)
- Lukasz Wolski
- Faculty
of Chemistry, Adam Mickiewicz University,
Poznań, ul. Uniwersytetu Poznańskiego 8, 61-614 Poznań, Poland
| | - Kamila Sobańska
- Faculty
of Chemistry, Jagiellonian University, ul. Gronostajowa 2, 30-387 Kraków, Poland
| | - Malwina Muńko
- Center
for Advanced Technology, Adam Mickiewicz
University, Poznań, ul. Uniwersytetu Poznańskiego 10, 61-614 Poznań, Poland
| | - Adrian Czerniak
- Center
for Advanced Technology, Adam Mickiewicz
University, Poznań, ul. Uniwersytetu Poznańskiego 10, 61-614 Poznań, Poland
| | - Piotr Pietrzyk
- Faculty
of Chemistry, Jagiellonian University, ul. Gronostajowa 2, 30-387 Kraków, Poland
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30
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Chen J, Liu Y, Cheng G, Guo J, Du S, Qiu J, Wang C, Li C, Yang X, Chen T, Chen Z. Tailored Hydrogel Delivering Niobium Carbide Boosts ROS-Scavenging and Antimicrobial Activities for Diabetic Wound Healing. Small 2022; 18:e2201300. [PMID: 35678523 DOI: 10.1002/smll.202201300] [Citation(s) in RCA: 47] [Impact Index Per Article: 23.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Revised: 05/18/2022] [Indexed: 06/15/2023]
Abstract
The treatment of diabetic wounds remains challenging due to the excess levels of oxidative stress, vulnerability to bacterial infection, and persistent inflammation response during healing. The development of hydrogel wound dressings with ideal anti-inflammation, antioxidant, and anti-infective properties is an urgent clinical requirement. In the present study, an injectable thermosensitive niobium carbide (Nb2 C)-based hydrogel (Nb2 C@Gel) with antioxidative and antimicrobial activity is developed to promote diabetic wound healing. The Nb2 C@Gel system is composed of Nb2 C and a PLGA-PEG-PLGA triblock copolymer. The fabricated Nb2 C nanosheets (NSs) show good biocompatibility during in vitro cytotoxicity and hemocompatibility assays and in vivo toxicity assays. In vitro experiments show that Nb2 C NSs can efficiently eliminate reactive oxygen species (ROS), thus protecting cells in the wound from oxidative stress damage. Meanwhile, Nb2 C NSs also exhibit good near-infrared (NIR) photothermal antimicrobial activity against both Staphylococcus aureus and Escherichia coli. In vivo results demonstrate that Nb2 C@Gel promotes wound healing by attenuating ROS levels, reducing oxidative damage, eradicating bacterial infection under NIR irradiation, and accelerating angiogenesis. To summarize, the Nb2 C@Gel system, with its ROS-scavenging, photothermal antimicrobial and hemostatic activities, can be a promising and effective strategy for the treatment of diabetic wounds.
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Affiliation(s)
- Jing Chen
- Department of Hand Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China
| | - Yujing Liu
- Science and Technology Innovation Center, Guangzhou University of Chinese Medicine, Guangzhou, 510405, China
| | - Guopan Cheng
- Science and Technology Innovation Center, Guangzhou University of Chinese Medicine, Guangzhou, 510405, China
| | - Jiahe Guo
- Department of Hand Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China
| | - Shuang Du
- Science and Technology Innovation Center, Guangzhou University of Chinese Medicine, Guangzhou, 510405, China
| | - Jinmei Qiu
- Science and Technology Innovation Center, Guangzhou University of Chinese Medicine, Guangzhou, 510405, China
| | - Cheng Wang
- Department of Hand Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China
| | - Chengcheng Li
- Department of Hand Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China
| | - Xiaofan Yang
- Department of Hand Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China
| | - Tongkai Chen
- Science and Technology Innovation Center, Guangzhou University of Chinese Medicine, Guangzhou, 510405, China
| | - Zhenbing Chen
- Department of Hand Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China
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31
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Ju S, Zhang H, Kosinski JA. Improved Extraction of Second-Order Material Constants for Current Generation Y-Grown La₃Ga 5.5Nb 0.5O₁₄ (LGN) Crystal. IEEE Trans Ultrason Ferroelectr Freq Control 2022; 69:2137-2142. [PMID: 35404816 DOI: 10.1109/tuffc.2022.3166549] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
With higher demand for sensor development, piezoelectric materials with advanced performance and wide availability draw more attention today. Accurate second-order material constants are necessary for modeling and mechanical design of sensors that make use of langanite (La3Ga5.5Nb0.5O14, LGN) crystals. We report here on room temperature LGN bulk acoustic wave (BAW) velocities obtained with reduced uncertainties using ultrasound measurements and taking advantage of the cross correlation signal processing technique, and a full set of LGN material constants extracted from the BAW velocity results. Our results compare favorably with prior results assessed as using a reliable measurement technique, and differ in expected fashion from other results based on techniques that do not address a known weakness in the measurement technique.
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32
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Yoshioka K, Kurashina Y, Ogawa A, Asakura T. Effect of the area of a lithium niobate transducer on the efficiency of ultrasonic atomization driven by resonance vibration. Ultrason Sonochem 2022; 86:106019. [PMID: 35504139 PMCID: PMC9065876 DOI: 10.1016/j.ultsonch.2022.106019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Revised: 04/23/2022] [Accepted: 04/26/2022] [Indexed: 06/14/2023]
Abstract
In recent years, individual control of one's personal environment has been drawing increasing attention due to the growing interest in health care. Wearable devices are especially useful because of their controllability regardless of location. Humidity is one of the inevitable factors in the personal environment as a preventive against infectious diseases. Although atomization devices are commonly used as a method of humidity control, at present, there are no wearable humidity control devices. Vibration of a lithium niobate (LN) device in the thickness mode is a promising piezoelectric method for miniaturization of atomization devices for humidity control. To miniaturize the atomization device, the transducer size needs to be small not so much as to decrease the atomization efficiency. However, the effect of the device area on the atomization efficiency of LN at a size suitable for mounting in wearable devices has not been studied. Here, we conducted an atomization demonstration of LN devices with different sizes to evaluate particle size and atomization efficiency. Furthermore, to reveal the relationship between vibration behavior and atomization efficiency, resonance vibration in the MHz frequency band was evaluated by the finite element method and an impedance analyzer. The results showed that the peak size of water particles atomized by each device was in the range of 3.2 to 4.2 µm, which is smaller than particles produced by typical piezoelectric ceramics. Moreover, the best LN size for efficient atomization was found to be 8 mm × 10 mm among the five LN device sizes used in experiments. From the relationship between vibration behavior and atomization efficiency, the size of the transducer was suggested to affect the vibration mode. The obtained result suggested that the LN device is suitable for small wearable nebulizer devices.
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Affiliation(s)
- Keisuke Yoshioka
- School of Mechanical Engineering, Graduate School of Science and Technology, Tokyo University of Science, Japan
| | - Yuta Kurashina
- Department of Materials Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology, Japan; Department of Mechanical Systems Engineering, Faculty of Engineering, Tokyo University of Agriculture and Technology, Japan.
| | - Ami Ogawa
- Department of System Design Engineering, Faculty of Science and Technology, Keio University, Yokohama, Japan
| | - Takumi Asakura
- School of Mechanical Engineering, Graduate School of Science and Technology, Tokyo University of Science, Japan.
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33
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Klopfer E, Dagli S, Barton D, Lawrence M, Dionne JA. High-Quality-Factor Silicon-on-Lithium Niobate Metasurfaces for Electro-optically Reconfigurable Wavefront Shaping. Nano Lett 2022; 22:1703-1709. [PMID: 35112873 DOI: 10.1021/acs.nanolett.1c04723] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Dynamically reconfigurable metasurfaces promise compact and lightweight spatial light modulation for many applications, including LiDAR, AR/VR, and LiFi systems. Here, we design and computationally investigate high-quality-factor silicon-on-lithium niobate metasurfaces with electrically driven, independent control of its constituent nanobars for full phase tunability with high tuning efficiency. Free-space light couples to guided modes within each nanobar via periodic perturbations, generating quality factors exceeding 30,000 while maintaining a bar spacing of <λ/1.5. We achieve nearly 2π phase variation with an applied bias not exceeding ±25 V, maintaining a reflection efficiency above 91%. Using full-field simulations, we demonstrate a high-angle (51°) switchable beamsplitter with a diffracted efficiency of 93% and an angle-tunable beamsteerer, spanning 18-31°, with up to 86% efficiency, all using the same metasurface device. Our platform provides a foundation for highly efficient wavefront-shaping devices with a wide dynamic tuning range capable of generating nearly any transfer function.
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Affiliation(s)
- Elissa Klopfer
- Department of Materials Science and Engineering, Stanford University, Stanford, California 94305, United States
| | - Sahil Dagli
- Department of Materials Science and Engineering, Stanford University, Stanford, California 94305, United States
| | - David Barton
- John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02139, United States
| | - Mark Lawrence
- Department of Electrical and Systems Engineering, Washington University in St. Louis, St. Louis, Missouri 63130, United States
| | - Jennifer A Dionne
- Department of Materials Science and Engineering, Stanford University, Stanford, California 94305, United States
- Department of Radiology, Stanford University, Stanford, California 94305, United States
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34
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Ouyang W, Zhou Y, Fei X, Bai Y, Wang H, Wu Z. Simultaneous removal of NO and dichloromethane (CH 2Cl 2) over Nb-loaded cerium nanotubes catalyst. J Environ Sci (China) 2022; 111:175-184. [PMID: 34949347 DOI: 10.1016/j.jes.2021.03.022] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2021] [Revised: 03/10/2021] [Accepted: 03/10/2021] [Indexed: 06/14/2023]
Abstract
Herein, a series of niobium oxide supported cerium nanotubes (CeNTs) catalysts with different loading amount of Nb2O5 (0-10 wt.%) were prepared and used for selective catalytic reduction of NOx with NH3 (NH3-SCR) in the presence of CH2Cl2. Commercial V2O5-WO3-TiO2 catalyst was also prepared for comparison. The physcial properties and chemical properties of the Nb2O5 loaded cerium nanotubes catalysts were investigated by X-ray diffractometer, Transmission electron microscope, Brunauer-Emmett-Teller specific surface area, H2-temperature programmed reduction, NH3-temperature programmed desorption and X-ray photoelectron spectroscopy. The experiment results showed that the loading amount of Nb2O5 had a significant effect on the catalytic performance of the catalysts. 10 wt.% Nb-CeNTs catalyst presented the best NH3-SCR performance and degradation efficiency of CH2Cl2 among the prepared catalysts, due to its superior redox capability, abundant surface oxygen species and acid sites, the interaction between Nb and Ce, higher ratio of Nb4+/(Nb5++ Nb4+) and Ce3+/(Ce3+ + Ce4+), as well as the special tubular structure of cerium nanotube. This study may provide a practical approach for the design and synthesis of SCR catalysts for the simultaneously removal NOx and chlorinated volatile organic compounds (CVOCs) emitted from the stationary industrial sources.
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Affiliation(s)
- Weilong Ouyang
- Key Laboratory of Environment Remediation and Ecological Health, Ministry of Education, College of Environmental and Resources Science, Zhejiang University, Hangzhou 310058, China; Zhejiang Provincial Engineering Research Center of Industrial Boiler and Furnace Flue Gas Pollution Control, Hangzhou 310058, China
| | - Yi Zhou
- Key Laboratory of Environment Remediation and Ecological Health, Ministry of Education, College of Environmental and Resources Science, Zhejiang University, Hangzhou 310058, China; Zhejiang Provincial Engineering Research Center of Industrial Boiler and Furnace Flue Gas Pollution Control, Hangzhou 310058, China
| | - Xiaoqi Fei
- Key Laboratory of Environment Remediation and Ecological Health, Ministry of Education, College of Environmental and Resources Science, Zhejiang University, Hangzhou 310058, China; Zhejiang Provincial Engineering Research Center of Industrial Boiler and Furnace Flue Gas Pollution Control, Hangzhou 310058, China
| | - Yarong Bai
- Key Laboratory of Environment Remediation and Ecological Health, Ministry of Education, College of Environmental and Resources Science, Zhejiang University, Hangzhou 310058, China; Zhejiang Provincial Engineering Research Center of Industrial Boiler and Furnace Flue Gas Pollution Control, Hangzhou 310058, China
| | - Haiqiang Wang
- Key Laboratory of Environment Remediation and Ecological Health, Ministry of Education, College of Environmental and Resources Science, Zhejiang University, Hangzhou 310058, China; Zhejiang Provincial Engineering Research Center of Industrial Boiler and Furnace Flue Gas Pollution Control, Hangzhou 310058, China.
| | - Zhongbiao Wu
- Key Laboratory of Environment Remediation and Ecological Health, Ministry of Education, College of Environmental and Resources Science, Zhejiang University, Hangzhou 310058, China; Zhejiang Provincial Engineering Research Center of Industrial Boiler and Furnace Flue Gas Pollution Control, Hangzhou 310058, China
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35
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Jawed SF, Rabadia CD, Azim F, Khan SJ. Effect of Nb on β → α ″ Martensitic Phase Transformation and Characterization of New Biomedical Ti-xNb-3Fe-9Zr Alloys. Scanning 2021; 2021:8173425. [PMID: 34950283 PMCID: PMC8668309 DOI: 10.1155/2021/8173425] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/23/2021] [Accepted: 11/15/2021] [Indexed: 06/14/2023]
Abstract
A new generation of Ti-xNb-3Fe-9Zr (x = 15, 20, 25, 30, 35 wt %) alloys have been designed using various theoretical approaches including DV-xα cluster, molybdenum equivalency, and electron to atom ratio. Afterward, designed alloys are fabricated using cold crucible levitation melting technique. The microstructure and mechanical performances of newly designed alloys are characterized in this work using scanning electron microscope and universal testing machine, respectively. Each alloy demonstrates monolithic β phase except Ti-35Nb-3Fe-9Zr alloy which display dual α ″ + β phases. Typically, niobium acts as an isomorphous beta stabilizer. However, in this work, formation of martensitic α ″ phases occurs at 35 wt % of niobium among the series of newly designed alloys. Furthermore, none of the alloys fail till the maximum load capacity of machine, i.e., 100 KN except Ti-35Nb-3Fe-9Zr alloy. Moreover, the Vickers hardness test is carried out on Ti-xNb-3Fe-9Zr alloys which demonstrate slip bands around the indentation for each alloy. Notably, the deformation bands and cracks around the indentations of each alloy have been observed using optical microscopy; Ti-35Nb-3Fe-9Zr demonstrates some cracks along with slip bands around its indentation. The Ti-25Nb-3Fe-9Zr alloy shows the highest yield strength of 1043 ± 20 MPa, large plasticity of 32 ± 0.5%, and adequate hardness of 152 ± 3.90 Hv among the investigated alloys. The Ti-25Nb-3Fe-9Zr alloy demonstrates good blend of strength and malleability. Therefore, Ti-25Nb-3Fe-9Zr can be used effectively for the biomedical applications.
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Affiliation(s)
- Syed Faraz Jawed
- Department of Biomedical Engineering, Ziauddin University, Pakistan
| | - Chirag Dhirajlal Rabadia
- School of Engineering, Edith Cowan University, Joondalup, WA, Australia
- Engineering Institute of Technology, Marquis St, Bentley WA, Australia
| | - Fahad Azim
- Department of Electrical Engineering, Ziauddin University, Pakistan
| | - Saad Jawaid Khan
- Department of Biomedical Engineering, Ziauddin University, Pakistan
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36
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de Jesus ET, Moreira AJ, Sá MC, Freschi GPG, Joya MR, Li MS, Paris EC. Potential of Nb 2O 5 nanofibers in photocatalytic degradation of organic pollutants. Environ Sci Pollut Res Int 2021; 28:69401-69415. [PMID: 34302247 DOI: 10.1007/s11356-021-15435-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2021] [Accepted: 07/09/2021] [Indexed: 06/13/2023]
Abstract
Various photocatalytic nanomaterials for environmental remediation have been promoted due to the pollution caused by different organic pollutants. In this study, Nb2O5 nanofibers were obtained by electrospinning technique, presenting controlled crystallinity and high specific surface area to improve the photoactivity response. The structural characterization indicated Nb2O5 nanofibers with orthorhombic phase formation. The photoluminescence measurements showed different energy levels contributing to the electronic transition events. The nanofibers with a bandgap up to 3.6 eV were applied to photocatalysis of dyes (rhodamine B (RhB) or methylene blue (MB)) and fluoxetine (FLX), listed as an emergent pollutant. In the optimized condition (pH = 9), the RhB and MB photocatalysis was 59% and 93% more efficient than photolysis due to ζ = - 50 mV ± 5 for EtOH_550 sample increased interaction with MB (cationic) compared to RhB unprotonated (pKa = 3.7). Therefore, FLX (pKa = 10.7) was selected due to protonated form at pH = 9 and showed 68% ± 1 adsorption in 30 min for EtOH_550. The FLX photocatalytic degradation under UV light irradiation was up to 17% higher than the photolytic degradation. The formation of hydroxyl radicals in the photocatalytic system (EtOH_550) was proven by the Coumarine probe assay, corroborating with the greater amount of α-[2-(methylamino)ethyl]benzylalcohol (MAEB), a by-product obtained after FLX oxidation. Additionally, the material achieved specific catalytic activity for the different organic compounds (RhB, MB, or FLX). Therefore, Nb2O5 nanofibers were efficient for degrading three different pollutants under UV light, proving a viable alternative for environmental remediation.
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Affiliation(s)
- Edson Tobias de Jesus
- Nanotechnology National Laboratory for Agriculture (LNNA), Embrapa Instrumentação, XV de Novembro St., 1452, zip code, São Carlos, SP, 13560-970, Brazil
- Department of Chemistry, Federal University of São Carlos, Rod. Washington Luiz, km 235, zip code, São Carlos, SP, 13565-905, Brazil
- Federal Institute of Education, Science and Technology of Maranhão, Baronesa street, zip code, Alcântara, MA, 65250-000, Brazil
| | - Ailton José Moreira
- Department of Chemistry, Federal University of São Carlos, Rod. Washington Luiz, km 235, zip code, São Carlos, SP, 13565-905, Brazil
- LAFFEQ, Institute of Science and Technology, Federal University of Alfenas, UNIFAL-MG, Poços de Caldas, MG, 37715-400, Brazil
| | - Mayara Coelho Sá
- Nanotechnology National Laboratory for Agriculture (LNNA), Embrapa Instrumentação, XV de Novembro St., 1452, zip code, São Carlos, SP, 13560-970, Brazil
- Department of Chemistry, Federal University of São Carlos, Rod. Washington Luiz, km 235, zip code, São Carlos, SP, 13565-905, Brazil
- Federal Institute of Education, Science and Technology of Maranhão, Baronesa street, zip code, Alcântara, MA, 65250-000, Brazil
| | - Gian Paulo Giovanni Freschi
- LAFFEQ, Institute of Science and Technology, Federal University of Alfenas, UNIFAL-MG, Poços de Caldas, MG, 37715-400, Brazil
| | - Miryam Rincón Joya
- Departamento de Física, Universidad Nacional de Colombia, Calle 45 #30-03, Bogotá, C.P. 111321, Colombia
| | - Maximo Siu Li
- Institute of Physics, University of São Paulo, São Carlos, SP, 13563-120, Brazil
| | - Elaine Cristina Paris
- Nanotechnology National Laboratory for Agriculture (LNNA), Embrapa Instrumentação, XV de Novembro St., 1452, zip code, São Carlos, SP, 13560-970, Brazil.
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37
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Lu Y, Zhang X, Hou X, Feng M, Cao Z, Liu J. Functionalized 2D Nb 2C nanosheets for primary and recurrent cancer photothermal/immune-therapy in the NIR-II biowindow. Nanoscale 2021; 13:17822-17836. [PMID: 34668898 DOI: 10.1039/d1nr05126a] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Near-infrared-II (NIR-II) cancer photothermal therapy (PTT) has become more and more attractive as the NIR-II light shows a higher tissue penetrating depth, which leads to better anti-cancer effects. Recently, the members of the MXene family have been reported as NIR-II photothermal agents, possessing a high specific surface area and a fascinating light-to-heat conversion rate at the same time. Herein, we reported a combination of NIR-II photothermal therapy and immune therapy based on the MXene family member niobium carbide (Nb2C). First, Nb2C nanosheets (NSs) under 50 nm were prepared. They showed a high photothermal conversion efficiency under a 1064-nm laser, and the NIR-II light showed a deeper tissue penetration depth. Then, a nanoplatform with high R837 stability and a high loading rate was obtained after modification with a polydopamine (PDA) layer on the surface of Nb2C. With the R837 modification, the percentage of mature dendritic cells (DCs) increased and the immune response enhanced, compared with the immune response caused by PTT only. Finally, a red blood cell (RBC) membrane was applied as a coat over the nanoplatform in order to avoid excessive blood clearance. During in vivo experiments, blood circulation of Nb2C@PDA-R837@RBC nanoparticles (NPs) was prolonged, and all primary tumors were eliminated. Secondary tumors were also inhibited effectively due to the strengthened immune response, proving that Nb2C@PDA-R837@RBC NPs could inhibit tumor recurrence. All the results above indicated Nb2C@PDA-R837@RBC NPs as a potential RBC camouflaged nanoplatform for the combination of effective PTT and immune therapy towards tumor treatment.
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Affiliation(s)
- Yao Lu
- School of Biomedical Engineering, Shenzhen Campus of Sun Yat-sen University, Shenzhen, Guangdong 518107, China.
| | - Xiaoge Zhang
- School of Biomedical Engineering, Shenzhen Campus of Sun Yat-sen University, Shenzhen, Guangdong 518107, China.
| | - Xiuqi Hou
- School of Biomedical Engineering, Shenzhen Campus of Sun Yat-sen University, Shenzhen, Guangdong 518107, China.
| | - Miao Feng
- School of Biomedical Engineering, Shenzhen Campus of Sun Yat-sen University, Shenzhen, Guangdong 518107, China.
| | - Zhong Cao
- School of Biomedical Engineering, Shenzhen Campus of Sun Yat-sen University, Shenzhen, Guangdong 518107, China.
| | - Jie Liu
- School of Biomedical Engineering, Shenzhen Campus of Sun Yat-sen University, Shenzhen, Guangdong 518107, China.
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Alias N, Hussain Z, Tan WK, Kawamura G, Muto H, Matsuda A, Lockman Z. Nanoporous anodic Nb 2O 5 with pore-in-pore structure formation and its application for the photoreduction of Cr(VI). Chemosphere 2021; 283:131231. [PMID: 34144283 DOI: 10.1016/j.chemosphere.2021.131231] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2021] [Revised: 06/08/2021] [Accepted: 06/12/2021] [Indexed: 06/12/2023]
Abstract
An anodic film with a nanoporous structure was formed by anodizing niobium at 60 V in fluorinated ethylene glycol (fluoride-EG). After 30 min of anodization, the anodic film exhibited a "pore-in-pore" structure; that is, there were smaller pores growing inside larger pores. The as-anodized film was weakly crystalline and became orthorhombic Nb2O5 after heat treatment. The energy band gap of the annealed nanoporous Nb2O5 film was 2.9 eV. A photocatalytic reduction experiment was performed on Cr(VI) under ultraviolet (UV) radiation by immersing the nanoporous Nb2O5 photocatalyst in a Cr(VI) solution at pH 2. The reduction process was observed to be very slow; hence, ethylenediaminetetraacetic acid (EDTA) was added as an organic hole scavenger, which resulted in 100% reduction after 45 min of irradiation. The photocatalytic reduction experiment was also performed under visible light, and findings showed that complete reduction achieved after 120 min of visible light exposure.
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Affiliation(s)
- Nurhaswani Alias
- School of Materials and Mineral Resources Engineering, Engineering Campus, Universiti Sains Malaysia, 14300, Nibong Tebal, Pulau Pinang, Malaysia
| | - Zuhailawati Hussain
- School of Materials and Mineral Resources Engineering, Engineering Campus, Universiti Sains Malaysia, 14300, Nibong Tebal, Pulau Pinang, Malaysia
| | - Wai Kian Tan
- Institute of Liberal Arts and Sciences, Toyohashi University of Technology, 1-1 Hibarigaoka, Tempaku-cho, Toyohashi, Aichi, 441-8580, Japan.
| | - Go Kawamura
- Department of Electrical and Electronic Information Engineering, Toyohashi University of Technology, 1-1 Hibarigaoka, Tempaku-cho, Toyohashi, Aichi, 441-8580, Japan
| | - Hiroyuki Muto
- Institute of Liberal Arts and Sciences, Toyohashi University of Technology, 1-1 Hibarigaoka, Tempaku-cho, Toyohashi, Aichi, 441-8580, Japan; Department of Electrical and Electronic Information Engineering, Toyohashi University of Technology, 1-1 Hibarigaoka, Tempaku-cho, Toyohashi, Aichi, 441-8580, Japan
| | - Atsunori Matsuda
- Department of Electrical and Electronic Information Engineering, Toyohashi University of Technology, 1-1 Hibarigaoka, Tempaku-cho, Toyohashi, Aichi, 441-8580, Japan
| | - Zainovia Lockman
- School of Materials and Mineral Resources Engineering, Engineering Campus, Universiti Sains Malaysia, 14300, Nibong Tebal, Pulau Pinang, Malaysia.
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Scharnberg ARDA, Berutti FA, Alves AK. Visible-light Bi-Fe-Nb-O photoanodes for solar-light driven hydrogen production. Environ Technol 2021; 42:4355-4362. [PMID: 32310020 DOI: 10.1080/09593330.2020.1758218] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2020] [Accepted: 04/14/2020] [Indexed: 06/11/2023]
Abstract
Currently, CO2 emission is the main cause of climate change and its various related environmental impacts. Therefore, we have as a prime the development of clean sources of energy. The hydrogen economy is very attractive in this regard, however, when generated from the methane reform, there are also large-scale CO2 emissions. Thus, this research aims to develop and characterize bismuth and iron niobate-based photoanodes for hydrogen production via water photoelectrolysis. Bi2FexNbO7 films were synthesized by the sol-gel method and deposited on FTO coated glass plates by dip-coating technique. The influence of heat treatment (400, 500 and 600°C) and amount of iron on the structure (Bi2FexNbO7, x = 0, 0.8, 1, 1.2) were evaluated. Optical, structural and morphological properties were performed, as well as photoanode efficiency in photocurrent assays. The results indicate that the increase of temperature as well as the amount of iron leads to a higher absorption capacity and hence to lower band gap values. Regarding the structural properties, it was possible to observe the BFNO phase in the samples treated at 500 and 600°C. The films heat-treated at 400°C had a heterogeneous texture and a good covering. At 600°C there were some cracks in films surface. Therefore, samples with more iron and treated at 400°C showed better responses in photocurrent assays. It can be concluded that bismuth-iron niobate has a great potential to be applied in photoelectrolysis hydrogen production.
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Affiliation(s)
| | - Felipe Amorim Berutti
- Laboratory of Ceramic Materials, Department of Materials, Federal University of Rio Grande do Sul - UFRGS, Porto Alegre, Brazil
| | - Annelise Kopp Alves
- Laboratory of Ceramic Materials, Department of Materials, Federal University of Rio Grande do Sul - UFRGS, Porto Alegre, Brazil
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Chu K, Li X, Li Q, Guo Y, Zhang H. Synergistic Enhancement of Electrocatalytic Nitrogen Reduction Over Boron Nitride Quantum Dots Decorated Nb 2 CT x -MXene. Small 2021; 17:e2102363. [PMID: 34499407 DOI: 10.1002/smll.202102363] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2021] [Revised: 07/02/2021] [Indexed: 05/28/2023]
Abstract
Electrochemical N2 fixation represents a promising strategy toward sustainable NH3 synthesis, whereas the rational design of high-performance catalysts for the nitrogen reduction reaction (NRR) is urgently required but remains challenging. Herein, a novel hexagonal BN quantum dots (BNQDs) decorated Nb2 CTx -MXene (BNQDs@Nb2 CTx ) is explored as an efficient NRR catalyst. BNQDs@Nb2 CTx presents the optimum NRR activity with an NH3 yield rate of 66.3 µg h-1 mg-1 (-0.4 V) and a Faradaic efficiency of 16.7% (-0.3 V), outperforming most of the state-of-the-art NRR catalysts, together with an excellent stability. Theoretical calculations revealed that the synergistic interplay of BNQDs and Nb2 CTx enabled the creation of unique interfacial B sites serving as NRR catalytic centers capable of enhancing the N2 activation, lowering the reaction energy barrier and impeding the H2 evolution.
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Affiliation(s)
- Ke Chu
- School of Materials Science and Engineering, Lanzhou Jiaotong University, Lanzhou, 730070, China
| | - Xingchuan Li
- School of Materials Science and Engineering, Lanzhou Jiaotong University, Lanzhou, 730070, China
| | - Qingqing Li
- School of Materials Science and Engineering, Lanzhou Jiaotong University, Lanzhou, 730070, China
| | - Yali Guo
- School of Materials Science and Engineering, Lanzhou Jiaotong University, Lanzhou, 730070, China
| | - Hu Zhang
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, China
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Ali RF, Guo I, Kang H, Radford MJ, Yapp DT, Gates BD. Tuning the Surface Chemistry of Second-Harmonic-Active Lithium Niobate Nanoprobes Using a Silanol-Alcohol Condensation Reaction. Langmuir 2021; 37:7689-7700. [PMID: 34128677 DOI: 10.1021/acs.langmuir.1c00645] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The surface functionalization of nanoparticles (NPs) is of great interest for improving the use of NPs in, for example, therapeutic and diagnostic applications. The conjugation of specific molecules with NPs through the formation of covalent linkages is often sought to provide a high degree of colloidal stability and biocompatibility, as well as to provide functional groups for further surface modification. NPs of lithium niobate (LiNbO3) have been explored for use in second-harmonic-generation (SHG)-based bioimaging, expanding the applications of SHG-based microscopy techniques. The efficient use of SHG-active LiNbO3 NPs as probes will, however, require the functionalization of their surfaces with molecular reagents such as polyethylene glycol and fluorescent molecules to enhance their colloidal and chemical stability and to enable a correlative imaging platform. Herein, we demonstrate the surface functionalization of LiNbO3 NPs through the covalent attachment of alcohol-based reagents through a silanol-alcohol condensation reaction. Alcohol-based reagents are widely available and can have a range of terminal functional groups such as carboxylic acids, amines, and aldehydes. Attaching these molecules to NPs through the silanol-alcohol condensation reaction could diversify the reagents available to modify NPs, but this reaction pathway must first be established as a viable route to modifying NPs. This study focuses on the attachment of a linear alcohol functionalized with carboxylic acid and its use as a reactive group to further tune the surface chemistry of LiNbO3 NPs. These carboxylic acid groups were reacted to covalently attach other molecules to the NPs using copper-free click chemistry. This derivatization of the NPs provided a means to covalently attach polyethylene glycols and fluorescent probes to the NPs, reducing NP aggregation and enabling multimodal tracking of SHG nanoprobes, respectively. This extension of the silanol-alcohol condensation reaction to functionalize the surfaces of LiNbO3 NPs can be extended to other types of nanoprobes for use in bioimaging, biosensing, and photodynamic therapies.
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Affiliation(s)
- Rana Faryad Ali
- Department of Chemistry and 4D LABS, Simon Fraser University, 8888 University Drive, Burnaby, British Columbia V5A 1S6, Canada
| | - Iris Guo
- Department of Chemistry and 4D LABS, Simon Fraser University, 8888 University Drive, Burnaby, British Columbia V5A 1S6, Canada
| | - Henry Kang
- Department of Chemistry and 4D LABS, Simon Fraser University, 8888 University Drive, Burnaby, British Columbia V5A 1S6, Canada
| | - Melissa J Radford
- Department of Chemistry and 4D LABS, Simon Fraser University, 8888 University Drive, Burnaby, British Columbia V5A 1S6, Canada
| | - Donald T Yapp
- British Columbia Cancer Agency, 675 West 10th Avenue, Vancouver BC V5Z 1L3, Canada
| | - Byron D Gates
- Department of Chemistry and 4D LABS, Simon Fraser University, 8888 University Drive, Burnaby, British Columbia V5A 1S6, Canada
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Khan SU, Hussain S, Perini JAL, Khan H, Khan S, Zanoni MVB. Self-doping of Nb 2O 5NC by cathodic polarization for enhanced conductivity properties and photoelectrocatalytic performance. Chemosphere 2021; 272:129880. [PMID: 33601209 DOI: 10.1016/j.chemosphere.2021.129880] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2020] [Revised: 01/06/2021] [Accepted: 02/03/2021] [Indexed: 06/12/2023]
Abstract
A simple novel electrochemical reduction approach was developed for the self-doping of Nb4+ in niobium oxide nanochannels (Nb2O5NC), changing the conductivity, optical properties, and photocatalytic properties of the material. Nb2O5NC was synthesized using different electrolytes: 0.4 wt% HF in 1 M H2SO4 (EI), 0.4 M NH4F in glycerol (EII), and 0.25 g NH4F with 4 vol% water in glycol at 50 °C (EIII). Field emission scanning electron microscopy (FEG-SEM) analysis showed well-organized arrays of Nb2O5 nanochannels produced on Nb foil, with varying tube diameters in the order EII < EI < EIII and film thickness in the order EI < EII < EIII, which drastically affected the photocurrent vs. potential curves. In order to self-dope the Nb2O5, the samples were electrochemically reduced in 0.1 M KH2PO4 buffer solution (pH 10) for 5 min, at -2.5 V vs. Ag/AgCl, resulting in the doped samples denoted P-EI, P-EII, and P-EIII. The results showed that reduction of Nb5+ to Nb4+ occurred for all the Nb2O5NC samples, leading to decreased surface charge transfer resistance between the Nb2O5NC and the electrolyte, as well as increases of the charge carrier density and photocurrent for all the self-doped samples, compared to undoped samples. Sample P-EI was also tested for the degradation of reactive red 120 (RR120) dye, achieving efficient photoelectrocatalytic degradation of a 10 mg L-1 dye solution. These results reveal that the self-doping approach can enhance the photoelectrocatalytic properties of Nb2O5 photoanode, offering an alternative way for the removal of reactive dyes.
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Affiliation(s)
- Saad Ullah Khan
- Faculty of Materials and Chemical Engineering, GIK Institute of Engineering Sciences and Technology, Topi, KP, Pakistan; São Paulo State University (UNESP), Institute of Chemistry, Rua Prof. Francisco Degni 55, Araraquara, SP, 14800-060, Brazil; National Institute for Alternative Technologies of Detection, Toxicological Evaluation, and Removal of Micropollutants and Radioactives (INCT-DATREM), São Paulo State University (UNESP), Institute of Chemistry, Araraquara, SP, 14800-060, Brazil
| | - Sajjad Hussain
- Faculty of Materials and Chemical Engineering, GIK Institute of Engineering Sciences and Technology, Topi, KP, Pakistan
| | - João Angelo Lima Perini
- São Paulo State University (UNESP), Institute of Chemistry, Rua Prof. Francisco Degni 55, Araraquara, SP, 14800-060, Brazil; National Institute for Alternative Technologies of Detection, Toxicological Evaluation, and Removal of Micropollutants and Radioactives (INCT-DATREM), São Paulo State University (UNESP), Institute of Chemistry, Araraquara, SP, 14800-060, Brazil.
| | - Hammad Khan
- Faculty of Materials and Chemical Engineering, GIK Institute of Engineering Sciences and Technology, Topi, KP, Pakistan
| | - Sabir Khan
- São Paulo State University (UNESP), Institute of Chemistry, Rua Prof. Francisco Degni 55, Araraquara, SP, 14800-060, Brazil; National Institute for Alternative Technologies of Detection, Toxicological Evaluation, and Removal of Micropollutants and Radioactives (INCT-DATREM), São Paulo State University (UNESP), Institute of Chemistry, Araraquara, SP, 14800-060, Brazil
| | - Maria Valnice Boldrin Zanoni
- São Paulo State University (UNESP), Institute of Chemistry, Rua Prof. Francisco Degni 55, Araraquara, SP, 14800-060, Brazil; National Institute for Alternative Technologies of Detection, Toxicological Evaluation, and Removal of Micropollutants and Radioactives (INCT-DATREM), São Paulo State University (UNESP), Institute of Chemistry, Araraquara, SP, 14800-060, Brazil
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Domingues FS, Geraldino HCL, Freitas TKFDS, de Almeida CA, Figueiredo FFD, Garcia JC. Photocatalytic degradation of real textile wastewater using carbon black-Nb 2O 5 composite catalyst under UV/Vis irradiation. Environ Technol 2021; 42:2335-2349. [PMID: 31852357 DOI: 10.1080/09593330.2019.1701565] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2019] [Accepted: 12/02/2019] [Indexed: 06/10/2023]
Abstract
This work investigated the impregnation of Nb2O5 into carbon black (CB) in different ratios and its effect in photocatalytic degradation of real wastewater from a dyeing factory by advanced oxidative processes (AOP). Synthesized catalysts were characterized regarding their crystalline structure (DRX, micro-Raman), morphology (MEV), textural (BET area) and optical properties (bandgap energy by diffuse reflectance) and pH at the point of zero charge (pHpzc). Preliminary tests showed better photodegradation results in the acidic medium after 5 h of irradiation with NCB-0.5 (Nb2O5:CB 0.5:1). Treatment parameters optimization was carried out using response surface methodology based on Box-Behnken experimental design. Catalyst concentration, solution pH and irradiation time were varied, analysing absorbance reduction (285 and 574 nm), COD and TOC removal after treatment as responses. The composite catalyst showed improved photocatalytic activity, attributed to an increase in adsorption capacity and the bandgap narrowing, redshifting the absorption edge wavelength to the visible region, brought by CB impregnation. Optimal conditions were found at 0.250 g L-1 of catalyst, pH 2.0 and 5 h of irradiation, removing 72.19% and 93.52% of absorbance in 285 and 574 nm, respectively, 51.29% of COD and 70.70% of TOC using NCB-0.5.
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Paris EC, Malafatti JOD, Sciena CR, Junior LFN, Zenatti A, Escote MT, Moreira AJ, Freschi GPG. Nb 2O 5 nanoparticles decorated with magnetic ferrites for wastewater photocatalytic remediation. Environ Sci Pollut Res Int 2021; 28:23731-23741. [PMID: 33097995 DOI: 10.1007/s11356-020-11262-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Accepted: 10/13/2020] [Indexed: 06/11/2023]
Abstract
Nanotechnology has been studied on environmental remediation processes to foster greater photocatalysts efficiency and reuse in wastewater. This study investigated the photocatalytic efficiency and viability of niobium pentoxide (Nb2O5) nanoparticles decorated with magnetic ferrite (cobalt ferrite (CoFe2O4) or magnesium ferrite (MgFe2O4)) for atrazine photodegradation. Thus, the decorated Nb2O5 was synthesized by the polymeric precursor method, forming nanoparticles with sizes ranging from 25 to 50 nm. Nanocomposite elementary analyses showed a homogeneous distribution of elements on all particles surface. Efficient magnetic saturation was observed for pure CoFe2O4 (53 emu g-1) and MgFe2O4 (19 emu g-1) nanoparticles, promoting the magnetic removal of Nb2O5:CoFe2O4 and Nb2O5:MgFe2O4 nanocomposites. Photocatalytic assays showed 88% efficiency for atrazine photodegradation with all nanomaterials, which represented a 21% increase compared to photolysis in the 1st cycle. The magnetic nanocomposites when applied to a 5th cycle maintained the atrazine photodegradation activity. In this way, magnetic Nb2O5-based nanocomposites decorated with ferrite nanoparticles showed an efficient photocatalytic response, in addition to posterior magnetic removal from the aqueous medium. Therefore, the evaluated magnetic Nb2O5 nanocomposites may be an alternative to enhance the wastewater removal process and foster the reuse in advanced oxidative processes.
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Affiliation(s)
- Elaine Cristina Paris
- Nanotechnology National Laboratory for Agriculture (LNNA), Embrapa Instrumentação, Rua XV de Novembro, 1452, CP 741, São Carlos, SP, 13560-970, Brazil.
| | - João Otávio Donizette Malafatti
- Nanotechnology National Laboratory for Agriculture (LNNA), Embrapa Instrumentação, Rua XV de Novembro, 1452, CP 741, São Carlos, SP, 13560-970, Brazil
- Department of Chemistry, Federal University of São Carlos, Via Washington Luiz, km 235, São Carlos, SP, 13565-905, Brazil
| | - Camila Rodrigues Sciena
- Nanotechnology National Laboratory for Agriculture (LNNA), Embrapa Instrumentação, Rua XV de Novembro, 1452, CP 741, São Carlos, SP, 13560-970, Brazil
- Department of Chemistry, Federal University of São Carlos, Via Washington Luiz, km 235, São Carlos, SP, 13565-905, Brazil
| | - Luiz Ferreira Neves Junior
- Nanotechnology National Laboratory for Agriculture (LNNA), Embrapa Instrumentação, Rua XV de Novembro, 1452, CP 741, São Carlos, SP, 13560-970, Brazil
- Department of Chemistry, Federal University of São Carlos, Via Washington Luiz, km 235, São Carlos, SP, 13565-905, Brazil
| | - Alessandra Zenatti
- Federal University of ABC (UFABC), Av. dos Estados, 5001, Santo André, SP, 09210-170, Brazil
| | - Márcia Tsuyama Escote
- Federal University of ABC (UFABC), Av. dos Estados, 5001, Santo André, SP, 09210-170, Brazil
| | - Ailton José Moreira
- Department of Chemistry, Federal University of São Carlos, Via Washington Luiz, km 235, São Carlos, SP, 13565-905, Brazil
| | - Gian Paulo Giovanni Freschi
- Instituto de Ciência e Tecnologia, Federal University of Alfenas, Rod. José Aurélio Vilela, km 533, Poços de Caldas, MG, 37715-400, Brazil
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David GF, Pereira SDPS, Fernandes SA, Cubides-Roman DC, Siqueira RK, Perez VH, Lacerda V. Fast pyrolysis as a tool for obtaining levoglucosan after pretreatment of biomass with niobium catalysts. Waste Manag 2021; 126:274-282. [PMID: 33784571 DOI: 10.1016/j.wasman.2021.03.016] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2021] [Revised: 03/01/2021] [Accepted: 03/15/2021] [Indexed: 06/12/2023]
Abstract
Levoglucosan (LGA) is a promising chemical platform derived from the pyrolysis of biomass that offers access to a variety of value-added products. We report an efficient route to produce LGA via the pretreatment of biomass with niobium compounds (oxalate, chloride and oxide) followed by fast pyrolysis coupled with gas chromatography-mass spectrometry (Py-GC-MS) at temperatures of 350-600 °C. Catalytic pretreatment reduces the quantity of lignin in the biomass, concentrates the cellulose and enhance LGA formation during fast pyrolysis. The pretreatment also removes alkaline metals, preventing competitive side reactions. The effect of several parameters such as catalyst weight, time, temperature, and solvent, with the optimal pretreatment conditions determined to be 3 (wt.%) niobium oxalate for 1 h at 23 °C in water. Pretreatment increased the LGA yields by 6.40-fold for sugarcane bagasse, 4.15-fold for elephant grass, 4.13-fold for rice husk, 2.86-fold for coffee husk, and 1.86-fold for coconut husk as compared to the raw biomasses. These results indicate that biomass pretreatment using niobium derivates prior fast pyrolysis can be a promising technique for biomass thermochemical conversion in LGA and others important pyrolytic products.
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Affiliation(s)
- Geraldo Ferreira David
- Laboratório de Química Orgânica, Departamento de Química, Universidade Federal do Espírito Santo (UFES), Avenida Fernando Ferrari, 514, Goiabeiras, Vitória, ES 29075-910, Brazil
| | - Sarah de Paiva Silva Pereira
- Grupo de Química Supramolecular e Biomimética (GQSB), Departamento de Química, Universidade Federal de Viçosa, Viçosa, MG 36570-900, Brazil
| | - Sergio Antonio Fernandes
- Grupo de Química Supramolecular e Biomimética (GQSB), Departamento de Química, Universidade Federal de Viçosa, Viçosa, MG 36570-900, Brazil
| | - Diana Catalina Cubides-Roman
- Laboratório de Química Orgânica, Departamento de Química, Universidade Federal do Espírito Santo (UFES), Avenida Fernando Ferrari, 514, Goiabeiras, Vitória, ES 29075-910, Brazil
| | - Rogério Krohling Siqueira
- Laboratório de Química Orgânica, Departamento de Química, Universidade Federal do Espírito Santo (UFES), Avenida Fernando Ferrari, 514, Goiabeiras, Vitória, ES 29075-910, Brazil
| | - Victor Haber Perez
- Center of Sciences and Agricultural Technologies, State University of Northern of Rio de Janeiro, RJ 28013-602, Brazil
| | - Valdemar Lacerda
- Laboratório de Química Orgânica, Departamento de Química, Universidade Federal do Espírito Santo (UFES), Avenida Fernando Ferrari, 514, Goiabeiras, Vitória, ES 29075-910, Brazil.
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Cui C, Guo R, Ren E, Xiao H, Lai X, Qin Q, Jiang S, Shen H, Zhou M, Qin W. Facile hydrothermal synthesis of rod-like Nb 2O 5/Nb 2CT x composites for visible-light driven photocatalytic degradation of organic pollutants. Environ Res 2021; 193:110587. [PMID: 33307080 DOI: 10.1016/j.envres.2020.110587] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2020] [Revised: 10/30/2020] [Accepted: 12/02/2020] [Indexed: 06/12/2023]
Abstract
The MXene-based transition metal oxide composite is a potential candidate for photocatalysts. Rod-like pseudohexagonal phase Nb2O5/Nb2CTx composites were synthesized by a simple hydrothermal oxidation of 2D layered Nb2CTx. The Nb2O5/Nb2CTx composites show superior photocatalytic activity for 98.5% of degradation of Rhodamine B (RhB) for 120 min and 91.2% of tetracycline hydrochloride (TC-HCl) for 180 min under visible light irradiation. The Schottky junction is formed between Nb2O5 nanorods and Nb2CTx and the photo-generated carriers are effectively separated, enhancing the photocatalytic activity of the Nb2O5/Nb2CTx. High photoactivity and cycle stability of Nb2O5/Nb2CTx composites indicate that hydrothermal oxidation of 2D layered Nb2CTx is an alternative to prepare efficient photocatalyst for degradation of organic pollutants.
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Affiliation(s)
- Ce Cui
- College of Biomass Science and Engineering, Sichuan University, Chengdu, 610065, China
| | - Ronghui Guo
- College of Biomass Science and Engineering, Sichuan University, Chengdu, 610065, China.
| | - Erhui Ren
- College of Biomass Science and Engineering, Sichuan University, Chengdu, 610065, China
| | - Hongyan Xiao
- College of Biomass Science and Engineering, Sichuan University, Chengdu, 610065, China
| | - Xiaoxu Lai
- College of Biomass Science and Engineering, Sichuan University, Chengdu, 610065, China
| | - Qin Qin
- College of Biomass Science and Engineering, Sichuan University, Chengdu, 610065, China
| | - Shouxiang Jiang
- Institute of Textiles and Clothing, The Hong Kong Polytechnic University, Kowloon, Hong Kong, China
| | - Hong Shen
- College of Biomass Science and Engineering, Sichuan University, Chengdu, 610065, China
| | - Mi Zhou
- College of Biomass Science and Engineering, Sichuan University, Chengdu, 610065, China
| | - Wenfeng Qin
- Aviation Engineering Institute, Civil Aviation Flight University of China, Guanghan, China
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47
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Yang C, Luo Y, Lin H, Ge M, Shi J, Zhang X. Niobium Carbide MXene Augmented Medical Implant Elicits Bacterial Infection Elimination and Tissue Regeneration. ACS Nano 2021; 15:1086-1099. [PMID: 33372766 DOI: 10.1021/acsnano.0c08045] [Citation(s) in RCA: 81] [Impact Index Per Article: 27.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Incurable bacterial infections, impenetrable microbial biofilm, and irreversible antibiotic resistance are among the most dangerous threats for humans. With few effective strategies available in antimicrobial and antibiofilm development, innovative methodologies inspired by the advances in other fields such as nanomedicine are becoming more and more attractive to realize innovative antibacterial agents. Herein, a 2D niobium carbide (Nb2C) MXene titanium plate (Nb2C@TP)-based clinical implant with practical multimodal anti-infection functions was developed. Such emerging modes are capable of destroying biofilms for direct bacteria elimination through down-regulating bacterial energy metabolism pathways, suppressing biofilm formation, and enhancing as-formed biofilm detachment via an activating accessory gene regulator. Another intriguing feature of this nanomedicine is the sensitization ability toward bacteria via photothermal transduction, which reduces the temperature necessary for bacteria eradication and mitigates possible normal tissue damage. Moreover, the Nb2C@TP medical implant is able to alleviate proinflammatory responses by scavenging excessive reactive oxygen species in infectious microenvironments, benefiting angiogenesis and tissue remodeling.
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Affiliation(s)
- Chuang Yang
- Department of Orthopaedics, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai Jiao Tong University, Shanghai 200233, P.R. China
| | - Yao Luo
- Department of Orthopaedics, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai Jiao Tong University, Shanghai 200233, P.R. China
| | - Han Lin
- State Key Laboratory of High Performance Ceramics and Superfine Microstructures, Shanghai Institute of Ceramics Chinese Academy of Sciences, Shanghai 200050, P.R. China
| | - Min Ge
- State Key Laboratory of High Performance Ceramics and Superfine Microstructures, Shanghai Institute of Ceramics Chinese Academy of Sciences, Shanghai 200050, P.R. China
| | - Jianlin Shi
- State Key Laboratory of High Performance Ceramics and Superfine Microstructures, Shanghai Institute of Ceramics Chinese Academy of Sciences, Shanghai 200050, P.R. China
| | - Xianlong Zhang
- Department of Orthopaedics, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai Jiao Tong University, Shanghai 200233, P.R. China
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D'Ambrosi R, Nuara A, Mariani I, Di Feo F, Ursino N, Hirschmann M. Titanium Niobium Nitride Mobile-Bearing Unicompartmental Knee Arthroplasty Results in Good to Excellent Clinical and Radiographic Outcomes in Metal Allergy Patients With Medial Knee Osteoarthritis. J Arthroplasty 2021; 36:140-147.e2. [PMID: 32773267 DOI: 10.1016/j.arth.2020.07.028] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Revised: 07/05/2020] [Accepted: 07/11/2020] [Indexed: 02/02/2023] Open
Abstract
BACKGROUND The main purpose of the present study was to analyze the clinical and radiological outcomes of patients with positive skin patch tests who underwent medial mobile-bearing titanium niobium nitride unicompartmental knee arthroplasty (UKA) during a mid-term follow-up. METHODS Thirty-seven patients with positive skin patch tests were included in this prospective study. The clinical evaluation consisted of Oxford Knee Score and Knee Society Score (KSS) reports. Each patient was clinically evaluated the day before surgery (T0) as well as at T1 (11.9 ± 1.3 months) and during the final follow-up T2 (67.2 ± 19.1 months). The positioning of the UKA was evaluated during the final follow-up using standardized radiographs (T2: 67.2 ± 19.1 months). RESULTS Oxford and KSS ranged from a respective mean preoperative value of 23.0 ± 2.7 and 51.5 ± 5.0 to 42.1 ± 1.7 and 87.6 ± 2.2, respectively, at T1 (P < .001) and to the final values of 45.0 ± 1.9 and 91.9 ± 3.4, respectively, at T2 (P < .001 both vs T1 and T2). At T2, the mean femoral angle was 7.0° ± 4.5°, mean tibial angle was 3.0° ± 2.1°, and mean tibial slope was 5.1° ± 3.2°. A significant difference was found between KSS and Oxford with ANOVA for repeated measures over time (P < .001). The Oxford and KSS scores showed significant improvements during each follow-up. No complications were found, and not a single patient required a revision surgery during the follow-up period. CONCLUSION The hypoallergenic titanium niobium nitride mobile-bearing UKA showed comparable results to standard CoCr UKA regardless of the gender, age, BMI, and implant size of metal allergy patients with medial knee osteoarthritis. Careful patient selection processes and accurate medical histories played key roles in the choice of hypersensitivity-friendly implants.
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Affiliation(s)
| | - Alessandro Nuara
- IRCCS Istituto Ortopedico Galeazzi, Milan, Italy; Università degli Studi di Milano, Milan, Italy
| | | | | | | | - Michael Hirschmann
- Department of Orthopaedic Surgery and Traumatology, Kantonsspital Baselland, Baselland, Switzerland
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Herbster M, Döring J, Nohava J, Lohmann CH, Halle T, Bertrand J. Retrieval study of commercially available knee implant coatings TiN, TiNbN and ZrN on TiAl6V4 and CoCr28Mo6. J Mech Behav Biomed Mater 2020; 112:104034. [PMID: 32871541 DOI: 10.1016/j.jmbbm.2020.104034] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2020] [Revised: 07/21/2020] [Accepted: 08/10/2020] [Indexed: 12/13/2022]
Abstract
BACKGROUND Coated implant components for total knee arthroplasties are primarily used for metal-sensitive patients and are offered by different manufacturers. However, there is only little knowledge with respect to their coating design and supposed superior tribological performance. Our aim was to compare retrieved coated implants by identifying present damages, critical factors influencing the coating durability and their correlation to the clinical performance. MATERIALS AND METHODS 28 retrieved knee endoprostheses from nine different manufacturers were analyzed for potential surface defects as well as the coating strategy for each manufacturer. The coating designs were investigated on preserved regions with regard to substrate and coating material, layer thickness and roughness using scanning electron microscopy and confocal microscopy. Furthermore, the mechanical properties and adhesive strength of the layer were evaluated by nanoindentation and scratch testing. The friction performance of the coatings against ultra-high molecular weight polyethylene (UHMWPE) was investigated in a tribological test. In addition, clinical data were collected and evaluated for all patients. RESULTS Our cohort of 28 retrieved knee endoprostheses exhibited different damage patterns in the articulating area with an incidence of 79% for discoloration and 21% for coating delamination. All coatings presented droplets, macropores and pinholes in preserved areas, which can be attributed to the coating and post-polishing processes. Interestingly, the adhesive strength was significantly increased by 60.4% for titanium nitride coatings on TiAl6V4 alloy in comparison to CoCr28Mo6 substrates. The friction behavior of titanium nitride coatings against UHMWPE is similar to uncoated CoCr28Mo6 alloy and lowest for the ZrN multi-layer coating with a reduction of 14%. DISCUSSION This study shows that manufacturing related coating deposition defects can cause wear due to adhesive failure and corrosion underneath the coating layers. Adhesive strength was identified as a critical factor for coating durability. Minor adhesive strength was present on CoCr28Mo6 cast alloy in comparison to good adhesion of Ti-based coatings on TiAl6V4 wrought alloy. Based on our findings, this is consistent to higher prevalence rates of CoCr28Mo6/TiNbN coatings for gross delamination and pitting damage with increasing implantation time.
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Affiliation(s)
- Maria Herbster
- Institute of Materials and Joining Technology, Otto-von-Guericke University, Magdeburg, Germany.
| | - Joachim Döring
- Department of Orthopaedic Surgery, Otto-von-Guericke University, Magdeburg, Germany
| | | | - Christoph H Lohmann
- Department of Orthopaedic Surgery, Otto-von-Guericke University, Magdeburg, Germany
| | - Thorsten Halle
- Institute of Materials and Joining Technology, Otto-von-Guericke University, Magdeburg, Germany
| | - Jessica Bertrand
- Department of Orthopaedic Surgery, Otto-von-Guericke University, Magdeburg, Germany
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50
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Shani L, Michelson AN, Minevich B, Fleger Y, Stern M, Shaulov A, Yeshurun Y, Gang O. DNA-assembled superconducting 3D nanoscale architectures. Nat Commun 2020; 11:5697. [PMID: 33173061 PMCID: PMC7656258 DOI: 10.1038/s41467-020-19439-9] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2020] [Accepted: 10/01/2020] [Indexed: 12/13/2022] Open
Abstract
Studies of nanoscale superconducting structures have revealed various physical phenomena and led to the development of a wide range of applications. Most of these studies concentrated on one- and two-dimensional structures due to the lack of approaches for creation of fully engineered three-dimensional (3D) nanostructures. Here, we present a 'bottom-up' method to create 3D superconducting nanostructures with prescribed multiscale organization using DNA-based self-assembly methods. We assemble 3D DNA superlattices from octahedral DNA frames with incorporated nanoparticles, through connecting frames at their vertices, which result in cubic superlattices with a 48 nm unit cell. The superconductive superlattice is formed by converting a DNA superlattice first into highly-structured 3D silica scaffold, to turn it from a soft and liquid-environment dependent macromolecular construction into a solid structure, following by its coating with superconducting niobium (Nb). Through low-temperature electrical characterization we demonstrate that this process creates 3D arrays of Josephson junctions. This approach may be utilized in development of a variety of applications such as 3D Superconducting Quantum interference Devices (SQUIDs) for measurement of the magnetic field vector, highly sensitive Superconducting Quantum Interference Filters (SQIFs), and parametric amplifiers for quantum information systems.
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Affiliation(s)
- Lior Shani
- Institute of Superconductivity, Department of Physics, Bar-Ilan University, 5290002, Ramat-Gan, Israel
- Bar-Ilan Institute of Nanotechnology and Advanced Materials (BINA), 5290002, Ramat-Gan, Israel
| | - Aaron N Michelson
- Department of Applied Physics and Applied Mathematics, Columbia University, New York, NY, 10027, USA
| | - Brian Minevich
- Department of Chemical Engineering, Columbia University, New York, NY, 10027, USA
| | - Yafit Fleger
- Bar-Ilan Institute of Nanotechnology and Advanced Materials (BINA), 5290002, Ramat-Gan, Israel
| | - Michael Stern
- Quantum Nanoelectronics Laboratory, Department of Physics, Bar-Ilan University, 5290002, Ramat-Gan, Israel
| | - Avner Shaulov
- Institute of Superconductivity, Department of Physics, Bar-Ilan University, 5290002, Ramat-Gan, Israel
- Bar-Ilan Institute of Nanotechnology and Advanced Materials (BINA), 5290002, Ramat-Gan, Israel
| | - Yosef Yeshurun
- Institute of Superconductivity, Department of Physics, Bar-Ilan University, 5290002, Ramat-Gan, Israel.
- Bar-Ilan Institute of Nanotechnology and Advanced Materials (BINA), 5290002, Ramat-Gan, Israel.
| | - Oleg Gang
- Department of Applied Physics and Applied Mathematics, Columbia University, New York, NY, 10027, USA.
- Department of Chemical Engineering, Columbia University, New York, NY, 10027, USA.
- Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, NY, 11973, USA.
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