1
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Ospina-Acevedo F, Albiter LA, Bailey KO, Godínez-Salomón JF, Rhodes CP, Balbuena PB. Catalytic Activity and Electrochemical Stability of Ru 1-xM xO 2 (M = Zr, Nb, Ta): Computational and Experimental Study of the Oxygen Evolution Reaction. ACS APPLIED MATERIALS & INTERFACES 2024; 16:16373-16398. [PMID: 38502743 PMCID: PMC10995909 DOI: 10.1021/acsami.4c01408] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2024] [Accepted: 03/05/2024] [Indexed: 03/21/2024]
Abstract
We use computations and experiments to determine the effect of substituting zirconium, niobium, and tantalum within rutile RuO2 on the structure, oxygen evolution reaction (OER) mechanism and activity, and electrochemical stability. Calculated electronic structures altered by Zr, Nb, and Ta show surface regions of electron density depletion and accumulation, along with anisotropic lattice parameter shifts dependent on the substitution site, substituent, and concentration. Consistent with theory, X-ray photoelectron spectroscopy experiments show shifts in binding energies of O-2s, O-2p, and Ru-4d peaks due to the substituents. Experimentally, the substituted materials showed the presence of two phases with a majority phase that contains the metal substituent within the rutile phase and a second, smaller-percentage RuO2 phase. Our experimental analysis of OER activity shows Zr, Nb, and Ta substituents at 12.5 atom % induce lower activity relative to RuO2, which agrees with computing the average of all sites; however, Zr and Ta substitution at specific sites yields higher theoretical OER activity than RuO2, with Zr substitution suggesting an alternative OER mechanism. Metal dissolution predictions show the involvement of cooperative interactions among multiple surface sites and the electrolyte. Zr substitution at specific sites increases activation barriers for Ru dissolution, however, with Zr surface dissolution rates comparable to those of Ru. Experimental OER stability analysis shows lower Ru dissolution from synthesized RuO2 and Zr-substituted RuO2 compared to commercial RuO2 and comparable amounts of Zr and Ru dissolved from Zr-substituted RuO2, aligned with our calculations.
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Affiliation(s)
- Francisco Ospina-Acevedo
- Department
of Chemical Engineering, Texas A&M University, College Station, Texas 77843, United States
| | - Luis A. Albiter
- Materials
Science, Engineering and Commercialization Program, Texas State University, San Marcos, Texas 78666, United States
| | - Kathleen O. Bailey
- Department
of Chemistry and Biochemistry, Texas State
University, San Marcos, Texas 78666, United States
| | | | - Christopher P. Rhodes
- Materials
Science, Engineering and Commercialization Program, Texas State University, San Marcos, Texas 78666, United States
- Department
of Chemistry and Biochemistry, Texas State
University, San Marcos, Texas 78666, United States
| | - Perla B. Balbuena
- Department
of Chemical Engineering, Texas A&M University, College Station, Texas 77843, United States
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2
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Perumal SK, Lee S, Yu H, Heo J, Kang MJ, Kim Y, Park M, Lee H, Kim HS. Synergistic Interaction between Ruthenium Catalysts and Grafted Niobium on SBA-15 for 2,5-Furandicarboxylic Acid Production Using 5-Hydroxymethylfurfural. ACS APPLIED MATERIALS & INTERFACES 2024; 16:7353-7363. [PMID: 38315818 DOI: 10.1021/acsami.3c18720] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2024]
Abstract
This study entailed the synthesis of Ru nanocatalyst decorated on Nb-grafted SBA-15. A Nb-grafted SBA-15 support with varying Nb contents was utilized as a support for the Ru nanoparticles. The effect of Nb grafting on the immobilized Ru nanoparticle catalyst was systematically investigated, and its catalytic performance in the synthesis of furandicarboxylic acid using 5-hydroxymethylfurfural under base-free reaction conditions was evaluated. The results indicate the increased productivity of the Ru@Nb-grafted SBA-15 catalyst with a yield exceeding 95%, representing a significant advancement in catalysis. This study also affords insights into the complex relationship between the catalytic activity and selectivity and its unique surface attributes. Moreover, acidic sites were created, and the electron density within the active sites was modulated by monomeric Nb oxide species on the SBA-15. Additionally, the role of high-electron-density Ru atoms in facilitating the efficient adsorption and activation of the reactant, resulting in enhanced catalytic efficacy, was highlighted.
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Affiliation(s)
- Santhana Krishnan Perumal
- BB21 Plus Program, Department of Chemistry, Pukyong National University, Busan 48513, Republic of Korea
| | - Sangyeob Lee
- BB21 Plus Program, Department of Chemistry, Pukyong National University, Busan 48513, Republic of Korea
| | - Hyejin Yu
- BB21 Plus Program, Department of Chemistry, Pukyong National University, Busan 48513, Republic of Korea
| | - Jaeseong Heo
- BB21 Plus Program, Department of Chemistry, Pukyong National University, Busan 48513, Republic of Korea
| | - Myung Jong Kang
- Department of Chemistry, Gangneung-Wonju National University, Gangneung 25457, Republic of Korea
| | - Yeonjoon Kim
- BB21 Plus Program, Department of Chemistry, Pukyong National University, Busan 48513, Republic of Korea
| | - Myeongkee Park
- BB21 Plus Program, Department of Chemistry, Pukyong National University, Busan 48513, Republic of Korea
| | - Hangil Lee
- Department of Chemistry, Sookmyung Women's University, Seoul 04310, Republic of Korea
| | - Hyun Sung Kim
- BB21 Plus Program, Department of Chemistry, Pukyong National University, Busan 48513, Republic of Korea
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Vendra SSL, Singh G, Kumar R. New insights into the electrochemical performance of precursor derived Si(Nb)OC composites as anode materials for batteries. RSC Adv 2023; 13:27887-27897. [PMID: 37731825 PMCID: PMC10508105 DOI: 10.1039/d3ra04825j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Accepted: 08/04/2023] [Indexed: 09/22/2023] Open
Abstract
This work represents a first attempt to synthesize Si(Nb)OC ceramic composites through the polymer pyrolysis or the precursor-derived ceramics (PDC) route for use as a hybrid anode material for lithium-ion batteries (LIB). Electron microscopy, X-ray diffraction, and various spectroscopy techniques were used to examine the micro/nano structural features and phase evolution during cross-linking, pyrolysis, and annealing stages. During the polymer-to-ceramic transformation process, in situ formation of carbon (so-called "free carbon"), and crystallization of t-NbO2, NbC phases in the amorphous Si(Nb)OC ceramic matrix are identified. The first-cycle reversible capacities of 431 mA h g-1 and 256 mA h g-1 for the as-pyrolyzed and annealed Si(Nb)OC electrodes, respectively, exceeded the theoretical Li capacity of niobium pentaoxide or m-Nb2O5 (at approximately 220 mA h g-1). With an average reversible capacity of 200 mA h g-1 and close to 100% cycling efficiency, as-pyrolyzed Si(Nb)OC demonstrates good rate capability. X-ray amorphous SiOC with uniformly distributed nanosized Nb2O5 and graphitic carbon structure likely provides stability during repeated Li+ cycling and the formation of a stable secondary electrolyte interphase (SEI) layer, leading to high efficiency.
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Affiliation(s)
- S S Lokesh Vendra
- Laboratory for High Performance Ceramics, Department of Metallurgical and Materials Engineering, Indian Institute of Technology-Madras (IIT Madras) Chennai 600036 India
- Department of Mechanical and Nuclear Engineering, Kansas State University Manhattan KS 66502 USA
| | - Gurpreet Singh
- Department of Mechanical and Nuclear Engineering, Kansas State University Manhattan KS 66502 USA
| | - Ravi Kumar
- Laboratory for High Performance Ceramics, Department of Metallurgical and Materials Engineering, Indian Institute of Technology-Madras (IIT Madras) Chennai 600036 India
- Centre of Excellence on Ceramic Technologies for Futuristic Mobility, Indian Institute of Technology, Madras (IIT Madras) Chennai 600036 India
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4
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Silvestro L, Maroli C, Koch B, Ruviaro AS, Lima G, Kempka M, Marin CFDF, Mezalira DZ, Gleize PJP. Assessing the Rheological, Mechanical, and Photocatalytic Properties of Niobium Oxide-Incorporated White Cement Pastes. MATERIALS (BASEL, SWITZERLAND) 2023; 16:ma16114090. [PMID: 37297226 DOI: 10.3390/ma16114090] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2023] [Revised: 05/25/2023] [Accepted: 05/29/2023] [Indexed: 06/12/2023]
Abstract
Niobium oxide (Nb2O5) is a semiconductor that exhibits photocatalytic properties, making it potentially valuable in addressing air pollution, self-cleaning, and self-disinfection in cement-based materials (CBMs). Therefore, this study aimed to evaluate the impact of different Nb2O5 concentrations on various parameters, including rheological characteristics, hydration kinetics (measured using isothermal calorimetry), compressive strength, and photocatalytic activity, specifically in the degradation of Rhodamine B (RhB) in white Portland cement pastes. The incorporation of Nb2O5 increased the yield stress and viscosity of the pastes by up to 88.9% and 33.5%, respectively, primarily due to the larger specific surface area (SSA) provided by Nb2O5. However, this addition did not significantly affect the hydration kinetics or the compressive strength of the cement pastes after 3 and 28 days. Tests focusing on the degradation of RhB in the cement pastes revealed that the inclusion of 2.0 wt.% of Nb2O5 was insufficient to degrade the dye when exposed to 393 nm UV light. However, an interesting observation was made concerning RhB in the presence of CBMs, as it demonstrated a degradation mechanism that was not dependent on light. This phenomenon was attributed to the production of superoxide anion radicals resulting from the interaction between the alkaline medium and hydrogen peroxide.
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Affiliation(s)
- Laura Silvestro
- Coordenação de Engenharia Civil, Universidade Tecnológica Federal do Paraná (UTFPR), Guarapuava 85053-525, Brazil
| | - Caroline Maroli
- Programa de Pós-Graduação em Química, Universidade Federal de Santa Catarina (UFSC), Florianopolis 88040-900, Brazil
| | - Brenda Koch
- Programa de Pós-Graduação em Química, Universidade Federal de Santa Catarina (UFSC), Florianopolis 88040-900, Brazil
| | - Artur Spat Ruviaro
- Laboratório de Aplicação de Nanotecnologia em Construção Civil (NANOTEC), Universidade Federal de Santa Catarina (UFSC), Florianopolis 88040-900, Brazil
| | - Geannina Lima
- Laboratório de Aplicação de Nanotecnologia em Construção Civil (NANOTEC), Universidade Federal de Santa Catarina (UFSC), Florianopolis 88040-900, Brazil
| | - Mariane Kempka
- Coordenação de Engenharia Civil, Universidade Tecnológica Federal do Paraná (UTFPR), Guarapuava 85053-525, Brazil
| | | | - Daniela Zambelli Mezalira
- Programa de Pós-Graduação em Química, Universidade Federal de Santa Catarina (UFSC), Florianopolis 88040-900, Brazil
| | - Philippe Jean Paul Gleize
- Laboratório de Aplicação de Nanotecnologia em Construção Civil (NANOTEC), Universidade Federal de Santa Catarina (UFSC), Florianopolis 88040-900, Brazil
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Ciptonugroho W, Mensah JB, Al-Shaal G, Palkovits R. WOx/ZrO2 catalysts for the conversion of α-angelica lactone with butanol to butyl levulinates. CHEMICAL PAPERS 2023. [DOI: 10.1007/s11696-023-02739-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/19/2023]
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6
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Eblagon KM, Malaika A, Ptaszyńska K, Pereira MR, Kozłowski M, Figueiredo JL. “Niobium oxide-phosphorylated carbon xerogel composites as solid acid catalysts for cascade conversion of glucose to 5-hydroxymethylfurfural (HMF) in pure water”. Catal Today 2023. [DOI: 10.1016/j.cattod.2023.114070] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/09/2023]
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7
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Keerthika Devi R, Ganesan M, Chen TW, Chen SM, Akilarasan M, Shaju A, Rwei SP, Yu J, Yu YY. In-situ formation of niobium oxide – niobium carbide – reduced graphene oxide ternary nanocomposite as an electrochemical sensor for sensitive detection of anticancer drug methotrexate. J Colloid Interface Sci 2023; 643:600-612. [PMID: 37003869 DOI: 10.1016/j.jcis.2023.03.142] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Revised: 03/17/2023] [Accepted: 03/22/2023] [Indexed: 03/28/2023]
Abstract
Engineering the nanostructure of an electrocatalyst is crucial in developing a high-performance electrochemical sensor. This work exhibits the hydrothermal followed by annealing synthesis of niobium oxide/niobium carbide/reduced graphene oxide (NbO/NbC/rGO) ternary nanocomposite. The oval-shaped NbO/NbC nanoparticles cover the surface of rGO evenly, and the rGO nanosheets are interlinked to produce a micro-flower-like architecture. The NbO/NbC/rGO nanocomposite-modified electrode is presented here for the first time for the rapid and sensitive electrochemical detection of the anticancer drug methotrexate (MTX). Down-sized NbO/NbC nanoparticles and rGO's high surface area provide many active sites with a rapid electron transfer rate, making them ideal for MTX detection. In comparison to previously reported MTX sensors, the developed drug sensor exhibits a lower oxidation potential and a higher peak current responsiveness. The constructed sensors worked analytically well under optimal conditions, as shown by a low detection limit of 1.6 nM, a broad linear range of 0.1-850 µM, and significant recovery findings (∼98 %, (n = 3)) in real samples analysis. Thus, NbO/NbC/rGO nanocomposite material for high-performance electrochemical applications seems promising.
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Affiliation(s)
- Ramadhass Keerthika Devi
- Department of Chemical Engineering and Biotechnology, College of Engineering, National Taipei University of Technology, No. 1, Section 3, Chung-Hsiao East Road, Taipei 106, Taiwan
| | - Muthusankar Ganesan
- School of Energy and Environment, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong
| | - Tse-Wei Chen
- Department of Materials, Imperial College London, London SW7 2AZ, United Kingdom.
| | - Shen-Ming Chen
- Department of Chemical Engineering and Biotechnology, College of Engineering, National Taipei University of Technology, No. 1, Section 3, Chung-Hsiao East Road, Taipei 106, Taiwan.
| | - Muthumariappan Akilarasan
- Department of Chemical Engineering and Biotechnology, College of Engineering, National Taipei University of Technology, No. 1, Section 3, Chung-Hsiao East Road, Taipei 106, Taiwan
| | - Anlin Shaju
- International College of Semiconductor Technology (ICST), National Yang Ming Chiao Tung University, Taiwan
| | - Syang-Peng Rwei
- Research and Development Center for Smart Textile Technology, National Taipei University of Technology, Taipei 106, Taiwan; Institute of Organic and Polymeric Materials, National Taipei University of Technology, Taiwan
| | - Jaysan Yu
- Well Fore Special Wire Corporation, 10, Tzu-Chiang 7rd., Chung-Li Industrial Park, Taoyuan, Taiwan
| | - Yen-Yao Yu
- Department of Chemical Engineering and Biotechnology, College of Engineering, National Taipei University of Technology, No. 1, Section 3, Chung-Hsiao East Road, Taipei 106, Taiwan
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8
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Trindade ACM, Enzweiler H, Salau NPG. Modeling and optimizing the synthesis of isopropyl acetate over niobium pentoxide using experimental design methodology coupled with artificial neural network. CHEM ENG COMMUN 2023. [DOI: 10.1080/00986445.2023.2174861] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
Affiliation(s)
- Aline C. M. Trindade
- Departamento de Engenharia Química, Universidade Federal de Santa Maria, Santa Maria, Brazil
| | - Heveline Enzweiler
- Departamento de Engenharia de Alimentos e Engenharia Química, Universidade do Estado de Santa Catarina, Florianopolis, Brazil
| | - Nina P. G. Salau
- Departamento de Engenharia Química, Universidade Federal de Santa Maria, Santa Maria, Brazil
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9
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Xu W, Xu Y, Schultz T, Lu Y, Koch N, Pinna N. Heterostructured and Mesoporous Nb 2O 5@TiO 2 Core-Shell Spheres as the Negative Electrode in Li-Ion Batteries. ACS APPLIED MATERIALS & INTERFACES 2023; 15:795-805. [PMID: 36542687 DOI: 10.1021/acsami.2c15124] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Niobium pentoxides have received considerable attention and are promising anode materials for lithium-ion batteries (LIBs), due to their fast Li storage kinetics and high capacity. However, their cycling stability and rate performance are still limited owing to their intrinsic insulating properties and structural degradation during charging and discharging. Herein, a series of mesoporous Nb2O5@TiO2 core-shell spherical heterostructures have been prepared for the first time by a sol-gel method and investigated as anode materials in LIBs. Mesoporosity can provide numerous open and short pathways for Li+ diffusion; meanwhile, heterostructures can simultaneously enhance the electronic conductivity and thus improve the rate capability. The TiO2 coating layer shows robust crystalline skeletons during repeated lithium insertion and extraction processes, retaining high structural integrity and, thereby, enhancing cycling stability. The electrochemical behavior is strongly dependent on the thickness of the TiO2 layer. After optimization, a mesoporous Nb2O5@TiO2 core-shell structure with a ∼13 nm thick TiO2 layer delivers a high specific capacity of 136 mA h g-1 at 5 A g-1 and exceptional cycling stability (88.3% retention over 1000 cycles at 0.5 A g-1). This work provides a facile strategy to obtain mesoporous Nb2O5@TiO2 core-shell spherical structures and underlines the importance of structural engineering for improving the performance of battery materials.
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Affiliation(s)
- Wenlei Xu
- Institut für Chemie and IRIS Adlershof, Humboldt-Universität zu Berlin, Brook-Taylor-Str. 2, 12489 Berlin, Germany
| | - Yaolin Xu
- Department of Electrochemical Energy Storage, Helmholtz-Zentrum Berlin für Materialien und Energie, 14109 Berlin, Germany
| | - Thorsten Schultz
- Institut für Physik and IRIS Adlershof, Humboldt-Universität zu Berlin, Brook-Taylor-Str. 2, 12489 Berlin, Germany
- Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, 12489 Berlin, Germany
| | - Yan Lu
- Department of Electrochemical Energy Storage, Helmholtz-Zentrum Berlin für Materialien und Energie, 14109 Berlin, Germany
- Institute of Chemistry, University of Potsdam, Potsdam 14476, Germany
| | - Norbert Koch
- Institut für Physik and IRIS Adlershof, Humboldt-Universität zu Berlin, Brook-Taylor-Str. 2, 12489 Berlin, Germany
- Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, 12489 Berlin, Germany
| | - Nicola Pinna
- Institut für Chemie and IRIS Adlershof, Humboldt-Universität zu Berlin, Brook-Taylor-Str. 2, 12489 Berlin, Germany
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Singh N, Kalbande PN, Umbarkar S, Sudarsanam P. Efficient cascade C-N coupling reactions catalyzed by a recyclable MoOx/Nb2O5 nanomaterial for valuable N-heterocycles synthesis. MOLECULAR CATALYSIS 2022. [DOI: 10.1016/j.mcat.2022.112742] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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11
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Schardosim RFDC, Cardozo TR, de Souza AP, Seeber A, Flores WH, Lehmann M, Dihl RR. Cyto-genotoxicity of crystalline and amorphous niobium (V) oxide nanoparticles in CHO-K1 cells. Toxicol Res (Camb) 2022; 11:765-773. [PMID: 36337238 PMCID: PMC9618107 DOI: 10.1093/toxres/tfac054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2022] [Revised: 06/27/2022] [Accepted: 07/20/2022] [Indexed: 08/28/2023] Open
Abstract
Niobium (V) oxide nanoparticles (NINPs) have been widely and increasingly applied in various health products and industrial processes. This merits further study of their toxicity. Here, we investigated the potential of NINPs to induce DNA damage, cytotoxicity, and chromosome instability in cultured CHO-K1 cells. NINPs were physico-chemically characterized. As assessed by comet assay, crystalline and amorphous NINPs were genotoxic at the highest concentrations evaluated. The cytokinesis-block micronucleus assay demonstrated that a 24-h treatment with NINPs, for the crystalline and the amorphous samples, significantly reduced the nuclear division cytotoxicity index. In addition, a 4-h treatment period of crystalline NINPs increased micronucleus (MNi) frequencies. MNi, nucleoplasmic bridges and nuclear buds were detected after exposure of the cells for 24 h to crystalline NINPs. In the amorphous sample, chromosome instability was restricted to the induction of MNi, in the 24-h treatment, detected at all tested concentrations. The fluorescence and dark field microscopy demonstrated the uptake of NINPs by CHO-K1 cells and an intracellular distribution outlining the nucleus. Our data advance understanding of the cytotoxic and genotoxic effects of NINPs and should be taken into consideration when setting up guidelines for their use in industrial or health products.
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Affiliation(s)
- Raíne Fogliati De Carli Schardosim
- Laboratory of Genetic Toxicity and Cellular Toxic-Genetics Analysis, Graduate Program in Molecular and Cellular Biology Applied to Health, Lutheran University of Brazil (ULBRA), Avenida Farroupilha, 8001, 92425-900, Canoas, RS, Brazil
| | - Tatiane Rocha Cardozo
- Laboratory of Genetic Toxicity and Cellular Toxic-Genetics Analysis, Graduate Program in Molecular and Cellular Biology Applied to Health, Lutheran University of Brazil (ULBRA), Avenida Farroupilha, 8001, 92425-900, Canoas, RS, Brazil
- Research Group on Nanostructured Materials, Federal University of the Pampa, Campus Bagé, Avenida Maria Anunciação Gomes de Godoy, 1650, 96413-172, RS, Brazil
| | - Ana Paula de Souza
- Laboratory of Genetic Toxicity and Cellular Toxic-Genetics Analysis, Graduate Program in Molecular and Cellular Biology Applied to Health, Lutheran University of Brazil (ULBRA), Avenida Farroupilha, 8001, 92425-900, Canoas, RS, Brazil
| | - Allan Seeber
- Research Group on Nanostructured Materials, Federal University of the Pampa, Campus Bagé, Avenida Maria Anunciação Gomes de Godoy, 1650, 96413-172, RS, Brazil
| | - Wladimir Hernandez Flores
- Research Group on Nanostructured Materials, Federal University of the Pampa, Campus Bagé, Avenida Maria Anunciação Gomes de Godoy, 1650, 96413-172, RS, Brazil
| | - Maurício Lehmann
- Laboratory of Genetic Toxicity and Cellular Toxic-Genetics Analysis, Graduate Program in Molecular and Cellular Biology Applied to Health, Lutheran University of Brazil (ULBRA), Avenida Farroupilha, 8001, 92425-900, Canoas, RS, Brazil
| | - Rafael Rodrigues Dihl
- Laboratory of Genetic Toxicity and Cellular Toxic-Genetics Analysis, Graduate Program in Molecular and Cellular Biology Applied to Health, Lutheran University of Brazil (ULBRA), Avenida Farroupilha, 8001, 92425-900, Canoas, RS, Brazil
- Postgraduate Program in Dentistry, Lutheran University of Brazil (ULBRA), Avenida Farroupilha, 8001, 92425-900, Canoas, RS, Brazil
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12
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Fuziki MEK, Abreu E, Napoli JS, Nunes SC, Brackmann R, Machado TCS, Semianko BC, Lenzi GG. Cu/Nb 2O 5, Fe/Nb 2O 5 and Cu-Fe/Nb 2O 5 applied in salicylic acid degradation: Parameters studies and photocatalytic activity. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART A, TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING 2022; 57:797-812. [PMID: 36069164 DOI: 10.1080/10934529.2022.2117525] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2022] [Revised: 08/16/2022] [Accepted: 08/18/2022] [Indexed: 06/15/2023]
Abstract
This study describes the synthesis of Cu/Nb2O5, Fe/Nb2O5, and Cu-Fe/Nb2O5 catalysts obtained by incorporating copper and/or iron metals into niobium pentoxide (Nb2O5). The new materials were characterized by the following techniques: Thermogravimetric Analysis (TA), surface and pore analysis, X-ray diffractometry (XRD), and Fourier Transform Infrared Spectroscopy (FT-IR). The catalyst was applied in the photocatalytic degradation of salicylic acid (SA). The influence of different parameters (calcined temperature, pH, and metal addition) on the photocatalytic reaction was evaluated. The results indicated that catalysts containing copper were more active and pH influenced the SA degradation process. SA removal results indicated that Cu/Nb2O5 photocatalyst presented a 1.5 fold higher degradation after 120 min in comparison to Cu-Fe/Nb2O5 and 4.6 fold higher than Fe/Nb2O5 catalyst, all them calcined at 400 °C. In tests carried out in the presence of formic acid, increasing the pH from about 3 to 7 allowed an almost 3.4-fold increase in SA degradation for the Cu-Fe/Nb2O5 catalyst calcined at 400 °C.
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Affiliation(s)
- Maria E K Fuziki
- Department of Chemical Engineering, State University of Maringá, Maringá, PR, Brazil
| | - Eduardo Abreu
- Department of Chemical Engineering, State University of Maringá, Maringá, PR, Brazil
| | - Jose S Napoli
- Department of Chemical Engineering, Federal University of Technology - Paraná, Curitiba, PR, Brazil
| | - Sabrina C Nunes
- Department of Chemical Engineering, Federal University of Technology, Pato Branco, PR, Brazil
| | - Rodrigo Brackmann
- Department of Chemical Engineering, Federal University of Technology, Pato Branco, PR, Brazil
| | - Tauani C S Machado
- Department of Chemical Engineering, Federal University of Technology - Paraná, Curitiba, PR, Brazil
| | - Betina C Semianko
- Department of Chemical Engineering, Federal University of Technology - Paraná, Curitiba, PR, Brazil
| | - Giane G Lenzi
- Department of Chemical Engineering, Federal University of Technology - Paraná, Curitiba, PR, Brazil
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13
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Alias N, Hussain Z, Tan WK, Kawamura G, Muto H, Matsuda A, Lockman Z. Photoreduction of Cr(VI) in wastewater by anodic nanoporous Nb 2O 5 formed at high anodizing voltage and electrolyte temperature. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:60600-60615. [PMID: 35426025 DOI: 10.1007/s11356-022-20005-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2021] [Accepted: 03/27/2022] [Indexed: 06/14/2023]
Abstract
In this study, nanoporous anodic film was produced by anodization of niobium, Nb in a fluoride ethylene glycol electrolyte. The effect of anodization voltage and electrolyte temperature was studied to find an optimum condition for circular, ordered, and uniform pore formation. The diameter of the pores was found to be larger when the applied voltage was increased from 20 to 80 V. The as-anodized porous film was also observed to comprise of nanocrystallites which formed due to high field-induced crystallization. The nanocrystallites grew into orthorhombic Nb2O5 after post-annealing treatment. The Cr(VI) photoreduction property of both the as-anodized and annealed Nb2O5 samples obtained using an optimized condition (anodization voltage: 60 V, electrolyte temperature: 70 °C) was compared. Interestingly, the as-anodized Nb2O5 film was found to display better photoreduction of Cr(VI) than annealed Nb2O5. However, in terms of stability, the annealed Nb2O5 presented high photocatalytic efficiency for each cycle whereas the as-anodized Nb2O5 showed degradation in photocatalytic performance when used continually.
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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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14
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Kar AK, Srivastava R. Improving the Glucose to Fructose Isomerization via Epitaxial‐Grafting of Niobium in UIO‐66 framework. ChemCatChem 2022. [DOI: 10.1002/cctc.202200721] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
| | - Rajendra Srivastava
- Indian Institute of Technology Ropar Chemistry Nangal RoadRupnagar 140001 Rupnagar INDIA
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15
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Amjad UES, Tajjamal A, Ul-Hamid A, Faisal A, Zaidi SAH, Sherin L, Mir A, Mustafa M, Ahmad N, Hussain M, Park YK. Catalytic cracking of polystyrene pyrolysis oil: Effect of Nb 2O 5 and NiO/Nb 2O 5 catalyst on the liquid product composition. WASTE MANAGEMENT (NEW YORK, N.Y.) 2022; 141:240-250. [PMID: 35150974 DOI: 10.1016/j.wasman.2022.02.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2021] [Revised: 01/01/2022] [Accepted: 02/02/2022] [Indexed: 06/14/2023]
Abstract
The catalytic cracking of polystyrene pyrolysis oil was investigated over a Nb2O5 and a NiO/Nb2O5 catalyst in a fixed bed reactor. First, the pyrolysis of two different polystyrene feedstock (polystyrene foam and polystyrene pellet) was carried out in a semi-batch reactor, and the resulting polystyrene pellets pyrolysis oil was selected for catalytic cracking reaction because of its high liquid yield (85%). Catalytic cracking experiments were then performed at different temperatures (350-500 °C) using Nb2O5 or NiO/Nb2O5 catalyst. Gas chromatography-mass spectrometry analysis of liquid product obtained from the catalytic cracking process showed that the dimers in the pyrolysis oil were converted to monomers during the catalytic cracking process. The catalytic cracking results also showed that the NiO/Nb2O5 catalyst (having slightly higher acidic sites) had slightly higher activity for monomer conversion than the Nb2O5 catalyst (having less acidic sites). X-ray diffraction, transmission electron microscopy, pyridine Fourier transform infrared spectroscopy, NH3 Temperature Programmed Desorption and X-ray photoelectron spectroscopy were used to characterize the catalyst. The highest catalytic cracking activity was observed at 400 °C with the Nb2O5 catalyst with 4% toluene, 6% ethylbenzene, approximately 50% styrene, 13% α-methyl styrene, and only 6% of dimers in the liquid oil. The increase in temperature positively affected the yield of gases during catalytic cracking process.
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Affiliation(s)
- Um-E-Salma Amjad
- Department of Chemical Engineering, COMSATS University Islamabad, Lahore Campus, Defence Road, Off Raiwind Road, Lahore 54000, Pakistan.
| | - Arshia Tajjamal
- Department of Chemical Engineering, COMSATS University Islamabad, Lahore Campus, Defence Road, Off Raiwind Road, Lahore 54000, Pakistan
| | - Anwar Ul-Hamid
- Core Research Facilities, King Fahd University of Petroleum & Minerals, Dhahran 31261, Saudi Arabia
| | - Abrar Faisal
- Department of Chemical Engineering, COMSATS University Islamabad, Lahore Campus, Defence Road, Off Raiwind Road, Lahore 54000, Pakistan; Chemical Technology, Luleå University of Technology, 971 87 Luleå, Sweden
| | - Syed Ammar Hussain Zaidi
- Department of Chemical Engineering, COMSATS University Islamabad, Lahore Campus, Defence Road, Off Raiwind Road, Lahore 54000, Pakistan
| | - Lubna Sherin
- Department of Chemistry, COMSATS University Islamabad, Lahore Campus, Defence Road, Off Raiwind Road, Lahore 54000, Pakistan
| | - Amna Mir
- Department of Physics, COMSATS University Islamabad, Lahore Campus, Defence Road, Off Raiwind Road, Lahore 54000, Pakistan
| | - Maria Mustafa
- Department of Chemical Engineering, COMSATS University Islamabad, Lahore Campus, Defence Road, Off Raiwind Road, Lahore 54000, Pakistan
| | - Nabeel Ahmad
- Department of Chemical Engineering, COMSATS University Islamabad, Lahore Campus, Defence Road, Off Raiwind Road, Lahore 54000, Pakistan
| | - Murid Hussain
- Department of Chemical Engineering, COMSATS University Islamabad, Lahore Campus, Defence Road, Off Raiwind Road, Lahore 54000, Pakistan.
| | - Young-Kwon Park
- School of Environmental Engineering, University of Seoul, Seoul 02504, Republic of Korea.
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16
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Takagaki A, Ozaki T, Song JT, Niwa E, Watanabe M, Ishihara T. Introduction of tensile strain into titanium dioxide for increased solid acid catalytic activity. Catal Sci Technol 2022. [DOI: 10.1039/d2cy00736c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Intentionally introducing tensile strain into TiO2 by using a spark plasma sintering process could stabilize reduced Ti species and improve the solid acid activity for acetalization.
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Affiliation(s)
- Atsushi Takagaki
- Department of Applied Chemistry, Faculty of Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
- International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Taiga Ozaki
- Department of Applied Chemistry, Faculty of Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Jun Tae Song
- Department of Applied Chemistry, Faculty of Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
- International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Eiki Niwa
- International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Motonori Watanabe
- International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Tatsumi Ishihara
- Department of Applied Chemistry, Faculty of Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
- International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
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17
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Qaraah FA, Mahyoub SA, Hezam A, Qaraah A, Drmosh QA, Xiu G. Construction of 3D flowers-like O-doped g-C3N4-[N-doped Nb2O5/C] heterostructure with direct S-scheme charge transport and highly improved visible-light-driven photocatalytic efficiency. CHINESE JOURNAL OF CATALYSIS 2022. [DOI: 10.1016/s1872-2067(21)64038-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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18
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Trindade ACM, Enzweiler H, Salau NPG. New insights into reaction-diffusion kinetic coupling in the esterification of acetic acid with isopropanol over niobium pentoxide. CHEM ENG COMMUN 2021. [DOI: 10.1080/00986445.2021.2009810] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
| | - Heveline Enzweiler
- Departamento de Engenharia de Alimentos e Engenharia Química, Universidade do Estado de Santa Catarina, Brazil
| | - Nina P. G. Salau
- Departamento de Engenharia Química, Universidade Federal de Santa Maria, Brazil
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19
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Hajduk B, Bednarski H, Jarka P, Janeczek H, Godzierz M, Tański T. Thermal and optical properties of PMMA films reinforced with Nb 2O 5 nanoparticles. Sci Rep 2021; 11:22531. [PMID: 34795332 PMCID: PMC8602437 DOI: 10.1038/s41598-021-01282-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2021] [Accepted: 10/20/2021] [Indexed: 11/25/2022] Open
Abstract
The article presents the thermal and physical properties of PMMA composite films with the addition of Nb2O5 nanoparticles. The addition of nanoparticles to PMMA mainly influenced the optical transmission and glass transition temperature of composite films compared to pure PMMA. It is clearly visible in the results of the conducted ellipsometric and differential scanning calorimetry tests. X-ray studies showed that the heat treatment of the samples resulted in the ordering of the polymer structure (flattening of the polymer chains). Examining the surface of the samples with scanning electron microscopy, it can be seen that Nb2O5 nanoparticles formed unusual, branched formations resembling "snowflakes".
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Affiliation(s)
- B Hajduk
- Centre of Polymer and Carbon Materials, Polish Academy of Sciences, 34 Marie Curie-Skłodowska str., 41-819, Zabrze, Poland.
| | - H Bednarski
- Centre of Polymer and Carbon Materials, Polish Academy of Sciences, 34 Marie Curie-Skłodowska str., 41-819, Zabrze, Poland
| | - P Jarka
- Department of Engineering Materials and Biomaterials, Silesian University of Technology, 18a Konarskiego str., 41-100, Gliwice, Poland.
| | - H Janeczek
- Centre of Polymer and Carbon Materials, Polish Academy of Sciences, 34 Marie Curie-Skłodowska str., 41-819, Zabrze, Poland
| | - M Godzierz
- Centre of Polymer and Carbon Materials, Polish Academy of Sciences, 34 Marie Curie-Skłodowska str., 41-819, Zabrze, Poland
| | - T Tański
- Department of Engineering Materials and Biomaterials, Silesian University of Technology, 18a Konarskiego str., 41-100, Gliwice, Poland
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20
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Incorporating Nb into MoSe
2
Nanoflowers for Overall Electrocatalytic Water Splitting. Isr J Chem 2021. [DOI: 10.1002/ijch.202100055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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21
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Phosphate Enrichment of Niobium-Based Catalytic Surfaces in Relation to Reactions of Carbohydrate Biomass Conversion: The Case Studies of Inulin Hydrolysis and Fructose Dehydration. Catalysts 2021. [DOI: 10.3390/catal11091077] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
In this work, some physical mixtures of Nb2O5·nH2O and NbOPO4 were prepared to study the role of phosphate groups in the total acidity of samples and in two reactions involving carbohydrate biomass: hydrolysis of polyfructane and dehydration of fructose/glucose to 5-hydroxymethylfurfural (HMF). The acid and catalytic properties of the mixtures were dominated by the phosphate group enrichment. Lewis and Brønsted acid sites were detected by FT-IR experiments with pyridine adsorption/desorption under dry and wet conditions. Lewis acidity decreased with NbP in the composition, while total acidity of the samples, measured by titrations with phenylethylamine in cyclohexane (~3.5 μeq m−2) and water (~2.7 μeq m−2), maintained almost the same values. Inulin conversion took advantage of the presence of surfaces rich in Brønsted sites, and NbOPO4 showed the best hydrolysis activity with glucose/fructose formation. The catalyst with a more phosphated surface showed less deactivation during the dehydration of fructose/glucose into HMF.
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22
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Csiszár G, Lawitzki R, Everett C, Schmitz G. Elastic Behavior of Nb 2O 5/Al 2O 3 Core-Shell Nanowires in Terms of Short-Range-Order Structures. ACS APPLIED MATERIALS & INTERFACES 2021; 13:24238-24249. [PMID: 33988356 DOI: 10.1021/acsami.1c02936] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Single-crystalline niobium pentoxide nanowires (NWs) of length 10-15 μm and diameter 100-200 nm are synthesized by thermal oxidation of niobium substrates in a mild vacuum (3-10 mbar). Amorphous Al2O3 shells of varying thicknesses (10, 30, 40, and 50 nm) are deposited on top of the wires using atomic layer deposition. Bending tests of the uncoated Nb2O5 NWs and the Nb2O5/Al2O3 core-shell NWs are carried out inside a scanning electron microscope using a micromanipulator with a force measurement tip. The experimental deflection curves are modeled with Euler-Bernoulli (E-B) beam theory, and the Young's modulus is manipulated to determine the best fit. The Nb2O5 NWs with no shell are determined to have a Young's modulus of 67 ± 10 GPa, which agrees with the published data on Nb2O5 thin films. For core-shell NWs, only small deflections of the wires with 10 and 30 nm thick shells can be fitted with the E-B model when utilizing constant Young's modulus values of 67 GPa for the Nb2O5 core and about 160 GPa for the Al2O3 shell. When allowing for a change in the Young's modulus of the Al2O3 shell, the Young's modulus is determined to be at 120 ± 10 GPa for 10 nm and 145 ± 12 GPa for 30 nm at the highest applied load. For thicknesses of 40 nm and 50 nm, we observed a reduced but constant 120 ± 11 and 111 ± 10 GPa, respectively. Such behavior may result from structural disordering of the amorphous Al2O3 through reducing fractions of the densely packed polyhedra, while the fractions of the loosely packed polyhedra increase as a result of the increasing strain or the fabrication process. The increased disorder is associated with increased average interatomic spacing. Thus, the atomic bonding force and also the Young's modulus decrease.
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Affiliation(s)
- Gábor Csiszár
- Department of Materials Physics, Institute for Materials Science, University of Stuttgart, Stuttgart 70569, Germany
| | - Robert Lawitzki
- Department of Materials Physics, Institute for Materials Science, University of Stuttgart, Stuttgart 70569, Germany
| | - Christopher Everett
- Department of Functional Materials, Faculty of Physics, Technical University Munich, Garching 85747, Germany
| | - Guido Schmitz
- Department of Materials Physics, Institute for Materials Science, University of Stuttgart, Stuttgart 70569, Germany
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23
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Aalling-Frederiksen O, Juelsholt M, Anker AS, Jensen KMØ. Formation and growth mechanism for niobium oxide nanoparticles: atomistic insight from in situ X-ray total scattering. NANOSCALE 2021; 13:8087-8097. [PMID: 33956920 PMCID: PMC8101635 DOI: 10.1039/d0nr08299f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2020] [Accepted: 03/14/2021] [Indexed: 06/08/2023]
Abstract
Understanding the mechanisms for nanoparticle nucleation and growth is crucial for the development of tailormade nanomaterials. Here, we use X-ray total scattering and Pair Distribution Function analysis to follow the formation and growth of niobium oxide nanoparticles. We study the solvothermal synthesis from niobium chloride in benzyl alcohol, and through investigations of the influence of reaction temperature, a formation pathway can be suggested. Upon dissolution of niobium chloride in benzyl alcohol, octahedral [NbCl6-xOx] complexes form through exchange of chloride ligands. Heating of the solution results in polymerization, where larger clusters built from multiple edge-sharing [NbCl6-xOx] octahedra assemble. This leads to the formation of a nucleation cluster with the ReO3 type structure, which grows to form nanoparticles of the Wadsley-Roth type H-Nb2O5 structure, which in the bulk phase usually only forms at high temperature. Upon further growth, structural defects appear, and the presence of shear-planes in the structure appears highly dependent on nanoparticle size.
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Affiliation(s)
| | - Mikkel Juelsholt
- Department of Chemistry and Nano-Science Center, University of Copenhagen2100 Copenhagen ØDenmark
| | - Andy S. Anker
- Department of Chemistry and Nano-Science Center, University of Copenhagen2100 Copenhagen ØDenmark
| | - Kirsten M. Ø. Jensen
- Department of Chemistry and Nano-Science Center, University of Copenhagen2100 Copenhagen ØDenmark
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24
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New Solids in As-O-Mo, As(P)-O-Mo(W) and As(P)-O-Nb(W) Systems That Exhibit Nonlinear Optical Properties. Molecules 2021; 26:molecules26051494. [PMID: 33803443 PMCID: PMC7967165 DOI: 10.3390/molecules26051494] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2021] [Revised: 02/19/2021] [Accepted: 03/01/2021] [Indexed: 11/16/2022] Open
Abstract
Interactions between well-mixed fine powders of As2O3, P2O5, MoO3, WO3 and Nb2O5 at different stoichiometry in quartz ampoules under vacuum at ~1000 °C in the presence of metallic molybdenum (or niobium), over several weeks, led to shiny dichroic crystalline materials being formed in cooler parts of the reaction vessel. An addition of small quantities of metals-Mo or Nb-was made with the aim of partially reducing their highly oxidized Mo(VI), W(VI) or Nb(V) species to corresponding Mo(V), W(V) and Nb(IV) centers, in order to form mixed valence solids. Sublimed crystals of four new compounds were investigated using a variety of techniques, with prime emphasis on the X-ray analysis, followed by spectroscopy (diffusion reflectance, IR, Raman and EPR), second harmonic generation (SHG), thermal analysis under N2 and air atmosphere, and single crystals electrical conductivity studies. The results evidenced the formation of new complex solids of previously unknown compositions and structures. Three out of four compounds crystallized in non-centrosymmetric space groups and represent layered 2D polymeric puckered structures that being stacked on each other form 3D lattices. All new solids exhibit strong second-harmonic-generation (SHG effect; based on YAG 1064 nm tests with detection of 532 nm photons), and a rare photosalient effect when crystals physically move in the laser beam. Single crystals' electrical conductivity of the four new synthesized compounds was measured, and the results showed their semiconductor behavior. Values of band gaps of these new solids were determined using diffusion reflectance spectroscopy in the visible region. Aspects of new solids' practical usefulness are discussed.
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25
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Versatile Coordination Polymer Catalyst for Acid Reactions Involving Biobased Heterocyclic Chemicals. Catalysts 2021. [DOI: 10.3390/catal11020190] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
The chemical valorization/repurposing of biomass-derived chemicals contributes to a biobased economy. Furfural (Fur) is a recognized platform chemical produced from renewable lignocellulosic biomass, and furfuryl alcohol (FA) is its most important application. The aromatic aldehydes Fur and benzaldehyde (Bza) are commonly found in the slate of compounds produced via biomass pyrolysis. On the other hand, glycerol (Gly) is a by-product of the industrial production of biodiesel, derived from fatty acid components of biomass. This work focuses on acid catalyzed routes of Fur, Bza, Gly and FA, using a versatile crystalline lamellar coordination polymer catalyst, namely [Gd(H4nmp)(H2O)2]Cl·2H2O (1) [H6nmp=nitrilotris(methylenephosphonic acid)] synthesized via an ecofriendly, relatively fast, mild microwave-assisted approach (in water, 70 °C/40 min). This is the first among crystalline coordination polymers or metal-organic framework type materials studied for the Fur/Gly and Bza/Gly reactions, giving heterobicyclic products of the type dioxolane and dioxane, and was also effective for the FA/ethanol reaction. 1 was stable and promoted the target catalytic reactions, selectively leading to heterobicyclic dioxane and dioxolane type products in the Fur/Gly and Bza/Gly reactions (up to 91% and 95% total yields respectively, at 90 °C/4 h), and, on the other hand, 2-(ethoxymethyl)furan and ethyl levulinate from heterocyclic FA.
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26
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Santos MC, Bizeto MA, Camilo FF. Polyaniline–niobium oxide nanohybrids with photocatalytic activity under visible light irradiation. NEW J CHEM 2021. [DOI: 10.1039/d0nj06215d] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
In this study, we reported the production of polyaniline and niobium oxide hybrids synthesized by the direct reaction between a niobium peroxyoxalate complex and anilinium salt in an aqueous medium.
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Affiliation(s)
- Marconi C. Santos
- Departamento de Química
- Instituto de Ciências Ambientais
- Químicas e Farmacêuticas
- Universidade Federal de São Paulo
- Diadema
| | - Marcos A. Bizeto
- Departamento de Química
- Instituto de Ciências Ambientais
- Químicas e Farmacêuticas
- Universidade Federal de São Paulo
- Diadema
| | - Fernanda F. Camilo
- Departamento de Química
- Instituto de Ciências Ambientais
- Químicas e Farmacêuticas
- Universidade Federal de São Paulo
- Diadema
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27
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Siddiki SMAH, Rashed MN, Touchy AS, Jamil MAR, Jing Y, Toyao T, Maeno Z, Shimizu KI. Hydrolysis of amides to carboxylic acids catalyzed by Nb 2O 5. Catal Sci Technol 2021. [DOI: 10.1039/d0cy02230f] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
An efficient heterogeneous Nb2O5 catalytic system has been developed for industrially important and challenging amide hydrolysis reaction to carboxylic acid through cleavage of resonance stabilized amidic C–N bond.
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Affiliation(s)
| | | | | | - Md. A. R. Jamil
- Institute for Catalysis
- Hokkaido University
- Sapporo 001-0021
- Japan
| | - Yuan Jing
- Institute for Catalysis
- Hokkaido University
- Sapporo 001-0021
- Japan
| | - Takashi Toyao
- Institute for Catalysis
- Hokkaido University
- Sapporo 001-0021
- Japan
- Elements Strategy Initiative for Catalysts and Batteries
| | - Zen Maeno
- Institute for Catalysis
- Hokkaido University
- Sapporo 001-0021
- Japan
| | - Ken-ichi Shimizu
- Institute for Catalysis
- Hokkaido University
- Sapporo 001-0021
- Japan
- Elements Strategy Initiative for Catalysts and Batteries
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28
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Branzi L, Back M, Cortelletti P, Pinna N, Benedetti A, Speghini A. Sodium niobate based hierarchical 3D perovskite nanoparticle clusters. Dalton Trans 2020; 49:15195-15203. [PMID: 33030177 DOI: 10.1039/d0dt02768e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
We report a microwave assisted synthesis of NaNbO3 perovskite mesocrystals with a hierarchical morphology formed by the self-assembly of nanoparticles in particle clusters. The synthesis method combines non-aqueous sol-gel synthesis and microwave heating in a single step process that allows us to isolate crystalline single phase NaNbO3 in few minutes. A detailed investigation of the effect of the reaction temperature on the crystallinity and morphology of the product was conducted. The synthesis stabilizes the unusual orthorhombic phase Pmma, a property that can be ascribed to the crystal size (24 nm). TEM and SAED analyses show that the hierarchical polycrystalline particles behave as single crystals, a feature related to a non-classical crystallization mechanism. Moreover, the optical bandgap of this NaNbO3 phase was estimated for the first time. The results suggest the potential of this synthetic procedure for the fast production of high quality tertiary oxide nanocrystals.
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Affiliation(s)
- Lorenzo Branzi
- Department of Molecular Sciences and Nanosystems, Ca' Foscari University of Venice, Via Torino 155, Venezia Mestre, Italy.
| | - Michele Back
- Department of Molecular Sciences and Nanosystems, Ca' Foscari University of Venice, Via Torino 155, Venezia Mestre, Italy.
| | - Paolo Cortelletti
- Nanomaterials Research Group, Department of Biotechnology and INSTM, RU Verona, University of Verona, Strada le Grazie 15, Verona, Italy.
| | - Nicola Pinna
- Institut für Chemie and IRIS Adlershof, Humboldt-Universität zu Berlin, Brook-Taylor-Str. 2, 12489 Berlin, Germany.
| | - Alvise Benedetti
- Department of Molecular Sciences and Nanosystems, Ca' Foscari University of Venice, Via Torino 155, Venezia Mestre, Italy.
| | - Adolfo Speghini
- Nanomaterials Research Group, Department of Biotechnology and INSTM, RU Verona, University of Verona, Strada le Grazie 15, Verona, Italy.
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29
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Xu W, Russo PA, Schultz T, Koch N, Pinna N. Niobium‐Doped Titanium Dioxide with High Dopant Contents for Enhanced Lithium‐Ion Storage. ChemElectroChem 2020. [DOI: 10.1002/celc.202001040] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Wenlei Xu
- Institut für Chemie and IRIS Adlershof Humboldt-Universität zu Berlin Brook-Taylor-Str. 2 12489 Berlin Germany
| | - Patrícia A. Russo
- Institut für Chemie and IRIS Adlershof Humboldt-Universität zu Berlin Brook-Taylor-Str. 2 12489 Berlin Germany
| | - Thorsten Schultz
- Institut für Physik and IRIS Adlershof Humboldt-Universität zu Berlin Brook-Taylor-Str. 2 12489 Berlin Germany
- Helmholtz-Zentrum Berlin für Materialien und Energie GmbH Albert-Einstein Str. 15 12489 Berlin Germany
| | - Norbert Koch
- Institut für Physik and IRIS Adlershof Humboldt-Universität zu Berlin Brook-Taylor-Str. 2 12489 Berlin Germany
- Helmholtz-Zentrum Berlin für Materialien und Energie GmbH Albert-Einstein Str. 15 12489 Berlin Germany
| | - Nicola Pinna
- Institut für Chemie and IRIS Adlershof Humboldt-Universität zu Berlin Brook-Taylor-Str. 2 12489 Berlin Germany
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30
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Morawa Eblagon K, Malaika A, Ptaszynska K, Pereira MFR, Figueiredo JL. Impact of Thermal Treatment of Nb 2O 5 on Its Performance in Glucose Dehydration to 5-Hydroxymethylfurfural in Water. NANOMATERIALS 2020; 10:nano10091685. [PMID: 32867154 PMCID: PMC7559716 DOI: 10.3390/nano10091685] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/10/2020] [Revised: 08/14/2020] [Accepted: 08/21/2020] [Indexed: 11/16/2022]
Abstract
The cascade dehydration of glucose to 5-hydroxymethylfurfural (HMF) was carried out in water over a series of Nb2O5 catalysts, which were derived from the thermal treatment of niobic acid at 300 and 550 °C, under air or inert atmosphere. Amorphous niobic acid showed high surface area (366 m2/g) and large acidity (2.35 mmol/g). With increasing the temperature of the thermal treatment up to 550 °C, the amorphous Nb2O5 was gradually transformed into a pseudohexagonal phase, resulting in a decrease in surface area (27-39 m2/g) and total acidity (0.05-0.19 mmol/g). The catalysts' performance in cascade dehydration of glucose realized in pure water was strongly influenced by the total acidity of these materials. A remarkable yield of 37% HMF in one-pot reaction in water was achieved using mesoporous amorphous niobium oxide prepared by thermal treatment of niobic acid at 300 °C in air. The best-performing catalyst displayed a total acidity lower than niobic acid (1.69 mmol/g) which afforded a correct balance between a high glucose conversion and limited further conversion of the target product to numerous polymers and humins. On the other hand, the treatment of niobic acid at 550 °C, independently of the atmosphere used during the sample preparation (i.e., air or N2), resulted in Nb2O5 catalysts with a high ratio of Lewis to Brønsted acid sites and poor total acidity. These materials excelled at catalyzing the isomerization step in the tandem process.
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Affiliation(s)
- Katarzyna Morawa Eblagon
- Associate Laboratory LSRE-LCM, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias s/n, 4200-465 Porto, Portugal; (K.P.); (M.F.R.P.); (J.L.F.)
- Correspondence: (K.M.E.); (A.M.)
| | - Anna Malaika
- Faculty of Chemistry, Adam Mickiewicz University in Poznań, Uniwersytetu Poznańskiego 8, 61-614 Poznań, Poland
- Correspondence: (K.M.E.); (A.M.)
| | - Karolina Ptaszynska
- Associate Laboratory LSRE-LCM, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias s/n, 4200-465 Porto, Portugal; (K.P.); (M.F.R.P.); (J.L.F.)
- Faculty of Chemistry, Adam Mickiewicz University in Poznań, Uniwersytetu Poznańskiego 8, 61-614 Poznań, Poland
| | - Manuel Fernando R. Pereira
- Associate Laboratory LSRE-LCM, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias s/n, 4200-465 Porto, Portugal; (K.P.); (M.F.R.P.); (J.L.F.)
| | - José Luís Figueiredo
- Associate Laboratory LSRE-LCM, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias s/n, 4200-465 Porto, Portugal; (K.P.); (M.F.R.P.); (J.L.F.)
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31
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Ban K, Yamamoto Y, Sajiki H, Sawama Y. Arylation of indoles using cyclohexanones dually-catalyzed by niobic acid and palladium-on-carbons. Org Biomol Chem 2020; 18:3898-3902. [PMID: 32400844 DOI: 10.1039/d0ob00702a] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
3-Arylindoles were easily constructed from indoles and cyclohexanone derivatives using a combination of catalytic niobic acid-on-carbon (Nb2O5/C) and palladium-on-carbon (Pd/C) under heating conditions without any oxidants. The Lewis acidic Nb2O5/C promoted the nucleophilic addition of indoles to the cyclohexanones, and the subsequent dehydration and Pd/C-catalyzed dehydrogenation produced the 3-arylindoles. The additive 2,3-dimethyl-1,3-butadiene worked as a hydrogen acceptor to facilitate the dehydrogenation step.
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Affiliation(s)
- Kazuho Ban
- Laboratory of Organic Chemistry, Gifu Pharmaceutical University, 1-25-4 Daigakunishi, Gifu 501-1196, Japan.
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32
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Qaraah FA, Mahyoub SA, Hezam A, Zhang W, Xiu G, Munyaneza J, Wu C. Facile synthesis of flower-like hierarchical N-doped Nb2O5/C nanostructures with efficient photocatalytic activity under visible light. RSC Adv 2020; 10:32309-32322. [PMID: 35516491 PMCID: PMC9056605 DOI: 10.1039/d0ra02868a] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2020] [Accepted: 07/20/2020] [Indexed: 11/23/2022] Open
Abstract
Significant endeavors have been devoted in the past few years to establish efficient visible light-activated photocatalysts. Herein, we successfully synthesized a flower-like hierarchical nitrogen-doped and carbon-sensitized Nb2O5 (NBO) nanostructure (denoted N-NBO/C). The as-prepared N-NBO/C possessed a specific surface area of 260.37 m2 g−1 and single wire diameter of less than 10 nm. The effect of reaction parameters such as hydrothermal reaction time, temperature and concentration of hexamethylenetetramine (Hmta) on the morphology of NBO was systematically investigated to elucidate the growth mechanism. The carbon on the surface and the nitrogen in the framework of NBO are beneficial for light harvesting, visible light absorption, formation of oxygen vacancies, and electron–hole separation. The photocatalytic performance of the as-fabricated N-NBO/C nanostructures was estimated via the photodegradation of 30 mg L−1 RhB, where greater than 98% of RhB was decomposed within 30 min upon visible-light radiation. Hence, the obtained N-NBO/C nanostructure exhibits much higher photocatalytic activity for the decomposition of RhB upon visible light irradiation than that of pure niobium oxide (NBO), nitrogen-doped titanium oxide (N-TIO), and nitrogen-doped niobium oxide (N-NBO). This work supplies a versatile route for the synthesis of nitrogen-doped and carbon-sensitized metal-oxide nanostructures for possible utilization in solar energy transformation and environmental remediation. Flower-like hierarchical N-doped Nb2O5/C nanostructures with efficient visible light-driven photocatalytic activity synthesized via a facile hexamethylenetetramine-assisted hydrothermal route.![]()
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Affiliation(s)
- Fahim A. Qaraah
- State Environmental Protection Key Lab of Environmental Risk Assessment and Control on Chemical Processes
- School of Resources & Environmental Engineering
- East China University of Science and Technology
- Shanghai 200237
- China
| | - Samah A. Mahyoub
- State Key Laboratory of Chemical Engineering
- School of Chemical Engineering
- East China University of Science and Technology
- Shanghai 200237
- China
| | - Abdo Hezam
- Centre for Materials Science and Technology
- University of Mysore
- Mysore
- India
| | - Wei Zhang
- State Environmental Protection Key Lab of Environmental Risk Assessment and Control on Chemical Processes
- School of Resources & Environmental Engineering
- East China University of Science and Technology
- Shanghai 200237
- China
| | - Guangli Xiu
- State Environmental Protection Key Lab of Environmental Risk Assessment and Control on Chemical Processes
- School of Resources & Environmental Engineering
- East China University of Science and Technology
- Shanghai 200237
- China
| | - Janvier Munyaneza
- State Environmental Protection Key Lab of Environmental Risk Assessment and Control on Chemical Processes
- School of Resources & Environmental Engineering
- East China University of Science and Technology
- Shanghai 200237
- China
| | - Chengzi Wu
- State Environmental Protection Key Lab of Environmental Risk Assessment and Control on Chemical Processes
- School of Resources & Environmental Engineering
- East China University of Science and Technology
- Shanghai 200237
- China
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