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Giziński D, Mojsilović K, Brudzisz A, Tiringer U, Vasilić R, Taheri P, Stępniowski WJ. Controlling the Morphology of Barrel-Shaped Nanostructures Grown via CuZn Electro-Oxidation. MATERIALS 2022; 15:ma15113961. [PMID: 35683258 PMCID: PMC9181876 DOI: 10.3390/ma15113961] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/04/2022] [Revised: 05/27/2022] [Accepted: 05/31/2022] [Indexed: 11/16/2022]
Abstract
Herein, we report a feasible method for forming barrel-like hybrid Cu(OH)2-ZnO structures on α-brass substrate via low-potential electro-oxidation in 1 M NaOH solution. The presented study was conducted to investigate the electrochemical behavior of CuZn in a passive range (−0.2 V–0.5 V) and its morphological changes that occur under these conditions. As found, morphology and phase composition of the grown layer strongly depend on the applied potential, and those material characteristics can be tuned by varying the operating conditions. To the best of our knowledge, the yielded morphology of barrel-like structure has not been previously observed for brass anodizing. Additionally, photoactivity under both UV and daylight irradiation-induced degradation of organic dye (methyl orange) using Cu(OH)2-ZnO composite was explored. Obtained results proved photocatalytic activity of the material that led to degradation of 43% and 36% of the compound in UV and visible light, respectively. The role of Cu(OH)2 in improving ZnO photoactivity was recognized and discussed. As implied by both the undertaken research and the literature on the subject, cupric hydroxide can act as a trap for photoexcited electrons, and thus contributes to stabilizing electron-hole recombination. This resulted in improved light-absorbing properties of the photoactive component, ZnO.
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Affiliation(s)
- Damian Giziński
- Faculty of Advanced Technologies and Chemistry, Institute of Materials Science and Engineering, Military University of Technology, Kaliskiego Str. 2, 00908 Warsaw, Poland;
- Correspondence: (D.G.); (W.J.S.)
| | - Kristina Mojsilović
- Faculty of Physics, University of Belgrade, Studentski Trg 12–16, 11000 Belgrade, Serbia; (K.M.); (R.V.)
| | - Anna Brudzisz
- Faculty of Advanced Technologies and Chemistry, Institute of Materials Science and Engineering, Military University of Technology, Kaliskiego Str. 2, 00908 Warsaw, Poland;
| | - Urša Tiringer
- Department Material Science and Engineering, Faculty of Mechanical, Maritime and Materials Engineering, Delft University of Technology, 2 Mekelweg, 2628 CD Delft, The Netherlands; (U.T.); (P.T.)
| | - Rastko Vasilić
- Faculty of Physics, University of Belgrade, Studentski Trg 12–16, 11000 Belgrade, Serbia; (K.M.); (R.V.)
| | - Peyman Taheri
- Department Material Science and Engineering, Faculty of Mechanical, Maritime and Materials Engineering, Delft University of Technology, 2 Mekelweg, 2628 CD Delft, The Netherlands; (U.T.); (P.T.)
| | - Wojciech J. Stępniowski
- Faculty of Advanced Technologies and Chemistry, Institute of Materials Science and Engineering, Military University of Technology, Kaliskiego Str. 2, 00908 Warsaw, Poland;
- Correspondence: (D.G.); (W.J.S.)
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Alsamhary K, Al-Enazi NM, Alhomaidi E, Alwakeel S. Spirulina platensis mediated biosynthesis of Cuo Nps and photocatalytic degradation of toxic azo dye Congo red and kinetic studies. ENVIRONMENTAL RESEARCH 2022; 207:112172. [PMID: 34606844 DOI: 10.1016/j.envres.2021.112172] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2021] [Revised: 09/27/2021] [Accepted: 09/30/2021] [Indexed: 06/13/2023]
Abstract
The current research is designed to synthesis Copper oxide nanoparticles (CuO NPs) using Cyanobacterium in greener way. The NPs were synthesized using Spirulina platensis. The method is adopted for the less toxic, less cost and environment friendly method. The synthesized CuO NPs are capped and stabilized by the natural substance of S. platensis including flavonoids, phenolic and acid groups of the microorganism which was confirmed by the GC-MS analysis. Majorly, beta-ionone, p-cumic aldehyde, phytol compounds are identified by GC-MS and it may also involve in the preparation of NPs. Further, the characterization has been carried out using UV-Vis spectroscopy, Fourier-transform infrared spectroscopy (FT-IR), X-ray diffraction, Scanning electron microscope (SEM), transmission electron microscope (TEM). All the analytical techniques are confirmed the formation of NPs. The formed NPs are showed significant peaks in XRD analysis which further compared with literature. Functional group analysis showed -OH group compounds in extract and it might involve in the formation of NPs. The photo catalytic activity of CuO NPs was showed significant photo degradation of Congo red (CR) dye. The consideration of intense peak, the size of CuO NPs was calculated and found to be 15.2 nm with spherical shape as resulted in morphological identification. The results are showed good photocatalytic activity, since the peak appeared at 230 and 495 nm corresponding to the benzene and azo group of Congo Red were gradually decreased with increase of time. The reaction was found to have nature of pseudo first order reaction. The rate constant was calculated and was found to be - k = 0.3459, which indicates the Congo red degradation was 0.3459 per minute. This study will be a base for budding researchers for their isolation of S. platensis active compounds and with the help of secondary metabolites (active compounds) CuO NPs were synthesized which further acted has degradation agent against Congo red.
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Affiliation(s)
- Khawla Alsamhary
- Department of Biology, College of Science and Humanities in Al-Kharj, Prince Sattam Bin Abdulaziz University, Al-kharj, 11942, Saudi Arabia.
| | - Nouf M Al-Enazi
- Department of Biology, College of Science and Humanities in Al-Kharj, Prince Sattam Bin Abdulaziz University, Al-kharj, 11942, Saudi Arabia
| | - Eman Alhomaidi
- Department of Biology, College of Science, Princess Nourah bint Abdulrahman University, Riyadh, 11671, Saudi Arabia
| | - Saad Alwakeel
- Department of Biology, College of Science, Princess Nourah bint Abdulrahman University, Riyadh, 11671, Saudi Arabia.
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Balusamy B, Senthamizhan A, Celebioglu A, Uyar T. Single nozzle electrospinning promoted hierarchical shell wall structured zinc oxide hollow tubes for water remediation. J Colloid Interface Sci 2021; 593:162-171. [PMID: 33744527 DOI: 10.1016/j.jcis.2021.02.089] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2020] [Revised: 02/15/2021] [Accepted: 02/21/2021] [Indexed: 11/25/2022]
Abstract
HYPOTHESIS Electrospun metal oxide hollow tubes are of great interest owing to their unique structural advantages compared to solid nanofibers. Although intensive research on preparation of hollow tubes have been devoted, formation of hierarchical shells remains a significant challenge. EXPERIMENTS Herein, we demonstrate the fabrication of highly uniform, reproducible and industrially feasible ZnO hollow tubes (ZHT) with two-level hierarchical shells via a simple and versatile single-nozzle electrospinning strategy coupled with subsequent controlled thermal treatment. FINDINGS The morphological investigation reveals that the hollow tubes built from nanostructures which has unique surface structure on their wall. The mechanism by which the composite fibers transferred to hollow tubes is primarily based on the evaporation rate of the polymeric template. Notably, tuning the heating rate from 5 °C to 50 °C/min possess adverse effect on formation of hollow tubes, thus subsequently produced ZnO nanoplates (ZNP). The comparative photocatalytic analysis emphasized that ZHT shows higher photocatalytic activity than ZNP. This finding has made an evident that the inherent abundant defects in the electrospun derived nanostructures are not only sufficient for improving the photocatalytic activity. Studies on bacterial growth inhibition showcased a superior bactericidal effect against Staphylococcus aureus and Escherichia coli implying its potentiality for disinfecting the bacteria from water.
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Affiliation(s)
- Brabu Balusamy
- Institute of Materials Science & Nanotechnology, UNAM-National Nanotechnology Research Center, Bilkent University, Ankara 06800, Turkey.
| | - Anitha Senthamizhan
- Institute of Materials Science & Nanotechnology, UNAM-National Nanotechnology Research Center, Bilkent University, Ankara 06800, Turkey.
| | - Asli Celebioglu
- Institute of Materials Science & Nanotechnology, UNAM-National Nanotechnology Research Center, Bilkent University, Ankara 06800, Turkey
| | - Tamer Uyar
- Institute of Materials Science & Nanotechnology, UNAM-National Nanotechnology Research Center, Bilkent University, Ankara 06800, Turkey; Department of Fiber Science & Apparel Design, College of Human Ecology, Cornell University, Ithaca, NY 14853, USA.
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Thongam DD, Chaturvedi H. Advances in nanomaterials for heterogeneous photocatalysis. NANO EXPRESS 2021. [DOI: 10.1088/2632-959x/abeb8d] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Abstract
Photocatalysis method for environmental applications has been using for a long time. This review article traces back the origin of catalysis, its classification and journey of development to heterogeneous photocatalysis and the article’s novelty is in the simplicity, and easily understandable language, designed for the beginners. These heterogeneous photocatalysts are grouped into eleven different categories. As the paper is focused on photocatalysis, an insight on fundamental principles and mechanisms of photocatalysis are explained systematically with schematic illustrations and reactions that take place during redox- oxidation and reduction reactions in photocatalysis. With an approach towards utilizing green energy and expanding the photocatalyst’ absorption wavelength range towards the visible regime, bandgap engineering techniques by adopting doping and hetero-structures are explained with examples of different materials. In addition, dominating factors of photocatalysis reaction viz. composition of a heterogeneous photocatalyst, doping, hetero-structures, pH, surface defects on photocatalysis reaction are explored, focussing on variable charge transfer mechanisms. The main influencing factor in generating reactive oxygen species is pH of the photocatalysis reaction and are studied indetail. The effect of alkalinity or acidity in catalyst surfaces and molecular interaction depending upon the point zero charges of the photocatalyst are discussed. For the better study of catalyst properties, careful analysis and study is a much-needed field as a scope for further improvement. Hence, this article will guide a beginner to understand the photocatalysis topic with ease.
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Ahmed S, Sameen DE, Lu R, Li R, Dai J, Qin W, Liu Y. Research progress on antimicrobial materials for food packaging. Crit Rev Food Sci Nutr 2020; 62:3088-3102. [DOI: 10.1080/10408398.2020.1863327] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Saeed Ahmed
- College of Food Science, Sichuan Agricultural University, Ya’an, China
| | - Dur E. Sameen
- College of Food Science, Sichuan Agricultural University, Ya’an, China
| | - Rui Lu
- College of Food Science, Sichuan Agricultural University, Ya’an, China
| | - Rui Li
- College of Food Science, Sichuan Agricultural University, Ya’an, China
| | - Jianwu Dai
- College of Mechanical and Electrical Engineering, Sichuan Agricultural University, Ya’an, China
| | - Wen Qin
- College of Food Science, Sichuan Agricultural University, Ya’an, China
| | - Yaowen Liu
- College of Food Science, Sichuan Agricultural University, Ya’an, China
- California NanoSystems Institute, University of California, Los Angeles, CA, USA
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Abbas HS, Krishnan A, Kotakonda M. Antifungal and antiovarian cancer properties of α Fe 2O 3 and α Fe 2O 3/ZnO nanostructures synthesised by Spirulina platensis. IET Nanobiotechnol 2020; 14:774-784. [PMID: 33399108 PMCID: PMC8676415 DOI: 10.1049/iet-nbt.2020.0055] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2020] [Revised: 05/16/2020] [Accepted: 05/28/2020] [Indexed: 01/04/2023] Open
Abstract
Candida albicans (C. albicans) infection shows a growing burden on human health, and it has become challenging to search for treatment. Therefore, this work focused on the antifungal activity, and cytotoxic effect of biosynthesised nanostructures on human ovarian tetracarcinoma cells PA1 and their corresponding mechanism of cell death. Herein, the authors fabricated advanced biosynthesis of uncoated α-Fe2O3 and coated α-Fe2O3 nanostructures by using the carbohydrate of Spirulina platensis. The physicochemical features of nanostructures were characterised by UV-visible, high resolution transmission electron microscopy, Fourier transform infrared spectroscopy, and X-ray diffraction. The antifungal activity of these nanostructures against C. albicans was studied by the broth dilution method, and examined by 2', 7'-dichlorofluorescein diacetate staining. However, their cytotoxic effects against PA1 cell lines were evaluated by MTT and comet assays. Results indicated characteristic rod-shaped nanostructures, and increasing the average size of α-Fe2O3@ZnO nanocomposite (105.2 nm × 29.1 nm) to five times as compared to α-Fe2O3 nanoparticles (20.73nm × 5.25 nm). The surface coating of α-Fe2O3 by ZnO has increased its antifungal efficiency against C. albicans. Moreover, the MTT results revealed that α-Fe2O3@ZnO nanocomposite reduces PA1 cell proliferation due to DNA fragmentation (IC50 18.5 μg/ml). Continual advances of green nanotechnology and promising findings of this study are in favour of using the construction of rod-shaped nanostructures for therapeutic applications.
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Affiliation(s)
- Heba Salah Abbas
- Department of Pharmaceutical Technology, Bharathidasan Institute of Technology, Anna University, Tiruchirappalli-620024, Tamilnadu, India.
| | - Akilandeswari Krishnan
- Department of Pharmaceutical Technology, Bharathidasan Institute of Technology, Anna University, Tiruchirappalli-620024, Tamilnadu, India
| | - Muddukrishnaiah Kotakonda
- Department of Pharmaceutical Technology, Bharathidasan Institute of Technology, Anna University, Tiruchirappalli-620024, Tamilnadu, India
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Upadhyay GK, Pathak TK, Purohit LP. Heterogeneous Ternary Metal Oxide Nanocomposites for Improved Advanced Oxidation Process under Visible Light. CRYSTAL RESEARCH AND TECHNOLOGY 2020. [DOI: 10.1002/crat.202000099] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Gaurav K. Upadhyay
- Semiconductor Research Lab; Department of Physics; Gurukula Kangri University; Haridwar 249404 India
| | - Trilok K. Pathak
- Semiconductor Research Lab; Department of Physics; Gurukula Kangri University; Haridwar 249404 India
- Department of Physics, TKCOE; Teerthanker Mahaveer University; Moradabad 244001 India
| | - Lakshami P. Purohit
- Semiconductor Research Lab; Department of Physics; Gurukula Kangri University; Haridwar 249404 India
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Ocimum tenuiflorum leaf extract as a green mediator for the synthesis of ZnO nanocapsules inactivating bacterial pathogens. CHEMICAL PAPERS 2020. [DOI: 10.1007/s11696-020-01177-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Chang JS, Strunk J, Chong MN, Poh PE, Ocon JD. Multi-dimensional zinc oxide (ZnO) nanoarchitectures as efficient photocatalysts: What is the fundamental factor that determines photoactivity in ZnO? JOURNAL OF HAZARDOUS MATERIALS 2020; 381:120958. [PMID: 31416043 DOI: 10.1016/j.jhazmat.2019.120958] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2019] [Revised: 08/01/2019] [Accepted: 08/01/2019] [Indexed: 06/10/2023]
Abstract
While bulk zinc oxide (ZnO) is of non-toxic in nature, ZnO nanoarchitectures could potentially induce the macroscopic characteristics of oxidative, lethality and toxicity in the water environment. Here we report a systematic study through state-of-the-art controllable synthesis of multi-dimensional ZnO nanoarchitectures (i.e. 0D-nanoparticle, 1D-nanorod, 2D-nanosheet, and 3D-nanoflowers), and subsequent in-depth understanding on the fundamental factor that determines their photoactivities. The photoactivities of resultant ZnO nanoarchitectures were interpreted in terms of the photodegradation of salicylic acid as well as inactivation of Bacillus subtilis and Escherichia coli under UV-A irradiation. Photodegradation results showed that 1D-ZnO nanorods demonstrated the highest salicylic acid photodegradation efficiency (99.4%) with a rate constant of 0.0364 min-1. 1D-ZnO nanorods also exhibited the highest log reductions of B. subtilis and E. coli of 3.5 and 4.2, respectively. Through physicochemical properties standardisation, an intermittent higher k value for pore diameter (0.00097 min-1 per mm), the highest k values for crystallite size (0.00171 min-1 per nm) and specific surface area (0.00339 min-1 per m2/g) contributed to the exceptional photodegradation performance of nanorods. Whereas, the average normalised log reduction against the physicochemical properties of nanorods (i.e. low crystallite size, high specific surface area and pore diameter) caused the strongest bactericidal effect.
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Affiliation(s)
- Jang Sen Chang
- School of Engineering, Chemical Engineering Discipline, Monash University Malaysia, Jalan Lagoon Selatan, Bandar Sunway, Selangor DE 47500, Malaysia
| | - Jennifer Strunk
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock (LIKAT), Albert-Einstein-Str. 29a, Rostock 18059, Germany
| | - Meng Nan Chong
- School of Engineering, Chemical Engineering Discipline, Monash University Malaysia, Jalan Lagoon Selatan, Bandar Sunway, Selangor DE 47500, Malaysia.
| | - Phaik Eong Poh
- School of Engineering, Chemical Engineering Discipline, Monash University Malaysia, Jalan Lagoon Selatan, Bandar Sunway, Selangor DE 47500, Malaysia
| | - Joey D Ocon
- Laboratory of Electrochemical Engineering (LEE), Department of Chemical Engineering, University of the Philippines Diliman, Quezon City 1101, Philippines
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10
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Rapid ultrasonic-microwave assisted synthesis of spindle-like Ag/ZnO nanostructures and their enhanced visible-light photocatalytic and antibacterial activities. Catal Today 2020. [DOI: 10.1016/j.cattod.2019.01.017] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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11
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Li J, Zhu Q, Su Y, Wang D, Xing Z, Fang L. High-efficiency bacteriostatic material modified by nano zinc oxide and polyelectrolyte diallyl dimethylammonium chloride based on red mud. Colloids Surf B Biointerfaces 2019; 177:260-266. [DOI: 10.1016/j.colsurfb.2019.02.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2018] [Revised: 01/09/2019] [Accepted: 02/03/2019] [Indexed: 11/26/2022]
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12
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The antibacterial and anticancer properties of zinc oxide coated iron oxide nanotextured composites. Colloids Surf B Biointerfaces 2019; 177:512-519. [PMID: 30818244 DOI: 10.1016/j.colsurfb.2019.02.041] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2018] [Revised: 01/30/2019] [Accepted: 02/20/2019] [Indexed: 12/25/2022]
Abstract
Core-shell α-Fe2O3-ZnO structures of different nanotextured morphology were synthesized through wet chemical routes using different solvents like ethanol, ethanolamine, water and acetaldehyde. Morphological tuning using different solvents resulted in the formation of different shapes, such as disc, spindle, rod and sphere (abbreviated as FZ-ND, FZ-NSP, FZ-NR and FZ-NS, respectively). Structural, morphological and compositional characterization of these nanoparticles (NPs) has been carried out. Antibacterial efficacy of the synthesized NPs was checked against Gram negative V. cholerae N16961 (VcN16961) and Gram positive S. aureus bacteria by recording optical density (OD) at different time points. Among the NPs tested, FZ-NSP was found to be the most effective against VcN16961, while FZ-NR showed maximum efficacy against S. aureus, implying the importance of nanotextured surface as well as the morphology in the manifestation of antibacterial activity. The kinetics of growth for both the bacteria has been modelled using logistic approach. Cytotoxicity was evaluated through MTT (3-(4,5-dimethyl-2-thiazolyl)-2,5-diphenyltetrazolium bromide) assay against human breast adenocarcinoma cell line (MCF-7), human hepatocarcinoma cell line (HepG2) and against normal human embryonic kidney cell line (HEK-293). The lesser toxicity of α-Fe2O3-ZnO towards HEK-293 and the potent anticancer activity against MCF-7 and HepG2 cells underline its applicability as anticancer agent. With continued improvement of nanotechnology, this study may pave the way for designing and construction of various morphologically diverse, nanotextured materials with desired functional attributes.
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Visinescu D, Hussien MD, Moreno JC, Negrea R, Birjega R, Somacescu S, Ene CD, Chifiriuc MC, Popa M, Stan MS, Carp O. Zinc Oxide Spherical-Shaped Nanostructures: Investigation of Surface Reactivity and Interactions with Microbial and Mammalian Cells. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:13638-13651. [PMID: 30340439 DOI: 10.1021/acs.langmuir.8b02528] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Two ZnO materials of spherical hierarchical morphologies, with hollow (ZnOHS) and solid cores (ZnOSS), were obtained through the hydrolysis of zinc acetylacetonate in 1,4-butanediol. The nature of the defects and surface reactivity for the two ZnO materials were investigated through photoluminescence, X-ray photoelectron spectroscopy, and electron paramagnetic resonance (EPR) spectroscopy proving the coexistence of shallow and deep defects and, also, the presence of polyol byproducts adsorbed on the outer layers of the ZnO samples. The EPR spectroscopy coupled with the spin-trapping technique showed that the surface of the ZnO samples generates reactive oxygen species (ROS) like hydroxyl (•OH) and singlet oxygen (1O2) as well as carbon-centered radicals. The ZnO materials exhibited a wide spectrum of antimicrobial activity, being active against Gram-positive, Gram-negative, and fungi strains, both in planktonic and, more importantly, adherent growth states. The decrease of antimicrobial efficiency in the presence of a ROS scavenger (mannitol) and the decrease of the cell viability with the ROS level suggest that one of the mechanisms that governs both the antimicrobial and cytotoxic activities on human liver cells is ROS-mediated. However, at active antimicrobial concentrations, the biocompatibility of the tested materials is very good.
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Affiliation(s)
- Diana Visinescu
- "Ilie Murgulescu" Institute of Physical Chemistry , Romanian Academy , 202 Splaiul Independentei , 060021 Bucharest , Romania
| | | | - Jose Calderon Moreno
- "Ilie Murgulescu" Institute of Physical Chemistry , Romanian Academy , 202 Splaiul Independentei , 060021 Bucharest , Romania
| | - Raluca Negrea
- National Institute of Materials Physics , Atomistilor 105bis , 77125 Magurele , Ilfov , Romania
| | - Ruxandra Birjega
- National Institute for Lasers, Plasma and Radiation Physics , 409 Atomistilor , P.O. Box MG-36, 077125 Bucharest , Romania
| | - Simona Somacescu
- "Ilie Murgulescu" Institute of Physical Chemistry , Romanian Academy , 202 Splaiul Independentei , 060021 Bucharest , Romania
| | - Cristian D Ene
- "Ilie Murgulescu" Institute of Physical Chemistry , Romanian Academy , 202 Splaiul Independentei , 060021 Bucharest , Romania
| | | | | | | | - Oana Carp
- "Ilie Murgulescu" Institute of Physical Chemistry , Romanian Academy , 202 Splaiul Independentei , 060021 Bucharest , Romania
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Achouri F, Merlin C, Corbel S, Alem H, Mathieu L, Balan L, Medjahdi G, Ben Said M, Ghrabi A, Schneider R. ZnO Nanorods with High Photocatalytic and Antibacterial Activity under Solar Light Irradiation. MATERIALS 2018; 11:ma11112158. [PMID: 30388867 PMCID: PMC6266891 DOI: 10.3390/ma11112158] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/04/2018] [Revised: 10/26/2018] [Accepted: 10/29/2018] [Indexed: 12/14/2022]
Abstract
ZnO nanorods (NRs) with an average length and diameter of 186 and 20 nm, respectively, were prepared through a mild solvothermal route and used as photocatalysts either as dispersed powder or immobilized on glass slides. The ZnO NRs were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), and X-ray diffraction (XRD). Dispersed ZnO NRs and, to a lesser extent, immobilized ZnO NRs were demonstrated to exhibit high photocatalytic activity under simulated sunlight of low intensity (5.5 mW/cm2) both for the degradation of the Orange II dye and for Escherichia coli bacterial decontamination (2.5-fold survival decrease after 180 min irradiation for immobilized NRs). SEM, atomic force microscopy (AFM), fluorescence spectroscopy, and epifluorescence microscopy demonstrate that cell surface damages are responsible of bacterial inactivation. The immobilized ZnO NRs could be reused up to five times for bacterial decontamination at comparable efficiency and therefore have great potential for real environmental applications.
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Affiliation(s)
- Faouzi Achouri
- Université de Lorraine, CNRS, LRGP, F-54000 Nancy, France.
- Centre de Recherches et Technologies des Eaux (CERTE), Laboratoire Eaux Usées et Environnement, P.O. Box 273, Soliman, Tunis 8020, Tunisia.
- Faculté des Sciences de Bizerte, Université de Carthage, Jarzouna, Bizerte 7021, Tunisia.
| | | | - Serge Corbel
- Université de Lorraine, CNRS, LRGP, F-54000 Nancy, France.
| | - Halima Alem
- Université de Lorraine, CNRS, IJL, F-54000 Nancy, France.
| | - Laurence Mathieu
- Université de Lorraine, CNRS, LCPME, F-5v4000 Nancy, France.
- EPHE, PSL Research University, LCPME, UMR 7564 Nancy, France.
| | - Lavinia Balan
- IS2M, CNRS UMR 7361, 15 Rue Jean Starcky, 68093 Mulhouse, France.
| | | | - Myriam Ben Said
- Centre de Recherches et Technologies des Eaux (CERTE), Laboratoire Eaux Usées et Environnement, P.O. Box 273, Soliman, Tunis 8020, Tunisia.
| | - Ahmed Ghrabi
- Centre de Recherches et Technologies des Eaux (CERTE), Laboratoire Eaux Usées et Environnement, P.O. Box 273, Soliman, Tunis 8020, Tunisia.
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Tan L, Ke X, Song X, Yin Q, Qiao R, Guo K, Zhu L. Double-layered core–shell structure of NaYF 4 :Yb,Er@SiO 2 @Zn 1−x Mn x O for near-infrared-triggered photodegradation and antibacterial application. J IND ENG CHEM 2018. [DOI: 10.1016/j.jiec.2017.11.008] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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16
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Gupta J, Bahadur D. Defect-Mediated Reactive Oxygen Species Generation in Mg-Substituted ZnO Nanoparticles: Efficient Nanomaterials for Bacterial Inhibition and Cancer Therapy. ACS OMEGA 2018; 3:2956-2965. [PMID: 30023854 PMCID: PMC6044716 DOI: 10.1021/acsomega.7b01953] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2017] [Accepted: 02/28/2018] [Indexed: 05/24/2023]
Abstract
Mg-substituted ZnO nanoparticles (MgZnO NPs) were synthesized by a soft chemical approach and were well-characterized by X-ray diffraction, transmission electron microscopy, UV-visible spectroscopy, and photoluminescence spectroscopy. The absorption and photoluminescence spectra show that substitution of Mg ions results in the widening of the band gap and a significant enhancement in the concentration of defects in ZnO NPs. A systemic study of generation of reactive oxygen species (ROS) under dark, daylight, and visible light conditions suggests that the aqueous suspension of MgZnO NPs generates a higher level of ROS because of the surface defects (oxygen vacancies). This capability of MgZnO NPs makes them a more promising candidate for the inhibition of bacterial growth and for killing of cancer cells as compared to pure ZnO NPs, possibly because of the enhanced interaction and accumulation of MgZnO NPs in the cytoplasm or cell membrane in the presence of both Zn2+ and Mg2+ ions. Further, MgZnO NPs exhibit excellent selective killing of nasopharyngeal carcinoma cells (KB) and cervical cancer cells (HeLa) with minimal toxicity to normal fibroblast cells (L929). The results suggest that the generation of ROS and Zn2+ ions are possibly responsible for the higher activity toward the depolarization of cell membrane potential, the lipid peroxidation in bacterial cells, depolarization of the mitochondrial membrane, and cell cycle arrest in the S phase in cancer cells.
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Affiliation(s)
| | - D. Bahadur
- Department of Metallurgical Engineering
and Materials Science, Indian Institute
of Technology Bombay, Mumbai 400076, India
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17
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Liang YC, Lo YR, Wang CC, Xu NC. Shell Layer Thickness-Dependent Photocatalytic Activity of Sputtering Synthesized Hexagonally Structured ZnO-ZnS Composite Nanorods. MATERIALS 2018; 11:ma11010087. [PMID: 29316671 PMCID: PMC5793585 DOI: 10.3390/ma11010087] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/13/2017] [Revised: 01/03/2018] [Accepted: 01/05/2018] [Indexed: 11/16/2022]
Abstract
ZnO-ZnS core-shell nanorods are synthesized by combining the hydrothermal method and vacuum sputtering. The core-shell nanorods with variable ZnS shell thickness (7-46 nm) are synthesized by varying ZnS sputtering duration. Structural analyses demonstrated that the as-grown ZnS shell layers are well crystallized with preferring growth direction of ZnS (002). The sputtering-assisted synthesized ZnO-ZnS core-shell nanorods are in a wurtzite structure. Moreover, photoluminance spectral analysis indicated that the introduction of a ZnS shell layer improved the photoexcited electron and hole separation efficiency of the ZnO nanorods. A strong correlation between effective charge separation and the shell thickness aids the photocatalytic behavior of the nanorods and improves their photoresponsive nature. The results of comparative degradation efficiency toward methylene blue showed that the ZnO-ZnS nanorods with the shell thickness of approximately 17 nm have the highest photocatalytic performance than the ZnO-ZnS nanorods with other shell layer thicknesses. The highly reusable catalytic efficiency and superior photocatalytic performance of the ZnO-ZnS nanorods with 17 nm-thick ZnS shell layer supports their potential for environmental applications.
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Affiliation(s)
- Yuan-Chang Liang
- Institute of Materials Engineering, National Taiwan Ocean University, Keelung 20224, Taiwan.
| | - Ya-Ru Lo
- Institute of Materials Engineering, National Taiwan Ocean University, Keelung 20224, Taiwan.
| | - Chein-Chung Wang
- Institute of Materials Engineering, National Taiwan Ocean University, Keelung 20224, Taiwan.
| | - Nian-Cih Xu
- Institute of Materials Engineering, National Taiwan Ocean University, Keelung 20224, Taiwan.
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18
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Xiong J, Li W, Gan Y, Wei Y, Cheng G, Dou S, Li Z. Extremely rapid engineering of zinc oxide nanoaggregates with structure-dependent catalytic capability towards removal of ciprofloxacin antibiotic. Inorg Chem Front 2018. [DOI: 10.1039/c8qi00435h] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
ZnO nanoaggregates with structure-dependent catalytic capability of removal of ciprofloxacin antibiotics were engineered by an extremely rapid polyol-mediated synthesis approach.
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Affiliation(s)
- Jinyan Xiong
- College of Chemistry and Chemical Engineering
- Hubei Key Laboratory of Biomass Fibers and Eco-dyeing & Finishing
- Wuhan Textile University
- Wuhan 430073
- China
| | - Wei Li
- College of Chemistry and Chemical Engineering
- Hubei Key Laboratory of Biomass Fibers and Eco-dyeing & Finishing
- Wuhan Textile University
- Wuhan 430073
- China
| | - Yixin Gan
- School of Chemistry and Environmental Engineering
- Wuhan Institute of Technology
- Wuhan 430073
- PR China
| | - Yi Wei
- School of Chemistry and Environmental Engineering
- Wuhan Institute of Technology
- Wuhan 430073
- PR China
| | - Gang Cheng
- School of Chemistry and Environmental Engineering
- Wuhan Institute of Technology
- Wuhan 430073
- PR China
| | - Shixue Dou
- Institute for Superconducting & Electronic Materials
- The University of Wollongong
- Australia
| | - Zhen Li
- Institute for Superconducting & Electronic Materials
- The University of Wollongong
- Australia
- State Key Laboratory of Radiation Medicine and Protection
- School of Radiation Medicine and Radiation Protection
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19
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Tan L, Wu W, Yin Q, Ke X, Qiao R, Tong G, Zhu L. Dimer-type heterostructure of Ag/Zn0.995Ni0.005O microspheres: Microwave-assisted synthesis and synergistic antibacterial activity. J IND ENG CHEM 2017. [DOI: 10.1016/j.jiec.2017.04.011] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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20
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Gupta J, Mohapatra J, Bahadur D. Visible light driven mesoporous Ag-embedded ZnO nanocomposites: reactive oxygen species enhanced photocatalysis, bacterial inhibition and photodynamic therapy. Dalton Trans 2017; 46:685-696. [DOI: 10.1039/c6dt03713e] [Citation(s) in RCA: 71] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The systemic diagram shows the mechanism of photocatalysis, bacterial inhibition and photodynamic therapy through the generation of reactive oxygen species.
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Affiliation(s)
- Jagriti Gupta
- Department of Metallurgical Engineering and Materials Science
- Indian Institute of Technology Bombay
- Mumbai – 400076
- India
| | - Jeotikanta Mohapatra
- Centre for Research in Nanotechnology and Science (CRNTS)
- Indian Institute of Technology Bombay
- Mumbai – 400076
- India
| | - D. Bahadur
- Department of Metallurgical Engineering and Materials Science
- Indian Institute of Technology Bombay
- Mumbai – 400076
- India
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21
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Feng Y, Liu L, Zhang J, Aslan H, Dong M. Photoactive antimicrobial nanomaterials. J Mater Chem B 2017; 5:8631-8652. [DOI: 10.1039/c7tb01860f] [Citation(s) in RCA: 129] [Impact Index Per Article: 18.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Nanomaterials for killing pathogenic bacteria under light irradiation.
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Affiliation(s)
- Yonghai Feng
- Institute for Advanced Materials
- Jiangsu University
- Zhenjiang 212013
- China
| | - Lei Liu
- Institute for Advanced Materials
- Jiangsu University
- Zhenjiang 212013
- China
| | - Jie Zhang
- Institute for Advanced Materials
- Jiangsu University
- Zhenjiang 212013
- China
| | - Hüsnü Aslan
- Interdisciplinary Nanoscience Center
- Universitas Arhusiensis
- Arhus 8200
- Denmark
| | - Mingdong Dong
- Interdisciplinary Nanoscience Center
- Universitas Arhusiensis
- Arhus 8200
- Denmark
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22
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Strong light scattering and broadband (UV to IR) photoabsorption in stretchable 3D hybrid architectures based on Aerographite decorated by ZnO nanocrystallites. Sci Rep 2016; 6:32913. [PMID: 27616632 PMCID: PMC5018730 DOI: 10.1038/srep32913] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2016] [Accepted: 08/17/2016] [Indexed: 11/23/2022] Open
Abstract
In present work, the nano- and microscale tetrapods from zinc oxide were integrated on the surface of Aerographite material (as backbone) in carbon-metal oxide hybrid hierarchical network via a simple and single step magnetron sputtering process. The fabricated hybrid networks are characterized for morphology, microstructural and optical properties. The cathodoluminescence investigations revealed interesting luminescence features related to carbon impurities and inherent host defects in zinc oxide. Because of the wide bandgap of zinc oxide and its intrinsic defects, the hybrid network absorbs light in the UV and visible regions, however, this broadband photoabsorption behavior extends to the infrared (IR) region due to the dependence of the optical properties of ZnO architectures upon size and shape of constituent nanostructures and their doping by carbon impurities. Such a phenomenon of broadband photoabsorption ranging from UV to IR for zinc oxide based hybrid materials is novel. Additionally, the fabricated network exhibits strong visible light scattering behavior. The developed Aerographite/nanocrystalline ZnO hybrid network materials, equipped with broadband photoabsorption and strong light scattering, are very promising candidates for optoelectronic technologies.
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23
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Yin Q, Wu W, Qiao R, Ke X, Hu Y, Li Z. Glucose-assisted transformation of Ni-doped-ZnO@carbon to a Ni-doped-ZnO@void@SiO2 core–shell nanocomposite photocatalyst. RSC Adv 2016. [DOI: 10.1039/c5ra26631a] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
Nanovoid core–shell structured Ni/ZnO@void@SiO2 was obtained using the carbon layer of Ni/ZnO@C as a sacrificial template.
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Affiliation(s)
- Qiaoqiao Yin
- College of Chemistry and Life Sciences
- Zhejiang Normal University
- Jinhua 321004
- China
| | - Wenjie Wu
- College of Chemistry and Life Sciences
- Zhejiang Normal University
- Jinhua 321004
- China
| | - Ru Qiao
- College of Chemistry and Life Sciences
- Zhejiang Normal University
- Jinhua 321004
- China
| | - Xiaoxia Ke
- College of Chemistry and Life Sciences
- Zhejiang Normal University
- Jinhua 321004
- China
| | - Yong Hu
- Institute of Physical Chemistry
- Zhejiang Normal University
- Jinhua 321004
- China
| | - Zhengquan Li
- Institute of Physical Chemistry
- Zhejiang Normal University
- Jinhua 321004
- China
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24
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Bumajdad A, Madkour M. In situ growth of ZnO nanoparticles in precursor-insensitive water-in-oil microemulsion as soft nanoreactors. NANOSCALE RESEARCH LETTERS 2015; 10:19. [PMID: 25852317 PMCID: PMC4312317 DOI: 10.1186/s11671-015-0730-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/21/2014] [Accepted: 01/03/2015] [Indexed: 06/04/2023]
Abstract
Zinc oxide (ZnO) nanostructures of uniform shapes and sizes (spherical, needle-like, and acicular) were directly synthesized using a relatively precursor-insensitive water-in-n-heptane microemulsion system stabilized by a mixture of cationic and non-ionic surfactants. With this colloidal system, the synthesized ZnO possesses the highest reported surface area (76 m(2) g(-1)) among the published reports utilizing other microemulsion systems. Such precursor insensitivity allowed studying the effect of Zn precursor:precipitating agent molar ratio (as high as 1:8) on the particle size, specific surface area, porosity, and morphology of the synthesized nanoparticles. The interaction of the cationic surfactant head groups and their Br(-) counter ions with Zn(2+) and OH(-) ions is believed to play a major role in controlling the ZnO characteristics. Due to such interactions, it is believed that the nucleation processes are retarded while the growth is more dominating if compared with other microemulsion systems.
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Affiliation(s)
- Ali Bumajdad
- Chemistry Department, Faculty of Science, Kuwait University, P.O. Box 5969, Safat, 13060 Kuwait
| | - Metwally Madkour
- Chemistry Department, Faculty of Science, Kuwait University, P.O. Box 5969, Safat, 13060 Kuwait
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25
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Gupta J, Bhargava P, Bahadur D. Fluorescent ZnO for imaging and induction of DNA fragmentation and ROS-mediated apoptosis in cancer cells. J Mater Chem B 2015; 3:1968-1978. [DOI: 10.1039/c4tb01661k] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Systemic diagram shows the cell death mechanism through the generation of reactive oxygen species.
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Affiliation(s)
- Jagriti Gupta
- Department of Metallurgical Engineering and Materials Science
- Indian Institute of Technology Bombay
- Mumbai – 400076
- India
| | - Parag Bhargava
- Department of Metallurgical Engineering and Materials Science
- Indian Institute of Technology Bombay
- Mumbai – 400076
- India
| | - D. Bahadur
- Department of Metallurgical Engineering and Materials Science
- Indian Institute of Technology Bombay
- Mumbai – 400076
- India
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26
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Pal S, Maiti S, Maiti UN, Chattopadhyay KK. Spontaneous hyper-branching in ZnO nanostructures: morphology dependent electron emission and light detection. RSC Adv 2015. [DOI: 10.1039/c5ra12838b] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The structure and intrinsic defect-induced electron field emission and photodetection are monitored in ZnO nanoforms with assorted morphology prepared in ambient conditions via a facile wet chemical approach.
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Affiliation(s)
- Shreyasi Pal
- Thin Films and Nanoscience Laboratory
- Department of Physics
- Jadavpur University
- Kolkata 700032
- India
| | - Soumen Maiti
- Thin Films and Nanoscience Laboratory
- Department of Physics
- Jadavpur University
- Kolkata 700032
- India
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27
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Yue D, Lu W, Jin L, Li C, Luo W, Wang M, Wang Z, Hao J. Controlled synthesis, asymmetrical transport behavior and luminescence properties of lanthanide doped ZnO mushroom-like 3D hierarchical structures. NANOSCALE 2014; 6:13795-13802. [PMID: 25293373 DOI: 10.1039/c4nr04359f] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Lanthanide doped ZnO mushroom-like 3D hierarchical structures have been fabricated by polyol-mediated method and characterized by various microstructural and optical techniques. The results indicate that the as-prepared ZnO:Ln(3+) (Ln = Tb, Eu) samples have a hexagonal phase structure and possess a mushroom-like 3D hierarchical morphology. The length of the whole mushroom from stipe bottom to pileus top is about 1.0 μm, and the diameters of pileus and stipe are about 0.8 μm and 0.4 μm, respectively. It is found that the flow of N2 is the key parameter for the formation of the novel ZnO structure and the addition of (NH4)2HPO4 has a prominent effect on the phase structure and the growth of mushroom-like morphology. The potential mechanism of forming this morphology is proposed. The pileus of the formed mushroom is assembled by several radial ZnO:Ln(3+) nanorods, whereas the stipe is composed of over layered ZnO:Ln(3+) nanosheets. Moreover, asymmetrical I-V characteristic curves of ZnO:Ln(3+) mushrooms indicate that the texture composition of the 3D hierarchical morphology might lead to the asymmetrical transport behavior of electrical conductivity. Lanthanide doped ZnO samples can exhibit red or green emission under the excitation of UV light.
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Affiliation(s)
- Dan Yue
- The Key Laboratory of Rare Earth Functional Materials and Applications, Zhoukou Normal University, Zhoukou 466001, P. R. China.
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28
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Shi X, Chen G, Chen D, Jin R, Xu H. PbSe hierarchical nanostructures: solvothermal synthesis, growth mechanism and their thermoelectric transportation properties. CrystEngComm 2014. [DOI: 10.1039/c4ce00714j] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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29
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Lan S, Liu L, Li R, Leng Z, Gan S. Hierarchical Hollow Structure ZnO: Synthesis, Characterization, and Highly Efficient Adsorption/Photocatalysis toward Congo Red. Ind Eng Chem Res 2014. [DOI: 10.1021/ie404053m] [Citation(s) in RCA: 100] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Shi Lan
- College
of Chemistry, Jilin University, Changchun 130026, People’s Republic of China
| | - Lu Liu
- College
of Chemistry, Jilin University, Changchun 130026, People’s Republic of China
| | - Ruiqing Li
- College
of Chemistry, Jilin University, Changchun 130026, People’s Republic of China
| | - Zhihua Leng
- College
of Chemistry, Jilin University, Changchun 130026, People’s Republic of China
| | - Shucai Gan
- College
of Chemistry, Jilin University, Changchun 130026, People’s Republic of China
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30
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Prakash A, Bahadur D. The role of ionic electrolytes on capacitive performance of ZnO-reduced graphene oxide nanohybrids with thermally tunable morphologies. ACS APPLIED MATERIALS & INTERFACES 2014; 6:1394-1405. [PMID: 24428304 DOI: 10.1021/am405031y] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
In the present work, the role of the reaction temperatures on the morphologies of zinc oxide-reduced graphene oxide (ZnO-RGO) nanohybrids and their supercapacitive performance in two different aqueous electrolytes (1.0 M KCl and Na2SO4) were investigated. The ZnO-RGO nanohybrids were synthesized at two different temperatures (ca. 95 and 145 °C) by solvothermal method and labeled as ZnO-RGO-1 and ZnO-RGO-2, respectively. The structure and composition of ZnO-RGO nanohybrids were confirmed by means of X-ray diffraction, electron microscopes (scanning and transmission), X-ray photoelectron, photoluminescence, and Raman spectroscopy. These results show that the temperature allows a good control on loading and morphology of ZnO nanoassemblies in ZnO-RGO nanohybrids and at elevated temperature of 145 °C, ZnO nanoassemblies break and get completely embedded into RGO matrices. The electrochemical performance of ZnO-RGO nanohybrids was examined by cyclic voltammograms (CVs), galvanostatic charge-discharge (chronopotentiometry) and electrochemical impedance spectroscopy (EIS) in 1.0 M KCl and Na2SO4 aqueous electrolytes respectively. Combining the EIS and zeta potential behavior, a direct link between the charge transfer resistance and electrical double layers is established which is responsible for excellent capacitive performance of ZnO-RGO-2. The ZnO-RGO-2 displays high specific capacitance (107.9 F/g, scan rate = 50 mVs(-1)) in 1.0 M KCl and exhibits merely 4.2% decay in specific capacitance values over 200 cycles.
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Affiliation(s)
- Anand Prakash
- Department of Metallurgical Engineering and Materials Science, Indian institute of Technology Bombay , Powai, Mumbai 400 076, India
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31
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Wang J, Hou S, Zhang L, Chen J, Xiang L. Ultra-rapid formation of ZnO hierarchical structures from dilution-induced supersaturated solutions. CrystEngComm 2014. [DOI: 10.1039/c4ce00765d] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
ZnO hierarchical structures assembled by tunable nanoscale building blocks such as nanorods, nanosheets and nanoparticles were synthesized from dilution-induced supersaturated solutions.
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Affiliation(s)
- Jing Wang
- Department of Chemical Engineering
- Tsinghua University
- Beijing, China
| | - Sichao Hou
- Department of Chemical Engineering
- Tsinghua University
- Beijing, China
| | - Lizhao Zhang
- Department of Chemical Engineering
- Tsinghua University
- Beijing, China
| | - Jincai Chen
- Department of Chemical Engineering
- Tsinghua University
- Beijing, China
| | - Lan Xiang
- Department of Chemical Engineering
- Tsinghua University
- Beijing, China
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32
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Prakash A, Bahadur D. Chemically derived defects in zinc oxide nanocrystals and their enhanced photo-electrocatalytic activities. Phys Chem Chem Phys 2014; 16:21429-37. [DOI: 10.1039/c4cp03583f] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Schematic illustration of ZnO NCs synthesized in DMF (ZnO-1), NMP (ZnO-2) and DMSO (ZnO-3), their charge–discharge behavior as well as degradation performance.
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Affiliation(s)
- Anand Prakash
- Department of Metallurgical Engineering and Materials Science
- Indian Institute of Technology Bombay
- Mumbai - 400 076, India
| | - D. Bahadur
- Department of Metallurgical Engineering and Materials Science
- Indian Institute of Technology Bombay
- Mumbai - 400 076, India
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33
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Kumar VB, Kumar K, Gedanken A, Paik P. Facile synthesis of self-assembled spherical and mesoporous dandelion capsules of ZnO: efficient carrier for DNA and anti-cancer drugs. J Mater Chem B 2014; 2:3956-3964. [DOI: 10.1039/c4tb00416g] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Idiosyncratic self-assembled dandelion mesoporous capsules have been synthesized with ZnO NPs and NRs. The {(ZnO)nδ+–(DOX)m} and {(ZnO)nδ+–(DNA)m} complexes are very useful for delivery of anticancer drugs and genes, respectively.
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Affiliation(s)
- Vijay Bhooshan Kumar
- School of Engineering Sciences and Technology
- University of Hyderabad
- Hyderabad 500 046, India
| | - Koushi Kumar
- School of Engineering Sciences and Technology
- University of Hyderabad
- Hyderabad 500 046, India
| | - Aharon Gedanken
- Institute for Nanotechnology and Advanced Materials
- Department of Chemistry
- Bar-Ilan University
- Ramat Gan, Israel
- Department of Materials Science and Engineering
| | - Pradip Paik
- School of Engineering Sciences and Technology
- University of Hyderabad
- Hyderabad 500 046, India
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34
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Chen L, Jiang D, He T, Wu Z, Chen M. In-situ ion exchange synthesis of hierarchical AgI/BiOI microsphere photocatalyst with enhanced photocatalytic properties. CrystEngComm 2013. [DOI: 10.1039/c3ce41038b] [Citation(s) in RCA: 97] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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35
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Zhan J, Dong H, Liu Y, Wang Y, Chen Z, Zhang L. A novel synthesis and excellent photodegradation of flower-like ZnO hierarchical microspheres. CrystEngComm 2013. [DOI: 10.1039/c3ce41754a] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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36
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Huang X, Xia J, Luan C, Sun M, Wang X, She GW, Lee CS, Meng XM. The structural and optical properties of a single ZnO comb and an individual nail-like tooth. CrystEngComm 2013. [DOI: 10.1039/c3ce41424h] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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