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Li L, Tao R, Liu Y, Zhou K, Fan X, Han Y, Tang L. Co3O4 nanoparticles/Bi2O3 nanosheets: One step synthesis, high-efficiency thermal catalytic performance, and catalytic mechanism research. MOLECULAR CATALYSIS 2022. [DOI: 10.1016/j.mcat.2022.112483] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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2
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Torkian N, Bahrami A, Hosseini-Abari A, Momeni MM, Abdolkarimi-Mahabadi M, Bayat A, Hajipour P, Amini Rourani H, Abbasi MS, Torkian S, Wen Y, Yazdan Mehr M, Hojjati-Najafabadi A. Synthesis and characterization of Ag-ion-exchanged zeolite/TiO 2 nanocomposites for antibacterial applications and photocatalytic degradation of antibiotics. ENVIRONMENTAL RESEARCH 2022; 207:112157. [PMID: 34619122 DOI: 10.1016/j.envres.2021.112157] [Citation(s) in RCA: 30] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2021] [Revised: 09/16/2021] [Accepted: 09/26/2021] [Indexed: 06/13/2023]
Abstract
This paper investigates the synthesis, antibacterial, and photocatalytic properties of silver ion-exchanged natural zeolite/TiO2 photocatalyst nanocomposite. Zeolite is known to have a porous surface structure, making it an ideal substrate and framework in different nanocomposites. Moreover, natural zeolite has a superior thermal and chemical stability, with hardly any reactivity with chemicals. Finding an effective and low-cost method to remove both antibiotics and bacteria from water resources has become a vital global issue due to the worldwide excessive use of chemicals and antibiotics. This research aims to propose a facile method to synthesize Ag-ion-exchanged zeolite/TiO2 catalyst for anti-bacterial purposes and photocatalytic removal of atibiotics from wastewaters. TiO2 particles were deposited on the surface of natural zeolite. Ag ion exchanging was performed via a liquid ion-exchange method using 0.1 M AgNO3 solution. X-ray diffractometry (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), and Fourier-transform infrared spectroscopy (FTIR) were used to evaluate the structure of synthesized powders. Antibacterial activities of samples were assessed, using Staphylococcus aureus ATCC 25923 and Escherichia coli ATCC 25922 by disc diffusion method. It was shown that Ag-containing nanocomposite samples have an improved antibacterial performance in both cases. Results showed that the synthesized catalyst has promising potentials in wastewater treatment.
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Affiliation(s)
- Niloufar Torkian
- Department of Chemical Engineering, Tafresh University, Tafresh 79611-39518, Iran
| | - Abbas Bahrami
- Department of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran.
| | - Afrouzossadat Hosseini-Abari
- Department of Cell and Molecular Biology and Microbiology, Faculty of Biological Science and Technology, University of Isfahan 817463441, Iran
| | | | | | - Ahmad Bayat
- Department of Chemical Engineering, Tafresh University, Tafresh 79611-39518, Iran
| | - Pejman Hajipour
- Department of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran
| | - Hamed Amini Rourani
- Department of Cell and Molecular Biology and Microbiology, Faculty of Biological Science and Technology, University of Isfahan 817463441, Iran
| | - Mohammad Saeid Abbasi
- Department of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran
| | - Sima Torkian
- Department of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran
| | - Yangping Wen
- Institute of Functional Materials and Agricultural Applied Chemistry, Jiangxi Agricultural University, Nanchang, 330045, China
| | - Maryam Yazdan Mehr
- Faculty EEMCS, Delft University of Technology, Mekelweg 4, 2628 CD Delft, the Netherlands
| | - Akbar Hojjati-Najafabadi
- College of Rare Earths, Jiangxi University of Science and Technology, No.86, Hongqi Ave., Ganzhou, Jiangxi, 341000, PR China; Faculty of Materials, Metallurgy and Chemistry, School of Materials Science and Engineering, Jiangxi University of Science and Technology, Ganzhou, 341000, PR China.
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Zhang Y, Su S, Zhang Y, Zhang X, Giusto P, Huang X, Liu J. Visible-Light-Driven Photocatalytic Water Disinfection Toward Escherichia coli by Nanowired g-C3N4 Film. FRONTIERS IN NANOTECHNOLOGY 2021. [DOI: 10.3389/fnano.2021.684788] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Graphitic carbon nitride (g-C3N4) as metal-free visible light photocatalyst has recently emerged as a promising candidate for water disinfection. Herein, a nanowire-rich superhydrophilic g-C3N4 film was prepared by a vapor-assisted confined deposition method. With a disinfection efficiency of over 99.99% in 4 h under visible light irradiation, this nanowire-rich g-C3N4 film was found to perform better than conventional g-C3N4 film. Control experiments showed that the disinfection performance of the g-C3N4 film reduced significantly after hydrophobic treatment. The potential disinfection mechanism was investigated through scavenger-quenching experiments, which indicate that H2O2 was the main active specie and played an important role in bacteria inactivation. Due to the metal-free composition and excellent performance, photocatalytic disinfection by nanowire-rich g-C3N4 film would be a promising and cost-effective way for safe drinking water production.
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Kadhim MJ, Mahdi MA, Hassan JJ, Al-Asadi AS. Photocatalytic activity and photoelectrochemical properties of Ag/ZnO core/shell nanorods under low-intensity white light irradiation. NANOTECHNOLOGY 2021; 32:195706. [PMID: 33545705 DOI: 10.1088/1361-6528/abe3b3] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Zinc oxide (ZnO) nanorod thin films were prepared by CBD onto glass and FTO/glass substrates. Silver (Ag) nanoparticles were synthesized on the surface of the prepared ZnO nanorod thin films using electrochemical methods. The scanning electron microscopy images of the Ag/ZnO/glass core/shell nanostructure confirmed that the average particles size is 20 nm while it was 41 nm for Ag NPs that synthesized onto ZnO/FTO NRs. The photocatalytic activity of the prepared Ag/ZnO core/shell nanostructure was studied by analyzing the degradation of methylene blue (MB) dye under visible light. Various pH values (6 and 10) and exposure time (30-240) min were controlled to investigate the photocatalytic activity of as-prepared Ag/ZnO core/shell nanostructure and that annealed at 200 °C and 300 °C for 1 h. It was observed that when the pH was 6, the degradation rate increased with the annealing temperature and irradiation time reaching 51% at the annealing temperature of 300 °C and exposure time of 240 min. In other hands, when the pH was 10, and the sample was annealed at 200 °C, it showed a good degradation rate of 100% at the irradiation time of 90 min. By contrast, the sample annealed at 300 °C required 180 min to degrade the MB dye completely. The photoelectrochemical cell measurement based on photocurrent density revealed a slight response to light. Cycle voltammetry (CV) measurement was conducted, and the CV curves of the Ag/ZnO core/shell electrodes indicated nonfaradaic and pseudocapacitance behavior. The electrodes showed nearly rectangular CV curves, which indicated the dominance of the nonfaradaic capacitance behavior. The specific capacitance of the electrodes remained at approximately 99%. Mott-Schottky analysis revealed that the semiconductor was an n-type with dependence on flat band potential V FB deviation in the negative direction.
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Affiliation(s)
- M J Kadhim
- Department of Physics, College of Science, University of Basrah, Basrah, Iraq
| | - M A Mahdi
- Department of Physics, College of Science, University of Basrah, Basrah, Iraq
| | - J J Hassan
- Department of Physics, College of Science, University of Basrah, Basrah, Iraq
| | - Ahmed S Al-Asadi
- Department of Physics, College of Education for Pure Science, University of Basrah, Iraq
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Owonubi SJ, Ateba CN, Revaprasadu N. Co-assembled ZnO-Fe 2O 3x-CuO x nano-oxide materials for antibacterial protection. PHOSPHORUS SULFUR 2020. [DOI: 10.1080/10426507.2020.1764955] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- S. J. Owonubi
- Department of Chemistry, University of Zululand, KwaDlangezwa, KwaZulu-Natal, South Africa
| | - Collins N. Ateba
- Department of Microbiology, Faculty of Natural and Agricultural Sciences, North-West University, Mmabatho, South Africa
| | - Neerish Revaprasadu
- Department of Chemistry, University of Zululand, KwaDlangezwa, KwaZulu-Natal, South Africa
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Zhu L, Pearson DW, Benoit SL, Xie J, Pant J, Yang Y, Mondal A, Handa H, Howe JY, Hung YC, Vidal JE, Maier RJ, Zhao Y. Highly Efficient Antimicrobial Activity of Cu xFe yO z Nanoparticles against Important Human Pathogens. NANOMATERIALS 2020; 10:nano10112294. [PMID: 33233512 PMCID: PMC7699552 DOI: 10.3390/nano10112294] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/24/2020] [Revised: 11/15/2020] [Accepted: 11/17/2020] [Indexed: 11/16/2022]
Abstract
The development of innovative antimicrobial materials is crucial in thwarting infectious diseases caused by microbes, as drug-resistant pathogens are increasing in both number and capacity to detoxify the antimicrobial drugs used today. An ideal antimicrobial material should inhibit a wide variety of bacteria in a short period of time, be less or not toxic to normal cells, and the fabrication or synthesis process should be cheap and easy. We report a one-step microwave-assisted hydrothermal synthesis of mixed composite CuxFeyOz (Fe2O3/Cu2O/CuO/CuFe2O) nanoparticles (NPs) as an excellent antimicrobial material. The 1 mg/mL CuxFeyOz NPs with the composition 36% CuFeO2, 28% Cu2O and 36% Fe2O3 have a general antimicrobial activity greater than 5 log reduction within 4 h against nine important human pathogenic bacteria (including drug-resistant bacteria as well as Gram-positive and Gram-negative strains). For example, they induced a >9 log reduction in Escherichia coli B viability after 15 min of incubation, and an ~8 log reduction in multidrug-resistant Klebsiella pneumoniae after 4 h incubation. Cytotoxicity tests against mouse fibroblast cells showed about 74% viability when exposed to 1 mg/mL CuxFeyOz NPs for 24 h, compared to the 20% viability for 1 mg/mL pure Cu2O NPs synthesized by the same method. These results show that the CuxFeyOz composite NPs are a highly efficient, low-toxicity and cheap antimicrobial material that has promising potential for applications in medical and food safety.
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Affiliation(s)
- Lu Zhu
- School of Chemical, Materials and Biomedical Engineering, College of Engineering, University of Georgia, Athens, GA 30602, USA; (L.Z.); (J.P.); (Y.Y.); (A.M.); (H.H.)
| | - David W. Pearson
- Department of Physics and Astronomy, University of Georgia, Athens, GA 30602, USA;
| | - Stéphane L. Benoit
- Department of Microbiology, University of Georgia, Athens, GA 30602, USA; (S.L.B.); (R.J.M.)
| | - Jing Xie
- Department of Food Science & Technology, University of Georgia, Griffin, GA 30223, USA; (J.X.); (Y.-C.H.)
| | - Jitendra Pant
- School of Chemical, Materials and Biomedical Engineering, College of Engineering, University of Georgia, Athens, GA 30602, USA; (L.Z.); (J.P.); (Y.Y.); (A.M.); (H.H.)
| | - Yanjun Yang
- School of Chemical, Materials and Biomedical Engineering, College of Engineering, University of Georgia, Athens, GA 30602, USA; (L.Z.); (J.P.); (Y.Y.); (A.M.); (H.H.)
| | - Arnab Mondal
- School of Chemical, Materials and Biomedical Engineering, College of Engineering, University of Georgia, Athens, GA 30602, USA; (L.Z.); (J.P.); (Y.Y.); (A.M.); (H.H.)
| | - Hitesh Handa
- School of Chemical, Materials and Biomedical Engineering, College of Engineering, University of Georgia, Athens, GA 30602, USA; (L.Z.); (J.P.); (Y.Y.); (A.M.); (H.H.)
| | - Jane Y. Howe
- Department of Materials Science & Engineering, University of Toronto, Toronto, ON M5S 1A1, Canada;
| | - Yen-Con Hung
- Department of Food Science & Technology, University of Georgia, Griffin, GA 30223, USA; (J.X.); (Y.-C.H.)
| | - Jorge E. Vidal
- Department of Microbiology and Immunology, University of Mississippi, Jackson, MS 39216, USA;
| | - Robert J. Maier
- Department of Microbiology, University of Georgia, Athens, GA 30602, USA; (S.L.B.); (R.J.M.)
| | - Yiping Zhao
- Department of Physics and Astronomy, University of Georgia, Athens, GA 30602, USA;
- Correspondence:
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7
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Thakur S, Neogi S. Effect of doped ZnO nanoparticles on bacterial cell morphology and biochemical composition. APPLIED NANOSCIENCE 2020. [DOI: 10.1007/s13204-020-01592-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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Shakerimoghaddam A, Razavi D, Rahvar F, Khurshid M, Ostadkelayeh SM, Esmaeili SA, Khaledi A, Eshraghi M. Evaluate the Effect of Zinc Oxide and Silver Nanoparticles on Biofilm and icaA Gene Expression in Methicillin-Resistant Staphylococcus aureus Isolated From Burn Wound Infection. J Burn Care Res 2020; 41:1253-1259. [PMID: 32479611 DOI: 10.1093/jbcr/iraa085] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Methicillin-resistant Staphylococcus aureus is the cause of nosocomial and community-acquired infections. This study aimed to evaluate the effect of zinc oxide and silver nanoparticles (ZnO-Ag NPs) on biofilms formation and icaA gene expression in methicillin-resistant S. aureus (MRSA). In this study, three standard strains (ATCC 43300, 25923, and 29913) and a clinical isolate are included. The minimum inhibitory concentration (MIC) of nanoparticles was determined by microdilution broth method. The antibacterial effects of ZnO-Ag NPs either alone or in combination with each other were compared with vancomycin (as the control group). The effect of MIC and sub-MIC concentrations of ZnO-Ag NPs on biofilm formation was determined by the microtiter plate method. The expression level of the icaA gene was assessed by real-time PCR LightCycler® 96 software (Version 1.1.0.1320, Roche, Germany). technique. All experiments were repeated three times. Data were analyzed using SPSS software through ANOVA and t-test. The P-value of less than .05 was considered as statistically significant. The average MICs of ZnO, Ag, and ZnO-Ag NPs compounds were 393.2, 179.8, and 60.8 μg/ml, respectively. The compound of ZnO-Ag NPs had a synergistic effect against all isolates. ZnO-Ag NPs decreased the biofilm formation rate at MIC and sub-MIC concentrations (P < .001). Sub-MIC ZnO-Ag NPs concentration significantly reduced the icaA gene expression in S. aureus strains (P < .03). The sub-MIC concentration of ZnO-Ag NPs reduced biofilm formation rate and icaA gene expression in Staphylococcus aureus strains compared with vancomycin. It can be used to cover medical devices after examining more clinical isolates to prevent bacterial colonization.
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Affiliation(s)
- Ali Shakerimoghaddam
- Infectious Diseases, Research Center, Kashan University of Medical Sciences, Iran.,Department of Microbiology and Immunology, Faculty of Medicine, Kashan University of Medical Sciences, Iran
| | - Delaramsadat Razavi
- Biology Department, Sciences Faculty, Science and Arts University, Yazd, Iran
| | - Farzaneh Rahvar
- Department of Medical Genetics, Institute of Medical Biotechnology, National Institute of Genetic Engineering and Biotechnology(NIGEB), Tehran, Iran
| | - Maria Khurshid
- Faculty of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | | | - Seyed-Alireza Esmaeili
- Immunology Research Center, Mashhad University of Medical Sciences, Iran.,Immunology Department, Faculty of Medicine, Mashhad University of Medical Sciences, Iran
| | - Azad Khaledi
- Infectious Diseases, Research Center, Kashan University of Medical Sciences, Iran.,Department of Microbiology and Immunology, Faculty of Medicine, Kashan University of Medical Sciences, Iran
| | - Mohsen Eshraghi
- Department of Thoracic Surgery, Qom University of Medical Sciences, Iran
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9
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Gao D, Zhao P, Lyu B, Li Y, Hou Y, Ma J. Carbon quantum dots decorated on ZnO nanoparticles: An efficient visible‐light responsive antibacterial agents. Appl Organomet Chem 2020. [DOI: 10.1002/aoc.5665] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Dangge Gao
- Shaanxi University of Science and Technology College of Bioresources Chemical and Material Engineering Xi'an Shaanxi 710021 China
- National Demonstration Center for Experimental Light Chemistry Engineering Education Shaanxi University of Science and Technology Shaanxi Xi'an 710021 China
| | - Ping Zhao
- Shaanxi University of Science and Technology College of Bioresources Chemical and Material Engineering Xi'an Shaanxi 710021 China
- National Demonstration Center for Experimental Light Chemistry Engineering Education Shaanxi University of Science and Technology Shaanxi Xi'an 710021 China
| | - Bin Lyu
- Shaanxi University of Science and Technology College of Bioresources Chemical and Material Engineering Xi'an Shaanxi 710021 China
- National Demonstration Center for Experimental Light Chemistry Engineering Education Shaanxi University of Science and Technology Shaanxi Xi'an 710021 China
| | - Yajuan Li
- Shaanxi University of Science and Technology College of Bioresources Chemical and Material Engineering Xi'an Shaanxi 710021 China
- National Demonstration Center for Experimental Light Chemistry Engineering Education Shaanxi University of Science and Technology Shaanxi Xi'an 710021 China
| | - Yelin Hou
- Shaanxi University of Science and Technology College of Bioresources Chemical and Material Engineering Xi'an Shaanxi 710021 China
- National Demonstration Center for Experimental Light Chemistry Engineering Education Shaanxi University of Science and Technology Shaanxi Xi'an 710021 China
| | - Jianzhong Ma
- Shaanxi University of Science and Technology College of Bioresources Chemical and Material Engineering Xi'an Shaanxi 710021 China
- National Demonstration Center for Experimental Light Chemistry Engineering Education Shaanxi University of Science and Technology Shaanxi Xi'an 710021 China
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Trang TNQ, Phan TB, Nam ND, Thu VTH. In Situ Charge Transfer at the Ag@ZnO Photoelectrochemical Interface toward the High Photocatalytic Performance of H 2 Evolution and RhB Degradation. ACS APPLIED MATERIALS & INTERFACES 2020; 12:12195-12206. [PMID: 32013392 DOI: 10.1021/acsami.9b15578] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Designing an efficient hybrid structure photocatalyst for photocatalytic decomposition and hydrogen (H2) evolution has been considered a great choice to develop renewable technologies for clean energy production and environmental remediation. Enhanced charge transfer (CT) based on the interaction between a noble metal and a semiconductor is a crucial factor influencing the movement of photogenerated electron-hole pairs. Herein, we focus on the recent advances related to plasmon-enhanced noble metals and the semiconductor nature to drive the photocatalytic H2 production and photodegradation of the organic dye rhodamine B (RhB) under UV and visible light irradiation. Specifically, the combination of concerted catalysis and green nanoengineering strategies to design ZnO-based composite photocatalysts and their decoration with metallic Ag have been realized by the radio frequency (RF) sputtering technique at room temperature. This simultaneity enhances the interface coupling between Ag and ZnO and reduces the energy threshold. The creation of charge transfer in the heterojunction and Schottky barrier changes the photoelectronic properties of the as-synthesized Al-doped ZnO (AZO); afterward, these effects promote the migration, transportation, and separation of photoinduced charge carriers and enhance the light-harvesting efficiency. As a result, the as-synthesized AZO-20 hybrid nanostructure exhibits a photocurrent density of 2.5 mA/cm2 vs Ag/AgCl, which is improved by almost 12 times compared with that of bare ZnO (0.2 mA/cm2). The hydrogen evolution rates of AZO-20 were ∼38 and ∼24 μmol/h under UV and visible light exposure, which are almost five- and tenfold higher than those of pristine ZnO, respectively. Additionally, the RhB degradation efficacies of the obtained AZO-20 were greater than almost 97 and 82% under UV and visible light illumination, respectively. The achieved apparent rate constant for the photocatalytic RhB decomposition was 0.014 min-1, indicating that it is 14-fold than that in pristine ZnO (0.001 min-1). Heterostructure AZO photocatalysts possess excellent practical stability in the water-splitting reaction and photocatalytic RhB decomposition, posing as promising candidates in practical works for pollution and energy challenges.
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Affiliation(s)
- Ton Nu Quynh Trang
- Faculty of Physics and Physics Engineering, University of Science, 227 Nguyen Van Cu Street, District 5, Ho Chi Minh City 700000, Vietnam
- Vietnam National University, Ho Chi Minh City 700000, Vietnam
| | - Thang Bach Phan
- Vietnam National University, Ho Chi Minh City 700000, Vietnam
- Center for Innovative Materials and Architectures, Ho Chi Minh City 700000, Vietnam
| | - Nguyen Dang Nam
- Future Materials & Devices Laboratory, Institute of Fundamental and Applied Sciences, Duy Tan University (DTU), Ho Chi Minh City 700000, Vietnam
| | - Vu Thi Hanh Thu
- Faculty of Physics and Physics Engineering, University of Science, 227 Nguyen Van Cu Street, District 5, Ho Chi Minh City 700000, Vietnam
- Vietnam National University, Ho Chi Minh City 700000, Vietnam
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Soltani S, Khanian N, Choong TSY, Rashid U. Recent progress in the design and synthesis of nanofibers with diverse synthetic methodologies: characterization and potential applications. NEW J CHEM 2020. [DOI: 10.1039/d0nj01071e] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
The advancements of nanotechnology, particularly nanomaterials science, have produced a broad range of nanomaterials including nanofibers, nanorods, nanowires and etc., which have been technically and practically examined over various applications.
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Affiliation(s)
- Soroush Soltani
- Department of Chemical and Environmental Engineering
- Universiti Putra Malaysia
- Malaysia
| | | | | | - Umer Rashid
- Institute of Advanced Technology
- Universiti Putra Malaysia
- Malaysia
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12
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Shen Z, Zhang Q, Yin C, Kang S, Jia H, Li X, Li X, Wang Y, Cui L. Facile synthesis of 3D flower-like mesoporous Ce-ZnO at room temperature for the sunlight-driven photocatalytic degradations of RhB and phenol. J Colloid Interface Sci 2019; 556:726-733. [PMID: 31499443 DOI: 10.1016/j.jcis.2019.08.111] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2019] [Revised: 08/27/2019] [Accepted: 08/29/2019] [Indexed: 10/26/2022]
Abstract
A 3D flower-like mesoporous Ce doped ZnO composite composed of nanosheets was prepared by a facile, one-step wet chemical method at room temperature. It was found that the moderate Ce doping can improve the light absorption of ZnO. The photocatalytic activities of the samples were studied by the degradation of Rhodamine B (RhB) and phenol under stimulated sunlight. The 1% mole ratio of Ce doped ZnO composites (denoted as CZ1) showed higher photocatalytic performance than other samples, where 85.1% of RhB and 69.6% of phenol can be removed within 125 min and 120 min, respectively. The Ce4+ doped in the lattice of ZnO can act as the electron trapping sites, which effectively improve the electron-hole separation. In addition, it was also found the annealing temperature had effect on the morphology and structure of Ce doped ZnO. The photocatalytic performance can be further enhanced at proper annealing temperature (500 °C) due to the increase of ZnO crystallinity with maintained flower-like structure and the formation of CeO2-ZnO heterojunction at their tight interface promoting the separation of photogenerated electron-hole pairs.
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Affiliation(s)
- Zhangfeng Shen
- School of Biological and Chemical Engineering, Jiaxing University, Jiaxing, Zhejiang 314001, PR China
| | - Qiulin Zhang
- School of Biological and Chemical Engineering, Jiaxing University, Jiaxing, Zhejiang 314001, PR China; Department of Environmental Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, PR China
| | - Chaochuang Yin
- School of Biological and Chemical Engineering, Jiaxing University, Jiaxing, Zhejiang 314001, PR China; Department of Environmental Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, PR China
| | - Shifei Kang
- Department of Environmental Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, PR China
| | - Hongyan Jia
- School of Biological and Chemical Engineering, Jiaxing University, Jiaxing, Zhejiang 314001, PR China
| | - Xing Li
- Department of Environmental Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, PR China
| | - Xi Li
- School of Biological and Chemical Engineering, Jiaxing University, Jiaxing, Zhejiang 314001, PR China
| | - Yangang Wang
- School of Biological and Chemical Engineering, Jiaxing University, Jiaxing, Zhejiang 314001, PR China.
| | - Lifeng Cui
- Department of Environmental Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, PR China.
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Kumar P, Huo P, Zhang R, Liu B. Antibacterial Properties of Graphene-Based Nanomaterials. NANOMATERIALS (BASEL, SWITZERLAND) 2019; 9:E737. [PMID: 31086043 PMCID: PMC6567318 DOI: 10.3390/nano9050737] [Citation(s) in RCA: 200] [Impact Index Per Article: 40.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/16/2019] [Revised: 05/07/2019] [Accepted: 05/08/2019] [Indexed: 02/06/2023]
Abstract
Bacteria mediated infections may cause various acute or chronic illnesses and antibiotic resistance in pathogenic bacteria has become a serious health problem around the world due to their excessive use or misuse. Replacement of existing antibacterial agents with a novel and efficient alternative is the immediate demand to alleviate this problem. Graphene-based materials have been exquisitely studied because of their remarkable bactericidal activity on a wide range of bacteria. Graphene-based materials provide advantages of easy preparation, renewable, unique catalytic properties, and exceptional physical properties such as a large specific surface area and mechanical strength. However, several queries related to the mechanism of action, significance of size and composition toward bacterial activity, toxicity criteria, and other issues are needed to be addressed. This review summarizes the recent efforts that have been made so far toward the development of graphene-based antibacterial materials to face current challenges to combat against the bacterial targets. This review describes the inherent antibacterial activity of graphene-family and recent advances that have been made on graphene-based antibacterial materials covering the functionalization with silver nanoparticles, other metal ions/oxides nanoparticles, polymers, antibiotics, and enzymes along with their multicomponent functionalization. Furthermore, the review describes the biosafety of the graphene-based antibacterial materials. It is hoped that this review will provide valuable current insight and excite new ideas for the further development of safe and efficient graphene-based antibacterial materials.
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Affiliation(s)
- Parveen Kumar
- Laboratory of Functional Molecules and Materials, School of Physics and Optoelectronic Engineering, Shandong University of Technology, Xincun West Road 266, Zibo 255000, China.
| | - Peipei Huo
- Laboratory of Functional Molecules and Materials, School of Physics and Optoelectronic Engineering, Shandong University of Technology, Xincun West Road 266, Zibo 255000, China.
| | - Rongzhao Zhang
- Analysis and Testing Center, Shandong University of Technology, Xincun West Road 266, Zibo 255000, China.
| | - Bo Liu
- Laboratory of Functional Molecules and Materials, School of Physics and Optoelectronic Engineering, Shandong University of Technology, Xincun West Road 266, Zibo 255000, China.
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Optimal Sr-Doped Free TiO2@SrTiO3 Heterostructured Nanowire Arrays for High-Efficiency Self-Powered Photoelectrochemical UV Photodetector Applications. CRYSTALS 2019. [DOI: 10.3390/cryst9030134] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Due to their high performance, photoelectrochemical ultraviolet (UV) photodetectors have attracted much attention, but the recombination of photogenerated electrons at the interface of photoanode/electrolyte limited further improvement of photoelectrochemical UV photodetectors (PEC UVPDs). Modification of TiO2 photoanode by SrTiO3 could improve the performance of UVPD, because the energy barrier that is established at the TiO2–SrTiO3 interface could accelerate the separation of the photogenerated electrons-holes pair. However, the recombination center that is caused by the preparation of TiO2@SrTiO3 core-shell heterostructured nanostructure decreases the performance of PEC UVPDs, which is still an important problem that hindered its application in PEC UVPDs. In this paper, we presented a Sr-doped free TiO2@SrTiO3 core-shell heterostructured nanowire arrays as a photoanode for the self-powered PEC UVPD. This will not only accelerate the separation of the photogenerated electrons-holes pair, but it will also reduce the recombination of photogenerated electron-hole pairs in the photoanode. The intrinsic effect of SrTiO3 reaction time on the J variations of UVPDs is investigated in detail. An impressive responsivity of 0.358 A W−1 was achieved at 360 nm for the UVPD based on TiO2@SrTiO3 core-shell heterostructured nanowire arrays, which heretofore is a considerably high photoresponsivity for self-powered photoelectrochemical UVPDs. Additionally, this UVPD also exhibits a high on/off ratio, fast response time, excellent visible-blind characteristic, and linear optical signal response.
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Teng Z, Yang N, Lv H, Wang S, Hu M, Wang C, Wang D, Wang G. Edge-Functionalized g-C3N4 Nanosheets as a Highly Efficient Metal-free Photocatalyst for Safe Drinking Water. Chem 2019. [DOI: 10.1016/j.chempr.2018.12.009] [Citation(s) in RCA: 141] [Impact Index Per Article: 28.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Studies of Effects of Calcination Temperature on the Crystallinity and Optical Properties of Ag-Doped ZnO Nanocomposites. JOURNAL OF COMPOSITES SCIENCE 2019. [DOI: 10.3390/jcs3010018] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Ag-doped ZnO nanocomposites are successfully synthesized at different calcination temperatures and times through a simple, effective, high-yield and low-cost mechanochemical combustion technique. Effects of calcination temperature on the crystallinity and optical properties of Ag/ZnO nanocomposites have been studied by X-ray diffraction (XRD), UV−visible diffuse reflectance spectroscopy (UV-DRS), photoluminescence spectroscopy (PL) and X-ray photoelectron spectroscopy (XPS). The XRD patterns of the synthesized Ag/ZnO exhibit a well-crystalline wurtzite ZnO crystal structure. The grain size of Ag/ZnO nanocomposites is found to be 19 and 46 nm at calcination temperatures of 400 °C and 700 °C, respectively. The maximum absorption in the UV region is obtained for Ag/ZnO nanocomposites synthesized at a calcination temperature of 500 °C for 3 h. The peak position of blue emissions is almost the same for the nanocomposites obtained at 300–700 °C calcination temperatures. The usual band edge emission in the UV is not obtained at 330 nm excitation. Band edge and blue band emissions are observed for the use of low excitation energy at 335–345 nm.
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González-Sánchez L, Gómez-Carrasco S, Santadaría AM, Wester R, Gianturco FA. Collisional Quantum Dynamics for MgH - ( 1Σ +) With He as a Buffer Gas: Ionic State-Changing Reactions in Cold Traps. Front Chem 2019; 7:64. [PMID: 30809520 PMCID: PMC6379277 DOI: 10.3389/fchem.2019.00064] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2019] [Accepted: 01/23/2019] [Indexed: 11/17/2022] Open
Abstract
We present in this paper a detailed theoretical and computational analysis of the quantum inelastic dynamics involving the lower rotational levels of the MgH− (X1Σ+) molecular anion in collision with He atoms which provide the buffer gas in a cold trap. The interaction potential between the molecular partner and the He (1S) gaseous atoms is obtained from accurate quantum chemical calculations at the post-Hartree-Fock level as described in this paper. The spatial features and the interaction strength of the present potential energy surface (PES) are analyzed in detail and in comparison with similar, earlier results involving the MgH+ (1Σ) cation interacting with He atoms. The quantum, multichannel dynamics is then carried out using the newly obtained PES and the final inelastic rats constants, over the range of temperatures which are expected to be present in a cold ion trap experiment, are obtained to generate the multichannel kinetics of population changes observed for the molecular ion during the collisional cooling process. The rotational populations finally achieved at specific temperatures are linked to state-selective laser photo-detachment experiments to be carried out in our laboratory.All intermediate steps of the quantum modeling are also compared with the behavior of the corresponding MgH+ cation in the trap and the marked differences which exist between the collisional dynamics of the two systems are dicussed and explained. The feasibility of the present anion to be involved in state-selective photo-detachment experiments is fully analyzed and suggestions are made for the best performing conditions to be selected during trap experiments.
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Affiliation(s)
| | | | | | - Roland Wester
- Department of Physics, Institut für Ionenphysik und Angewandte Physik, Universitaet Innsbruck, Innsbruck, Austria
| | - Francesco A Gianturco
- Department of Physics, Institut für Ionenphysik und Angewandte Physik, Universitaet Innsbruck, Innsbruck, Austria
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Jung JS, Ko SJ, Lee HB, Lee SB, Kim HJ, Oh JM. Hierarchical Ag Nanostructures Fabricated from Silver Coordination Polymers for Antibacterial Surface. Polymers (Basel) 2019; 11:E155. [PMID: 30960139 PMCID: PMC6401719 DOI: 10.3390/polym11010155] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2018] [Revised: 01/11/2019] [Accepted: 01/12/2019] [Indexed: 12/26/2022] Open
Abstract
A hierarchical silver nanostructure with improved antibacterial property was fabricated utilizing silver coordination polymer. Octadecanethiolate⁻silver polymer was synthesized to have a layered structure and was coated on silicon wafer by drop-casting method utilizing hydrophobic⁻hydrophobic interaction. Thus, the silver coordination polymer was calcined under reductive condition to produce zero-valent silver with a hierarchical nanostructure. X-ray diffraction patterns revealed that layered silver coordination polymer successfully transformed to hexagonal silver upon calcination. According to scanning electron and atomic force microscopy, silver coordination polymer with ~145.5 nm size was homogeneously coated on the surface before calcination, and it evolved micrometer-sized lumps and grooves which were composed of ~58.8 nm sized Ag nanoparticles. The hierarchical structure-micrometer lump/groove consisting of Ag nanoparticles-would be advantageous to kill bacteria; micrometer-grooves provide physical condition (pocket for bacteria capture) and the Ag nanoparticles from the neighboring lump endow chemical condition (antibacterial property of released Ag⁺). The antibacterial activity test on Escherichia coli via colony forming inhibitory assay indeed exhibited an improved antibacterial activity of hierarchical Ag nanostructure compared with the surface simply coated with Ag nanoparticles. From the line profile of atomic force microscopy, the bacterium trapped in the hierarchical Ag nanostructure was shown to interact intimately with Ag surface.
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Affiliation(s)
- Jin-Song Jung
- Department of Chemistry and Medical Chemistry, College of Science and Technology, Yonsei University, Wonju, Gangwondo 26493, Korea.
| | - Su-Joung Ko
- Department of Chemistry and Medical Chemistry, College of Science and Technology, Yonsei University, Wonju, Gangwondo 26493, Korea.
| | - Hong-Beom Lee
- Department of Chemistry and Medical Chemistry, College of Science and Technology, Yonsei University, Wonju, Gangwondo 26493, Korea.
| | - Su-Bin Lee
- Department of Chemistry and Medical Chemistry, College of Science and Technology, Yonsei University, Wonju, Gangwondo 26493, Korea.
| | - Hyoung-Jun Kim
- Department of Chemistry and Medical Chemistry, College of Science and Technology, Yonsei University, Wonju, Gangwondo 26493, Korea.
| | - Jae-Min Oh
- Department of Chemistry and Medical Chemistry, College of Science and Technology, Yonsei University, Wonju, Gangwondo 26493, Korea.
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Sivakumar P, Lee M, Kim YS, Shim MS. Photo-triggered antibacterial and anticancer activities of zinc oxide nanoparticles. J Mater Chem B 2018; 6:4852-4871. [PMID: 32255062 DOI: 10.1039/c8tb00948a] [Citation(s) in RCA: 66] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
ZnO nanoparticles (ZnO NPs) have gained more attention in recent years due to their ability to induce the generation of reactive oxygen species (ROS) under light irradiation. Photo-triggered ROS generation by ZnO NPs and the resulting phototoxicity in cells have found use in antibacterial and anticancer applications. This review highlights recent advances in the development of ZnO NPs and hybrid-type functionalized ZnO NPs for photo-triggered antibacterial and anticancer activities. In addition, various chemical modifications including metal doping, metal hybridization, modification with polymers, and sensitization by organic photosensitizers have been further introduced to enhance the photocatalytic efficiency and ROS generation capability of ZnO NPs. The enhanced ROS generation efficiency of modified ZnO NPs consequently increases their antibacterial and anticancer activities. Additionally, we offer some insights into the design and engineering of next-generation ZnO NPs for more effective antibacterial and anticancer applications.
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Affiliation(s)
- Padmanaban Sivakumar
- Division of Bioengineering, Incheon National University, Incheon 22012, Republic of Korea.
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20
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Xu S, Ren LF, Zhou Q, Bai H, Li J, Shao J. Facile ZIF-8 functionalized hierarchical micronanofiber membrane for high-efficiency separation of water-in-oil emulsions. J Appl Polym Sci 2018. [DOI: 10.1002/app.46462] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Si Xu
- School of Environmental Science and Engineering; Shanghai Jiao Tong University; Shanghai 200240 China
| | - Long-Fei Ren
- School of Environmental Science and Engineering; Shanghai Jiao Tong University; Shanghai 200240 China
| | - Qing Zhou
- School of Chemistry and Chemical Engineering; Shanghai Jiao Tong University; Shanghai 200240 China
| | - Hongwei Bai
- NANO SUN PTE LTD, 120 Pioneer Road #03-02, 639597; Singapore
| | - Jun Li
- School of Environmental Science and Engineering; Shanghai Jiao Tong University; Shanghai 200240 China
| | - Jiahui Shao
- School of Environmental Science and Engineering; Shanghai Jiao Tong University; Shanghai 200240 China
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21
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Zhang K, Li Z, Kang W, Deng N, Yan J, Ju J, Liu Y, Cheng B. Preparation and characterization of tree-like cellulose nanofiber membranes via the electrospinning method. Carbohydr Polym 2018; 183:62-69. [DOI: 10.1016/j.carbpol.2017.11.032] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2017] [Revised: 11/08/2017] [Accepted: 11/08/2017] [Indexed: 10/18/2022]
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22
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Oxygen Vacancy-Mediated ZnO Nanoparticle Photocatalyst for Degradation of Methylene Blue. APPLIED SCIENCES-BASEL 2018. [DOI: 10.3390/app8030353] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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23
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Varaprasad K. Co-assembled ZnO (shell) – CuO (core) nano-oxide materials for microbial protection. PHOSPHORUS SULFUR 2017. [DOI: 10.1080/10426507.2017.1417301] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Kokkarachedu Varaprasad
- Centro de Investigación de Polímeros Avanzados, CIPA, Avenida Collao 1202, Edificio de Laboratorios, Concepción, Chile
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Duan Y, Shen Y. Synthesis of ZnO-CuO/MCM-48 photocatalyst for the degradation of organic pollutions. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2017; 76:172-181. [PMID: 28708622 DOI: 10.2166/wst.2017.196] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The photocatalytic properties of ZnO-CuO catalysts supported on siliceous MCM-48 (Mobil Composition of Matter No. 48) for the degradation of organic pollutions such as methylene blue and salicylic acid under UV light irradiation were investigated. These catalysts were prepared by impregnation of MCM-48 with a mixed aqueous solution of copper acetate and zinc acetate. X-ray diffraction, N2-physisorption, high resolution transmission electron microscopy, scanning electron microscopy, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy and photoluminescence were used to characterize these samples. Results from characterizations showed that the addition of ZnO to CuO/MCM-48 could markedly improve the photocatalytic degradation properties. The enhanced photocatalytic behaviors of ZnO-CuO/MCM-48 may be due to the formation of p-n heterojunctions between ZnO and CuO, resulting in the effective separation of photogenerated electron-hole pairs. Moreover, the photocatalysts were easily recovered and reused for five cycles without considerable loss of activity.
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Affiliation(s)
- Yongzheng Duan
- College of Chemistry & Chemical Engineering, Binzhou University, Binzhou 256603, China E-mail:
| | - Yulian Shen
- Department of Traumatic Orthopedics, Binzhou People's Hospital, Binzhou 256600, China
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Ibrahim IM, Ali IM, Dheeb BI, Abas QA, Asmeit Ramizy, Eisa M, Aljameel A. Antifungal activity of wide band gap Thioglycolic acid capped ZnS:Mn semiconductor nanoparticles against some pathogenic fungi. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 73:665-669. [DOI: 10.1016/j.msec.2016.12.121] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2016] [Revised: 12/05/2016] [Accepted: 12/22/2016] [Indexed: 11/24/2022]
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26
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V LP, Vijayaraghavan R. Chemical manipulation of oxygen vacancy and antibacterial activity in ZnO. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 77:1027-1034. [PMID: 28531975 DOI: 10.1016/j.msec.2017.03.280] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2016] [Revised: 02/12/2017] [Accepted: 03/29/2017] [Indexed: 11/15/2022]
Abstract
Pure and doped ZnO (cation and anion doping) compositions have been designed in order to manipulate oxygen vacancy and antibacterial activity of ZnO. In this connection, we have synthesized and characterized micron sized ZnO, N doped micron sized ZnO, nano ZnO, nano Na and La doped ZnO. The intrinsic vacancies in pure ZnO and the vacancies created by N and Na doping in ZnO have been confirmed by X-ray Photoelectron Spectroscopy(XPS) and Photoluminiscence Spectroscopy(PL). Reactive oxygen species (ROS) such as hydroxyl radicals, superoxide radicals and H2O2 responsible for antibacterial activity have been estimated by PL, UV-Vis spectroscopy and KMnO4 titrations respectively. It was found that nano Na doped ZnO releases highest amount of ROS followed by nano ZnO, micron N doped ZnO while micron ZnO releases the least amount of ROS. The concentration of vacancies follows the same sequence. This illustrates directly the correlation between ROS and oxygen vacancy in well designed pure and doped ZnO. For the first time, material design in terms of cation doping and anion doping to tune oxygen vacancies has been carried out. Interaction energy (Eg), between the bacteria and nanoparticles has been calculated based on Extended Derjaguin-Landau-Verwey-Overbeek (EDLVO) theory and is correlated with antibacterial activity.
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Affiliation(s)
- Lakshmi Prasanna V
- Department of Chemistry, School of Advanced Sciences, VIT University, Vellore 632 014, Tamilnadu, India
| | - Rajagopalan Vijayaraghavan
- Department of Chemistry, School of Advanced Sciences, VIT University, Vellore 632 014, Tamilnadu, India.
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He Z, Wang D, Tang J, Song S, Chen J, Tao X. A quasi-hexagonal prism-shaped carbon nitride for photoreduction of carbon dioxide under visible light. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2017; 24:8219-8229. [PMID: 28155068 DOI: 10.1007/s11356-017-8497-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2016] [Accepted: 01/20/2017] [Indexed: 06/06/2023]
Abstract
A quasi-hexagonal prism-shaped carbon nitride (H-C3N4) was synthesized from urea-derived C3N4 (U-C3N4) using an alkaline hydrothermal process. U-C3N4 decomposition followed by hydrogen bond rearrangement of hydrolyzed products leads to the formation of a quasi-hexagonal prism-shaped structure. The H-C3N4 catalysts displayed superior activity in the photoreduction of CO2 with H2O compared to U-C3N4. The enhanced photocatalytic activities can be attributed to the promotion of incompletely coordinated nitrogen atom formation in the C3N4 molecules. Graphical abstract ᅟ.
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Affiliation(s)
- Zhiqiao He
- College of Environment, Zhejiang University of Technology, Hangzhou, 310032, People's Republic of China
| | - Danfen Wang
- College of Environment, Zhejiang University of Technology, Hangzhou, 310032, People's Republic of China
| | - Juntao Tang
- College of Environment, Zhejiang University of Technology, Hangzhou, 310032, People's Republic of China
| | - Shuang Song
- College of Environment, Zhejiang University of Technology, Hangzhou, 310032, People's Republic of China.
| | - Jianmeng Chen
- College of Environment, Zhejiang University of Technology, Hangzhou, 310032, People's Republic of China
| | - Xinyong Tao
- College of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou, 310014, People's Republic of China.
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28
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Zhao H, Kang W, Ma X, Deng N, Li Z, Cheng B. Fabrication and catalytic behavior of hierarchically-structured nylon 6 nanofiber membrane decorated with silver nanoparticles. CHINESE JOURNAL OF CATALYSIS 2017. [DOI: 10.1016/s1872-2067(16)62545-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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29
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Gao X, Liu X, Wang X, Zhu Z, Xie Z, Li J. Photodegradation of Unsymmetrical Dimethylhydrazine by TiO 2 Nanorod Arrays Decorated with CdS Nanoparticles Under Visible Light. NANOSCALE RESEARCH LETTERS 2016; 11:496. [PMID: 27832525 PMCID: PMC5104699 DOI: 10.1186/s11671-016-1718-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/02/2016] [Accepted: 11/04/2016] [Indexed: 05/30/2023]
Abstract
Photocatalysis technology could utilize solar energy to degrade many toxic pollutants and provides possibility to deal with unsymmetrical dimethylhydrazine (UDMH) wastewater with less energy consumption. In this study, well-aligned TiO2 nanorod arrays (TiO2 NRAs) were grown directly on transparent conductive glass (FTO) via a hydrothermal method, and TiO2 NRAs/CdS heterostructure films were prepared by decorating TiO2 NRAs with CdS nanoparticles through successive ion layer adsorption and reaction (SILAR). Under visible light, the TiO2 NRAs/CdS heterostructure displays enhanced photodegrading capacity compared with the bare TiO2 NRAs, and the highest photodegradation rate, 27.5% higher than that of the bare TiO2 NRAs, was achieved by the sample with 15 SILAR cycles. Additionally, the solution pH had some influence on the degradation process, which shows that the best degradation rate can be achieved in the neutral solution (pH is ca. 7.2), and the photodegradation process can be better in alkaline solution than in the acid solution. Moreover, the visible photocatalytic stability of the TiO2 NRAs/CdS sample was investigated. Finally, the underlying photocatalytic mechanism was discussed according to the photoelectrochemical and photoluminescence results.
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Affiliation(s)
- Xin Gao
- High-Tech Institute of Xi’an, Shaanxi, 710025 China
| | | | - Xuanjun Wang
- High-Tech Institute of Xi’an, Shaanxi, 710025 China
| | - Zuoming Zhu
- High-Tech Institute of Beijing, Beijing, 100085 China
| | - Zheng Xie
- High-Tech Institute of Xi’an, Shaanxi, 710025 China
| | - Jun Li
- High-Tech Institute of Xi’an, Shaanxi, 710025 China
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30
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Liu C, Kong D, Hsu PC, Yuan H, Lee HW, Liu Y, Wang H, Wang S, Yan K, Lin D, Maraccini PA, Parker KM, Boehm AB, Cui Y. Rapid water disinfection using vertically aligned MoS 2 nanofilms and visible light. NATURE NANOTECHNOLOGY 2016; 11:1098-1104. [PMID: 27525474 DOI: 10.1038/nnano.2016.138] [Citation(s) in RCA: 379] [Impact Index Per Article: 47.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/16/2015] [Accepted: 06/28/2016] [Indexed: 05/07/2023]
Abstract
Solar energy is readily available in most climates and can be used for water purification. However, solar disinfection of drinking water mostly relies on ultraviolet light, which represents only 4% of the total solar energy, and this leads to a slow treatment speed. Therefore, the development of new materials that can harvest visible light for water disinfection, and so speed up solar water purification, is highly desirable. Here we show that few-layered vertically aligned MoS2 (FLV-MoS2) films can be used to harvest the whole spectrum of visible light (∼50% of solar energy) and achieve highly efficient water disinfection. The bandgap of MoS2 was increased from 1.3 to 1.55 eV by decreasing the domain size, which allowed the FLV-MoS2 to generate reactive oxygen species (ROS) for bacterial inactivation in the water. The FLV-MoS2 showed a ∼15 times better log inactivation efficiency of the indicator bacteria compared with that of bulk MoS2, and a much faster inactivation of bacteria under both visible light and sunlight illumination compared with the widely used TiO2. Moreover, by using a 5 nm copper film on top of the FLV-MoS2 as a catalyst to facilitate electron-hole pair separation and promote the generation of ROS, the disinfection rate was increased a further sixfold. With our approach, we achieved water disinfection of >99.999% inactivation of bacteria in 20 min with a small amount of material (1.6 mg l-1) under simulated visible light.
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Affiliation(s)
- Chong Liu
- Department of Materials Science and Engineering, Stanford University, Stanford, California 94305, USA
| | - Desheng Kong
- Department of Materials Science and Engineering, Stanford University, Stanford, California 94305, USA
| | - Po-Chun Hsu
- Department of Materials Science and Engineering, Stanford University, Stanford, California 94305, USA
| | - Hongtao Yuan
- Department of Materials Science and Engineering, Stanford University, Stanford, California 94305, USA
| | - Hyun-Wook Lee
- Department of Materials Science and Engineering, Stanford University, Stanford, California 94305, USA
| | - Yayuan Liu
- Department of Materials Science and Engineering, Stanford University, Stanford, California 94305, USA
| | - Haotian Wang
- Department of Applied Physics, Stanford University, Stanford, California 94305, USA
| | - Shuang Wang
- Department of Electrical Engineering, Stanford University, Stanford, California 94305, USA
| | - Kai Yan
- Department of Materials Science and Engineering, Stanford University, Stanford, California 94305, USA
| | - Dingchang Lin
- Department of Materials Science and Engineering, Stanford University, Stanford, California 94305, USA
| | - Peter A Maraccini
- Department of Civil and Environmental Engineering, Stanford University, Stanford, California 94305, USA
| | - Kimberly M Parker
- Department of Civil and Environmental Engineering, Stanford University, Stanford, California 94305, USA
| | - Alexandria B Boehm
- Department of Civil and Environmental Engineering, Stanford University, Stanford, California 94305, USA
| | - Yi Cui
- Department of Materials Science and Engineering, Stanford University, Stanford, California 94305, USA
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94305, USA
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Ji H, Sun H, Qu X. Antibacterial applications of graphene-based nanomaterials: Recent achievements and challenges. Adv Drug Deliv Rev 2016; 105:176-189. [PMID: 27129441 DOI: 10.1016/j.addr.2016.04.009] [Citation(s) in RCA: 253] [Impact Index Per Article: 31.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2015] [Revised: 04/05/2016] [Accepted: 04/10/2016] [Indexed: 12/19/2022]
Abstract
Graphene has emerged as a novel green broad-spectrum antibacterial material, with little bacterial resistance and tolerable cytotoxic effect on mammalian cells. It exerts its antibacterial action via physical damages such as direct contact of its sharp edges with bacterial membranes and destructive extraction of lipid molecules. These damages also include wrapping and photothermal ablation mechanisms. Alternatively, chemical damage of bacteria is caused by oxidative stress with the generation of reactive oxygen species and charge transfer. Furthermore, graphene has been used as a support to disperse and stabilize various nanomaterials, such as metals, metal oxides, and polymers, with high antibacterial efficiency due to the synergistic effect. In addition, graphene-based antibiotic drug delivery platforms have been constructed. Due to the superior antibacterial properties and good biocompatibility, graphene-based nanocomposites have a wide range of applications, such as antibacterial packaging, wound dressing, and water disinfection. In this review, we highlight the antibacterial mechanism of graphene and summarize recent advances related to the antibacterial activity of graphene-based materials. Many of the recent application examples are further discussed. We hope that this review provides valuable insight, stimulates broader concerns, and spurs further developments in this promising field.
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Enhanced photoelectrochemical and photocatalytic behaviors of MFe2O4 (M = Ni, Co, Zn and Sr) modified TiO2 nanorod arrays. Sci Rep 2016; 6:30543. [PMID: 27464888 PMCID: PMC4964351 DOI: 10.1038/srep30543] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2016] [Accepted: 07/06/2016] [Indexed: 11/08/2022] Open
Abstract
Modified TiO2 nanomaterials are considered to be promising in energy conversion and ferrites modification may be one of the most efficient modifications. In this research, various ferrites, incorporated with various cations (MFe2O4, M = Ni, Co, Zn, and Sr), are utilized to modify the well aligned TiO2 nanorod arrays (NRAs), which is synthesized by hydrothermal method. It is found that all MFe2O4/TiO2 NRAs show obvious red shift into the visible light region compared with the TiO2 NRAs. In particular, NiFe2O4 modification is demonstrated to be the best way to enhance the photoelectrochemical and photocatalytic activity of TiO2 NRAs. Furthermore, the separation and transfer of charge carriers after MFe2O4 modification are clarified by electrochemical impedance spectroscopy measurements. Finally, the underlying mechanism accounting for the enhanced photocatalytic activity of MFe2O4/TiO2 NRAs is proposed. Through comparison among different transition metals modified TiO2 with the same synthesis process and under the same evaluating condition, this work may provide new insight in designing modified TiO2 nanomaterials as visible light active photocatalysts.
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Cai Q, Gao Y, Gao T, Lan S, Simalou O, Zhou X, Zhang Y, Harnoode C, Gao G, Dong A. Insight into Biological Effects of Zinc Oxide Nanoflowers on Bacteria: Why Morphology Matters. ACS APPLIED MATERIALS & INTERFACES 2016; 8:10109-10120. [PMID: 27042940 DOI: 10.1021/acsami.5b11573] [Citation(s) in RCA: 61] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Zinc oxides have gained exciting achievements in antimicrobial fields because of their advantageous properties, whereas their biological effects on bacteria are currently underexplored. In this study, biological effects of flower-shaped nano zinc oxides on bacteria were systematically investigated. Zinc oxide nanoflowers with controllable morphologies (viz., rod flowers, fusiform flowers, and petal flowers) were synthesized by modulating merely base type and concentration using the hydrothermal process. Their antibacterial power is in an order of petal flowers > fusiform flowers > rod flowers because of their differences in microscopic parameters such as specific surface area, pore size, and Zn-polar plane, etc. More importantly, the role of morphology in influencing biological effect on bacteria was examined, focusing on the morphology-induced effect on integrality of cell wall, permeability of cell membrane, DNA cleavage, etc. As for cytotoxicity, all petal flowers, fusiform flowers, and rod flowers show trivial cytotoxicity to the Hela cells. This work provides a guide for enhancing biological effect of the biocides on pathogenic bacteria by the morphological modulation.
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Affiliation(s)
- Qian Cai
- College of Chemistry and Chemical Engineering, Inner Mongolia University , Hohhot 010021, People's Republic of China
| | - Yangyang Gao
- College of Chemistry and Chemical Engineering, Inner Mongolia University , Hohhot 010021, People's Republic of China
| | - Tianyi Gao
- College of Chemistry and Chemical Engineering, Inner Mongolia University , Hohhot 010021, People's Republic of China
| | - Shi Lan
- College of Science, Inner Mongolia Agricultural University , Hohhot 010018, People's Republic of China
| | - Oudjaniyobi Simalou
- Département de Chimie, Faculté Des Sciences (FDS), Université de Lomé (UL) , Lome BP 1515, Togo
| | - Xinyue Zhou
- College of Chemistry and Chemical Engineering, Inner Mongolia University , Hohhot 010021, People's Republic of China
| | - Yanling Zhang
- College of Chemistry and Chemical Engineering, Inner Mongolia University , Hohhot 010021, People's Republic of China
| | - Chokto Harnoode
- College of Chemistry and Chemical Engineering, Inner Mongolia University , Hohhot 010021, People's Republic of China
| | - Ge Gao
- College of Chemistry, Jilin University , Changchun 130021, People's Republic of China
| | - Alideertu Dong
- College of Chemistry and Chemical Engineering, Inner Mongolia University , Hohhot 010021, People's Republic of China
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34
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Li Y, Wang L, Ge J, Wang J, Li Q, Wan W, Zhang B, Liu X, Xue W. Graphene quantum dots modified ZnO + Cu heterostructure photocatalysts with enhanced photocatalytic performance. RSC Adv 2016. [DOI: 10.1039/c6ra15707f] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
GQDs surface modified ZnO + Cu heterostructure photocatalysts was prepared via a simple spin-coating and annealing process, which exhibits enhanced photocatalytic performance.
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Affiliation(s)
- Yan Li
- School of Materials Science and Engineering
- University of Science and Technology Beijing
- Beijing 100083
- China
| | - Lifeng Wang
- School of Materials Science and Engineering
- University of Science and Technology Beijing
- Beijing 100083
- China
| | - Juan Ge
- School of Materials Science and Engineering
- University of Science and Technology Beijing
- Beijing 100083
- China
| | - Jun Wang
- School of Materials Science and Engineering
- University of Science and Technology Beijing
- Beijing 100083
- China
| | - Qiyao Li
- School of Materials Science and Engineering
- University of Science and Technology Beijing
- Beijing 100083
- China
| | - Wan Wan
- School of Materials Science and Engineering
- University of Science and Technology Beijing
- Beijing 100083
- China
| | - Boping Zhang
- School of Materials Science and Engineering
- University of Science and Technology Beijing
- Beijing 100083
- China
| | - Xiaoguang Liu
- School of Materials Science and Engineering
- University of Science and Technology Beijing
- Beijing 100083
- China
| | - Wendong Xue
- School of Materials Science and Engineering
- University of Science and Technology Beijing
- Beijing 100083
- China
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35
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Bai H, Zan X, Zhang L, Sun DD. Multi-functional CNT/ZnO/TiO2 nanocomposite membrane for concurrent filtration and photocatalytic degradation. Sep Purif Technol 2015. [DOI: 10.1016/j.seppur.2015.10.016] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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36
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Tan BYL, Tai MH, Juay J, Liu Z, Sun D. A study on the performance of self-cleaning oil–water separation membrane formed by various TiO2 nanostructures. Sep Purif Technol 2015. [DOI: 10.1016/j.seppur.2015.09.060] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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37
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Yang L, Wang S, Peng S, Jiang H, Zhang Y, Deng W, Tan Y, Ma M, Xie Q. Facile Fabrication of Graphene-Containing Foam as a High-Performance Anode for Microbial Fuel Cells. Chemistry 2015; 21:10634-8. [DOI: 10.1002/chem.201501772] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2015] [Indexed: 12/17/2022]
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38
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Knut R, Lagerqvist U, Palmgren P, Pal P, Svedlindh P, Pohl A, Karis O. Photoinduced reduction of surface states in Fe:ZnO. J Chem Phys 2015; 142:204703. [DOI: 10.1063/1.4921570] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Affiliation(s)
- R. Knut
- Department of Physics and Astronomy, Uppsala University, P.O. Box 516, SE-751 20 Uppsala, Sweden
| | - U. Lagerqvist
- Department of Chemistry Ångström, Uppsala University, P.O. Box 538, SE-751 21 Uppsala, Sweden
| | - P. Palmgren
- Department of Physics and Astronomy, Uppsala University, P.O. Box 516, SE-751 20 Uppsala, Sweden
| | - P. Pal
- MAX-Laboratory, Lund University, P.O. Box 118, SE-221 00 Lund, Sweden
- CSIR-National Physical Laboratory, Dr. K. S. Krishnan Road, New Delhi 110012, India
| | - P. Svedlindh
- Department of Engineering Sciences, Uppsala University, P.O. Box 534, SE-75121 Uppsala, Sweden
| | - A. Pohl
- Department of Chemistry Ångström, Uppsala University, P.O. Box 538, SE-751 21 Uppsala, Sweden
| | - O. Karis
- Department of Physics and Astronomy, Uppsala University, P.O. Box 516, SE-751 20 Uppsala, Sweden
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39
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Bai H, Zan X, Juay J, Sun DD. Hierarchical heteroarchitectures functionalized membrane for high efficient water purification. J Memb Sci 2015. [DOI: 10.1016/j.memsci.2014.10.036] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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40
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Li Z, Zhang F, Meng A, Xie C, Xing J. ZnO/Ag micro/nanospheres with enhanced photocatalytic and antibacterial properties synthesized by a novel continuous synthesis method. RSC Adv 2015. [DOI: 10.1039/c4ra12319k] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A continuous concentric impinging stream method was used for preparing ZnO/Ag MNSs, which possessed excellent photocatalytic and antibacterial activities.
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Affiliation(s)
- Zhenjiang Li
- Key Laboratory of Nanostructured Materials
- College of Materials Science and Engineering
- Qingdao University of Science and Technology
- Qingdao 266042
- P. R. China
| | - Fenghua Zhang
- Key Laboratory of Nanostructured Materials
- College of Materials Science and Engineering
- Qingdao University of Science and Technology
- Qingdao 266042
- P. R. China
| | - Alan Meng
- State Key Laboratory Base of Eco-chemical Engineering
- College of Chemistry and Molecular Engineering
- Qingdao University of Science and Technology
- Qingdao 266042
- P. R. China
| | - Cuicui Xie
- Key Laboratory of Polymer Material Advanced Manufacturings Technology of Shandong Provincial
- Qingdao University of Science and Technology
- Qingdao 266061
- P. R. China
| | - Jing Xing
- State Key Laboratory Base of Eco-chemical Engineering
- College of Chemistry and Molecular Engineering
- Qingdao University of Science and Technology
- Qingdao 266042
- P. R. China
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41
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Cheng H, Ye J, Sun Y, Yuan W, Tian J, Bogale RF, Tian P, Ning G. Template-induced synthesis and superior antibacterial activity of hierarchical Ag/TiO2composites. RSC Adv 2015. [DOI: 10.1039/c5ra16092h] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Abstract
Hierarchical Ag/TiO2composites were successfully synthesizedviahydrated magnesium carbonate hydroxide template-induced route, which exhibit superior and long-term antimicrobial activity.
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Affiliation(s)
- Hang Cheng
- State Key Laboratory of Fine Chemicals
- School of Chemical Engineering
- Dalian University of Technology
- Dalian 116012
- P. R. China
| | - Junwei Ye
- State Key Laboratory of Fine Chemicals
- School of Chemical Engineering
- Dalian University of Technology
- Dalian 116012
- P. R. China
| | - Yuan Sun
- State Key Laboratory of Fine Chemicals
- School of Chemical Engineering
- Dalian University of Technology
- Dalian 116012
- P. R. China
| | - Wenjie Yuan
- School of Live Science and Biotechnology
- Dalian University of Technology
- Dalian 116012
- P. R. China
| | - Junying Tian
- State Key Laboratory of Fine Chemicals
- School of Chemical Engineering
- Dalian University of Technology
- Dalian 116012
- P. R. China
| | - Raji Feyisa Bogale
- State Key Laboratory of Fine Chemicals
- School of Chemical Engineering
- Dalian University of Technology
- Dalian 116012
- P. R. China
| | - Peng Tian
- State Key Laboratory of Fine Chemicals
- School of Chemical Engineering
- Dalian University of Technology
- Dalian 116012
- P. R. China
| | - Guiling Ning
- State Key Laboratory of Fine Chemicals
- School of Chemical Engineering
- Dalian University of Technology
- Dalian 116012
- P. R. China
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42
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Liang Y, Guo N, Li L, Li R, Ji G, Gan S. Preparation of porous 3D Ce-doped ZnO microflowers with enhanced photocatalytic performance. RSC Adv 2015. [DOI: 10.1039/c5ra08519e] [Citation(s) in RCA: 75] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Porous 3D Ce-doped ZnO microflowers were fabricated using a low temperature hydrothermal method followed by heat treatment for the first time. The influence of the Ce dopant on the structural and photocatalytic properties was investigated.
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Affiliation(s)
- Yimai Liang
- College of Chemistry
- Jilin University
- Changchun 130026
- P. R. China
| | - Na Guo
- College of Chemistry
- Jilin University
- Changchun 130026
- P. R. China
| | - Linlin Li
- College of Chemistry
- Jilin University
- Changchun 130026
- P. R. China
| | - Ruiqing Li
- College of Chemistry
- Jilin University
- Changchun 130026
- P. R. China
| | - Guijuan Ji
- College of Chemistry
- Jilin University
- Changchun 130026
- P. R. China
| | - Shucai Gan
- College of Chemistry
- Jilin University
- Changchun 130026
- P. R. China
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43
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Chen X, Huang X, Zheng C, Liu Y, Xu T, Liu J. Preparation of different sized nano-silver loaded on functionalized graphene oxide with highly effective antibacterial properties. J Mater Chem B 2015; 3:7020-7029. [DOI: 10.1039/c5tb00280j] [Citation(s) in RCA: 86] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The synthesis of GO@PEG@AgNPs composites: step 1, synthesis of single-layer GO, step 2, the amidation reaction between carboxylic groups of GO and amine group of PEG to synthesize GO@PEG, step 3, GO@PEG in the presence the silver nitrate produces a GO@PEG@AgNPs composites.
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Affiliation(s)
- Xu Chen
- Department of Chemistry
- Jinan University
- Guangzhou 510632
- China
| | - Xiaoquan Huang
- Department of Chemistry
- Jinan University
- Guangzhou 510632
- China
| | - Chuping Zheng
- Department of Chemistry
- Jinan University
- Guangzhou 510632
- China
| | - Yanan Liu
- Department of Chemistry
- Jinan University
- Guangzhou 510632
- China
- Department of Applied Biology & Chemical Technology
| | - Taoyuan Xu
- Department of Chemistry
- Jinan University
- Guangzhou 510632
- China
| | - Jie Liu
- Department of Chemistry
- Jinan University
- Guangzhou 510632
- China
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44
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Zhang M, Wang P, Sun H, Wang Z. Superhydrophobic surface with hierarchical architecture and bimetallic composition for enhanced antibacterial activity. ACS APPLIED MATERIALS & INTERFACES 2014; 6:22108-22115. [PMID: 25418198 DOI: 10.1021/am505490w] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Developing robust antibacterial materials is of importance for a wide range of applications such as in biomedical engineering, environment, and water treatment. Herein we report the development of a novel superhydrophobic surface featured with hierarchical architecture and bimetallic composition that exhibits enhanced antibacterial activity. The surface is created using a facile galvanic replacement reaction followed by a simple thermal oxidation process. Interestingly, we show that the surface's superhydrophobic property naturally allows for a minimal bacterial adhesion in the dry environment, and also can be deactivated in the wet solution to enable the release of biocidal agents. In particular, we demonstrate that the higher solubility nature of the thermal oxides created in the thermal oxidation process, together with the synergistic cooperation of bimetallic composition and hierarchical architecture, allows for the release of metal ions in a sustained and accelerated manner, leading to enhanced antibacterial performance in the wet condition as well. We envision that the ease of fabrication, the versatile functionalities, and the robustness of our surface will make it appealing for broad applications.
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Affiliation(s)
- Mei Zhang
- Department of Mechanical and Biomedical Engineering and ‡Department of Biology and Chemistry, City University of Hong Kong , Hong Kong, China
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45
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Hsu MH, Chang CJ. Ag-doped ZnO nanorods coated metal wire meshes as hierarchical photocatalysts with high visible-light driven photoactivity and photostability. JOURNAL OF HAZARDOUS MATERIALS 2014; 278:444-53. [PMID: 24997260 DOI: 10.1016/j.jhazmat.2014.06.038] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2014] [Revised: 06/10/2014] [Accepted: 06/11/2014] [Indexed: 05/25/2023]
Abstract
Ag-doped ZnO nanorods were grown on stainless-steel wire meshes to fabricate the hierarchical photocatalysts with excellent visible light driven activity and anti-photocorrosion property. Effects of Ag doping and the surface structure on the surface chemistry, surface wetting properties, absorption band shift, photoelectrochemical response, and photocatalytic decolorization properties of the hierarchical photocatalysts, together with the stability of photocatalytic activity for recycled photocatalysts were investigated. Ag doping leads to red-shift in the absorption band and increased visible light absorption. Nanorods coated wire meshes hierarchical structure not only increases the surface area of photocatalysts but also makes the surface hydrophilic. The photocatalytic activity enhancement and reduced photocorrosion can be achieved because of increased surface area, enhanced hydrophilicity, and the interaction between the metal wire/ZnO and Ag/ZnO heterostructure interface which can improve the charge separation of photogenerated charge carriers.
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Affiliation(s)
- Mu-Hsiang Hsu
- Department of Chemical Engineering, Feng Chia University, 100, Wenhwa Road, Seatwen, Taichung 40724, Taiwan, ROC
| | - Chi-Jung Chang
- Department of Chemical Engineering, Feng Chia University, 100, Wenhwa Road, Seatwen, Taichung 40724, Taiwan, ROC.
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46
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Enhanced photocatalytic activity of Ce-doped ZnO nanorods under UV and visible light. J Taiwan Inst Chem Eng 2014. [DOI: 10.1016/j.jtice.2014.03.008] [Citation(s) in RCA: 64] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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47
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Busser GW, Mei B, Pougin A, Strunk J, Gutkowski R, Schuhmann W, Willinger MG, Schlögl R, Muhler M. Photodeposition of copper and chromia on gallium oxide: the role of co-catalysts in photocatalytic water splitting. CHEMSUSCHEM 2014; 7:1030-1034. [PMID: 24591306 DOI: 10.1002/cssc.201301065] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2013] [Revised: 01/09/2014] [Indexed: 06/03/2023]
Abstract
Split second: The photocatalytic activity of gallium oxide (β-Ga2 O3) depends strongly on the co-catalysts CuOx and chromia, which can be efficiently deposited in a stepwise manner by photoreduction of Cu(2+) and CrO4 (2-). The water-splitting activity can be tuned by varying the Cu loading in the range 0.025-1.5 wt %, whereas the Cr loading is not affecting the rate as long as small amounts (such as 0.05 wt %) are present. Chromia is identified as highly efficient co-catalyst in the presence of CuOx : it is essential for the oxidation of water.
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Affiliation(s)
- G Wilma Busser
- Laboratory of Industrial Chemistry, Ruhr-Universität Bochum, Universitätsstr. 150, 44780 Bochum (Germany), Fax: (+49) 0234-32-14115
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48
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Suyana P, Kumar SN, Kumar BSD, Nair BN, Pillai SC, Mohamed AP, Warrier KGK, Hareesh US. Antifungal properties of nanosized ZnS particles synthesised by sonochemical precipitation. RSC Adv 2014. [DOI: 10.1039/c3ra46642f] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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49
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Wang P, Zhao J, Xuan R, Wang Y, Zou C, Zhang Z, Wan Y, Xu Y. Flexible and monolithic zinc oxide bionanocomposite foams by a bacterial cellulose mediated approach for antibacterial applications. Dalton Trans 2014; 43:6762-8. [DOI: 10.1039/c3dt52858h] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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50
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Zhang Y, Gao X, Zhi L, Liu X, Jiang W, Sun Y, Yang J. The synergetic antibacterial activity of Ag islands on ZnO (Ag/ZnO) heterostructure nanoparticles and its mode of action. J Inorg Biochem 2014; 130:74-83. [DOI: 10.1016/j.jinorgbio.2013.10.004] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2013] [Revised: 10/04/2013] [Accepted: 10/04/2013] [Indexed: 10/26/2022]
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