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Islam MA, Akter J, Lee I, Shrestha S, Pandey A, Gyawali N, Hossain MM, Hanif MA, Jang SG, Hahn JR. Facile Preparation of a Bispherical Silver-Carbon Photocatalyst and Its Enhanced Degradation Efficiency of Methylene Blue, Rhodamine B, and Methyl Orange under UV Light. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:3959. [PMID: 36432244 PMCID: PMC9698814 DOI: 10.3390/nano12223959] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/17/2022] [Revised: 11/04/2022] [Accepted: 11/07/2022] [Indexed: 06/16/2023]
Abstract
The combination of organic and inorganic materials is attracting attention as a photocatalyst that promotes the decomposition of organic dyes. A facile thermal procedure has been proposed to produce spherical silver nanoparticles (AgNPs), carbon nanospheres (CNSs), and a bispherical AgNP-CNS nanocomposite. The AgNPs and CNSs were each synthesized from silver acetate and glucose via single- and two-step annealing processes under sealed conditions, respectively. The AgNP-CNS nanocomposite was synthesized by the thermolysis of a mixture of silver acetate and a mesophase, where the mesophase was formed by annealing glucose in a sealed vessel at 190 °C. The physicochemical features of the as-prepared nanoparticles and composite were evaluated using several analytical techniques, revealing (i) increased light absorption, (ii) a reduced bandgap, (iii) the presence of chemical interfacial heterojunctions, (iv) an increased specific surface area, and (v) favorable band-edge positions of the AgNP-CNS nanocomposite compared with those of the individual AgNP and CNS components. These characteristics led to the excellent photocatalytic efficacy of the AgNP-CNS nanocomposite for the decomposition of three pollutant dyes under ultraviolet (UV) radiation. In the AgNP-CNS nanocomposite, the light absorption and UV utilization capacity increased at more active sites. In addition, effective electron-hole separation at the heterojunction between the AgNPs and CNSs was possible under favorable band-edge conditions, resulting in the creation of reactive oxygen species. The decomposition rates of methylene blue were 95.2, 80.2, and 73.2% after 60 min in the presence of the AgNP-CNS nanocomposite, AgNPs, and CNSs, respectively. We also evaluated the photocatalytic degradation efficiency at various pH values and loadings (catalysts and dyes) with the AgNP-CNS nanocomposite. The AgNP-CNS nanocomposite was structurally rigid, resulting in 93.2% degradation of MB after five cycles of photocatalytic degradation.
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Affiliation(s)
- Md. Akherul Islam
- Department of Bioactive Material Sciences, Jeonbuk National University, Jeonju 54896, Korea
| | - Jeasmin Akter
- Department of Chemistry, Research Institute of Physics and Chemistry, Jeonbuk National University, Jeonju 54896, Korea
| | - Insup Lee
- Department of Chemistry, Research Institute of Physics and Chemistry, Jeonbuk National University, Jeonju 54896, Korea
| | - Santu Shrestha
- Department of Chemistry, Research Institute of Physics and Chemistry, Jeonbuk National University, Jeonju 54896, Korea
| | - Anil Pandey
- Department of Chemistry, Research Institute of Physics and Chemistry, Jeonbuk National University, Jeonju 54896, Korea
| | - Narayan Gyawali
- Department of Chemistry, Research Institute of Physics and Chemistry, Jeonbuk National University, Jeonju 54896, Korea
| | - Md. Monir Hossain
- Department of Bioactive Material Sciences, Jeonbuk National University, Jeonju 54896, Korea
- Functional Composite Materials Research Center, Institute of Advanced Composites Materials, Korea Institute of Science and Technology, Wanju, Jeonbuk 55324, Korea
| | - Md. Abu Hanif
- Department of Bioactive Material Sciences, Jeonbuk National University, Jeonju 54896, Korea
| | - Se Gyu Jang
- Functional Composite Materials Research Center, Institute of Advanced Composites Materials, Korea Institute of Science and Technology, Wanju, Jeonbuk 55324, Korea
| | - Jae Ryang Hahn
- Department of Chemistry, Research Institute of Physics and Chemistry, Jeonbuk National University, Jeonju 54896, Korea
- Textile Engineering, Chemistry and Science, North Carolina State University 2401 Research Dr., Raleigh, NC 27695-8301, USA
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Zuarez-Chamba M, Rajendran S, Herrera-Robledo M, Priya AK, Navas-Cárdenas C. Bi-based photocatalysts for bacterial inactivation in water: Inactivation mechanisms, challenges, and strategies to improve the photocatalytic activity. ENVIRONMENTAL RESEARCH 2022; 209:112834. [PMID: 35122745 DOI: 10.1016/j.envres.2022.112834] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/11/2021] [Revised: 01/15/2022] [Accepted: 01/24/2022] [Indexed: 06/14/2023]
Abstract
Bi-based photocatalysts have been considered suitable materials for water disinfection under natural solar light due to their outstanding optical and electronic properties. However, until now, there are not extensive reviews about the development of Bi-based materials and their application in bacterial inactivation in aqueous solutions. For this reason, this work has focused on summarizing the state of the art related to the inactivation of Gram- and Gram + pathogenic bacteria under visible light irradiation using different Bi-based micro and nano structures. In this sense, the photocatalytic bacterial inactivation mechanisms are analyzed, considering several modifications. The factors that can affect the photocatalytic performance of these materials in real conditions and at a large scale (e.g., water characteristics, pH, light intensity, photocatalyst dosage, and bacteria level) have been studied. Furthermore, current alternatives for improving the photocatalytic antibacterial activity and reuse of Bi-based materials (e.g., surface engineering, crystal facet engineering, doping, noble metal coupling, heterojunctions, Z-scheme junctions, coupling with graphene derivatives, magnetic composites, immobilization) have been explored. According to several reports, inactivation rate values higher than 90% can be achieved by using the modified Bi-based micro/nano structures, which become them excellent candidates for photocatalytic water disinfection. However, these innovative photocatalytic materials bring a variety of future difficulties and opportunities in water disinfection.
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Affiliation(s)
| | - Saravanan Rajendran
- Department of Mechanical Engineering, Faculty of Engineering, University of Tarapaca, Avda. General Velásquez, Arica, Chile
| | | | - A K Priya
- Department of Civil Engineering, KPR Institute of Engineering and Technology, Coimbatore, India
| | - Carlos Navas-Cárdenas
- School of Chemical Sciences and Engineering, Universidad Yachay Tech, Urcuquí, Ecuador.
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3
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Bismuth Oxychloride Nanomaterials Fighting for Human Health: From Photodegradation to Biomedical Applications. CRYSTALS 2022. [DOI: 10.3390/cryst12040491] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Environmental pollution and various diseases seriously affect the health of human beings. Photocatalytic nanomaterials (NMs) have been used for degrading pollution for a long time. However, the biomedical applications of photocatalytic NMs have only recently been investigated. As a typical photocatalytic NM, bismuth oxychloride (BiOCl) exhibits excellent photocatalytic performance due to its unique layered structure, electronic properties, optical properties, good photocatalytic activity, and stability. Some environmental pollutants, such as volatile organic compounds, antibiotics and their derivatives, heavy metal ions, pesticides, and microorganisms, could not only be detected but also be degraded by BiOCl-based NMs due to their excellent photocatalytic and photoelectrochemical properties. In particular, BiOCl-based NMs have been used as theranostic platforms because of their CT and photoacoustic imaging abilities, as well as photodynamic and photothermal performances. However, some reviews have only profiled the applications of dye degradation, hydrogen or oxygen production, carbon dioxide reduction, or nitrogen fixation of BiOCl NMs. There is a notable knowledge gap regarding the systematic study of the relationship between BiOCl NMs and human health, especially the biomedical applications of BiOCl-based NMs. As a result, in this review, the recent progress of BiOCl-based photocatalytic degradation and biomedical applications are summarized, and the improvement of BiOCl-based NMs in environmental and healthcare fields are also discussed. Finally, a few insights into the current status and future perspectives of BiOCl-based NMs are given.
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Zarebkohan A, Ghafoori A, Bani F, Rasta SH, Abbasi E, Salehi R, Milani M. Photothermal ablation of pathogenic bacteria by chensinin-1b modified gold nanoparticles. J Drug Deliv Sci Technol 2021. [DOI: 10.1016/j.jddst.2021.102846] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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5
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Liu S, Jiang X, Waterhouse GI, Zhang ZM, Yu LM. Construction of Z-scheme Titanium-MOF/plasmonic silver nanoparticle/NiFe layered double hydroxide photocatalysts with enhanced dye and antibiotic degradation activity under visible light. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2021.119525] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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Yao J, Peng S, Xie L, Ye G, Zhu C. BiOCl/α-Fe2O3 composite for enhanced photocatalytic degradation of gaseous styrene. Chem Phys 2021. [DOI: 10.1016/j.chemphys.2021.111229] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Yang X, Chen Z, Zhao W, Liu C, Qian X, Zhang M, Wei G, Khan E, Hau Ng Y, Sik Ok Y. Recent advances in photodegradation of antibiotic residues in water. CHEMICAL ENGINEERING JOURNAL (LAUSANNE, SWITZERLAND : 1996) 2021; 405:126806. [PMID: 32904764 PMCID: PMC7457966 DOI: 10.1016/j.cej.2020.126806] [Citation(s) in RCA: 112] [Impact Index Per Article: 37.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2020] [Revised: 08/11/2020] [Accepted: 08/24/2020] [Indexed: 05/21/2023]
Abstract
Antibiotics are widely present in the environment due to their extensive and long-term use in modern medicine. The presence and dispersal of these compounds in the environment lead to the dissemination of antibiotic residues, thereby seriously threatening human and ecosystem health. Thus, the effective management of antibiotic residues in water and the practical applications of the management methods are long-term matters of contention among academics. Particularly, photocatalysis has attracted extensive interest as it enables the treatment of antibiotic residues in an eco-friendly manner. Considerable progress has been achieved in the implementation of photocatalytic treatment of antibiotic residues in the past few years. Therefore, this review provides a comprehensive overview of the recent developments on this important topic. This review primarily focuses on the application of photocatalysis as a promising solution for the efficient decomposition of antibiotic residues in water. Particular emphasis was laid on improvement and modification strategies, such as augmented light harvesting, improved charge separation, and strengthened interface interaction, all of which enable the design of powerful photocatalysts to enhance the photocatalytic removal of antibiotics.
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Affiliation(s)
- Xiuru Yang
- College of Materials and Chemistry, China Jiliang University, 258 Xueyuan Street, Xiasha Higher Education Zone Hangzhou, 310018, China
| | - Zhi Chen
- College of Materials and Chemistry, China Jiliang University, 258 Xueyuan Street, Xiasha Higher Education Zone Hangzhou, 310018, China
| | - Wan Zhao
- College of Materials and Chemistry, China Jiliang University, 258 Xueyuan Street, Xiasha Higher Education Zone Hangzhou, 310018, China
| | - Chunxi Liu
- College of Materials and Chemistry, China Jiliang University, 258 Xueyuan Street, Xiasha Higher Education Zone Hangzhou, 310018, China
| | - Xiaoxiao Qian
- College of Materials and Chemistry, China Jiliang University, 258 Xueyuan Street, Xiasha Higher Education Zone Hangzhou, 310018, China
| | - Ming Zhang
- Department of Environmental Engineering, China Jiliang University, 258 Xueyuan Street, Xiasha Higher Education Zone Hangzhou, 310018, China
| | - Guoying Wei
- College of Materials and Chemistry, China Jiliang University, 258 Xueyuan Street, Xiasha Higher Education Zone Hangzhou, 310018, China
| | - Eakalak Khan
- Department of Civil and Environmental Engineering and Construction, University of Nevada, Las Vegas, NV 89154, USA
| | - Yun Hau Ng
- School of Energy and Environment, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong Special Administrative Region, China
| | - Yong Sik Ok
- Korea Biochar Research Center, APRU Sustainable Waste Management & Division of Environmental Science and Ecological Engineering, Korea University, Seoul, South Korea
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Affiliation(s)
- Rimzhim Gupta
- Department of Chemical EngineeringIndian Institute of Science Bangalore, Karnataka 560012 India
| | - Jayant Modak
- Department of Chemical EngineeringIndian Institute of Science Bangalore, Karnataka 560012 India
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Feng H, Yang F, Dong J, Liu Q. Ag@BiOCl super-hydrophobic nanostructure for enhancing SERS detection sensitivity. RSC Adv 2020; 10:11865-11870. [PMID: 35496623 PMCID: PMC9050507 DOI: 10.1039/d0ra01226b] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2020] [Accepted: 03/16/2020] [Indexed: 12/17/2022] Open
Abstract
Surface-enhanced Raman scattering (SERS) has received widespread attention in the rapid detection of trace substances. The super-hydrophobic surface of structures has a significant impact on improving SERS performance. Usually a low concentration of objective molecules is randomly distributed in a large area on a non-hydrophobic SERS substrate, resulting in the Raman signals of the molecules not being easily detected. As a solution, a super-hydrophobic surface can gather a large number of probe molecules around the plasmon hot spots to effectively improve Raman SERS detection sensitivity. In this work, a chloride super-hydrophobic surface is fabricated, for the first time, by a simple and low-cost method of combining surface hydrophobic structures with surface modification. The dispersed and uniform hierarchical Ag@BiOCl nanosheet (Ag@BiOCl NSs) substrate has a higher surface-to-volume ratio and rich nano-gap. Such a chip with a high static contact angle of 157.4° exhibits a Raman signal detection limit of R6G dyes up to 10−9 M and an enhancement factor up to 107. This SERS chip with a super-hydrophobic surface offers great potential in practical applications owing to its simple fabricating process, low cost, large area, and high sensitivity. This large-area hierarchical Ag@BiOCl NSs SERS chip with a super-hydrophobic surface offers a great advantage in further enhancing SERS detection sensitivity.![]()
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Affiliation(s)
- Huimin Feng
- Chinese Academy of Sciences (CAS) Key Laboratory of Nanosystem and Hierarchical Fabrication
- CAS Center for Excellence in Nanoscience
- National Center for Nanoscience and Technology
- Beijing 100190
- P. R. China
| | - Fengyou Yang
- Chinese Academy of Sciences (CAS) Key Laboratory of Nanosystem and Hierarchical Fabrication
- CAS Center for Excellence in Nanoscience
- National Center for Nanoscience and Technology
- Beijing 100190
- P. R. China
| | - Jianjie Dong
- Chinese Academy of Sciences (CAS) Key Laboratory of Nanosystem and Hierarchical Fabrication
- CAS Center for Excellence in Nanoscience
- National Center for Nanoscience and Technology
- Beijing 100190
- P. R. China
| | - Qian Liu
- Chinese Academy of Sciences (CAS) Key Laboratory of Nanosystem and Hierarchical Fabrication
- CAS Center for Excellence in Nanoscience
- National Center for Nanoscience and Technology
- Beijing 100190
- P. R. China
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One-Pot Synthesized Visible Light-Driven BiOCl/AgCl/BiVO 4 n-p Heterojunction for Photocatalytic Degradation of Pharmaceutical Pollutants. MATERIALS 2019; 12:ma12142297. [PMID: 31323776 PMCID: PMC6679066 DOI: 10.3390/ma12142297] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/30/2019] [Revised: 07/15/2019] [Accepted: 07/15/2019] [Indexed: 11/17/2022]
Abstract
A novel enhanced visible light absorption BiOCl/AgCl/BiVO4 heterojunction of photocatalysts could be obtained through a one-pot hydrothermal method used with two different pH solutions. There was a relationship between synthesis pH and the ratio of BiOCl to BiVO4 in XRD planes and their photocatalytic activity. The visible light photocatalytic performances of photocatalysts were evaluated via degradation of diclofenac (DCFF) as a pharmaceutical model pollutant. Furthermore, kinetic studies showed that DCF degradation followed pseudo-first-order kinetics. The photocatalytic degradation rates of BiOCl/AgCl/BiVO4 synthesized at pH = 1.2 and pH = 4 for DCF were 72% and 47%, respectively, showing the higher activity of the photocatalyst which was synthesized at a lower pH value. It was concluded that the excellent photocatalytic activity of BiOCl/AgCl/BiVO4 is due to the enhanced visible light absorption formation of a heterostructure, which increased the lifetime of photo-produced electron–hole pairs by creating a heterojunction. The influence of pH during synthesis on photocatalytic activity in order to create different phases was investigated. This work suggests that the BiOCl/AgCl/BiVO4 p-n heterojunction is more active when the ratio of BiOCl to BiVO4 is smaller, and this could be achieved simply by the pH adjustment. This is a promising method of modifying the photocatalyst for the purpose of pollutant degradation under visible light illumination.
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Yougbare S, Chang TK, Tan SH, Kuo JC, Hsu PH, Su CY, Kuo TR. Antimicrobial Gold Nanoclusters: Recent Developments and Future Perspectives. Int J Mol Sci 2019; 20:E2924. [PMID: 31208013 PMCID: PMC6627976 DOI: 10.3390/ijms20122924] [Citation(s) in RCA: 78] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2019] [Revised: 06/09/2019] [Accepted: 06/12/2019] [Indexed: 12/01/2022] Open
Abstract
Bacterial infections have caused serious threats to public health due to the antimicrobial resistance in bacteria. Recently, gold nanoclusters (AuNCs) have been extensively investigated for biomedical applications because of their superior structural and optical properties. Great efforts have demonstrated that AuNCs conjugated with various surface ligands are promising antimicrobial agents owing to their high biocompatibility, polyvalent effect, easy modification and photothermal stability. In this review, we have highlighted the recent achievements for the utilizations of AuNCs as the antimicrobial agents. We have classified the antimicrobial AuNCs by their surface ligands including small molecules (< 900 Daltons) and macromolecules (> 900 Daltons). Moreover, the antimicrobial activities and mechanisms of AuNCs have been introduced into two main categories of small molecules and macromolecules, respectively. In accordance with the advancements of antimicrobial AuNCs, we further provided conclusions of current challenges and recommendations of future perspectives of antimicrobial AuNCs for fundamental researches and clinical applications.
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Affiliation(s)
- Sibidou Yougbare
- International Ph.D. Program in Biomedical Engineering, College of Biomedical Engineering, Taipei Medical University, Taipei 11031, Taiwan.
| | - Ting-Kuang Chang
- School of Biomedical Engineering, College of Biomedical Engineering, Taipei Medical University, Taipei 11031, Taiwan.
| | - Shih-Hua Tan
- School of Biomedical Engineering, College of Biomedical Engineering, Taipei Medical University, Taipei 11031, Taiwan.
| | - Jui-Chi Kuo
- School of Biomedical Engineering, College of Biomedical Engineering, Taipei Medical University, Taipei 11031, Taiwan.
| | - Po-Hsuan Hsu
- School of Biomedical Engineering, College of Biomedical Engineering, Taipei Medical University, Taipei 11031, Taiwan.
| | - Chen-Yen Su
- School of Biomedical Engineering, College of Biomedical Engineering, Taipei Medical University, Taipei 11031, Taiwan.
| | - Tsung-Rong Kuo
- International Ph.D. Program in Biomedical Engineering, College of Biomedical Engineering, Taipei Medical University, Taipei 11031, Taiwan.
- Graduate Institute of Nanomedicine and Medical Engineering, College of Biomedical Engineering, Taipei Medical University, Taipei 11031, Taiwan.
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12
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Miao H, Teng Z, Wang C, Chong H, Wang G. Recent Progress in Two-Dimensional Antimicrobial Nanomaterials. Chemistry 2018; 25:929-944. [DOI: 10.1002/chem.201801983] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2018] [Revised: 07/10/2018] [Indexed: 12/14/2022]
Affiliation(s)
- Hui Miao
- College of Chemistry and Chemical Engineering, Jiangsu Key Laboratory of Environmental Engineering and Monitoring; Yangzhou University; 180 Si-Wang-Ting Road Yangzhou 225002 P.R. China
| | - Zhenyuan Teng
- College of Chemistry and Chemical Engineering, Jiangsu Key Laboratory of Environmental Engineering and Monitoring; Yangzhou University; 180 Si-Wang-Ting Road Yangzhou 225002 P.R. China
| | - Chengyin Wang
- College of Chemistry and Chemical Engineering, Jiangsu Key Laboratory of Environmental Engineering and Monitoring; Yangzhou University; 180 Si-Wang-Ting Road Yangzhou 225002 P.R. China
| | - Hui Chong
- College of Chemistry and Chemical Engineering, Jiangsu Key Laboratory of Environmental Engineering and Monitoring; Yangzhou University; 180 Si-Wang-Ting Road Yangzhou 225002 P.R. China
| | - Guoxiu Wang
- College of Chemistry and Chemical Engineering, Jiangsu Key Laboratory of Environmental Engineering and Monitoring; Yangzhou University; 180 Si-Wang-Ting Road Yangzhou 225002 P.R. China
- School of Mathematical and Physical Sciences; University of Technology, Sydney, City campus; Broadway Sydney NSW 2007 Australia
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13
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Zhou S, Zhang Q, Zhao D, Zong W, Fan Z, Sun Y, Xu X. Synthesis, properties and mechanism of photodegradation of core-shell structured upconversion luminescent NaYF4
:Yb3+
,Er3+
@BiOCl. Appl Organomet Chem 2018. [DOI: 10.1002/aoc.4230] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Shiyu Zhou
- Key Laboratory of Three Gorges Reservoir Region's Eco-Environment, Ministry of Education; Chongqing University; Chongqing 400045 China
- National Centre for International Research of Low-Carbon and Green Buildings; Chongqing University; Chongqing 400045 China
| | - Qiyan Zhang
- Key Laboratory of Three Gorges Reservoir Region's Eco-Environment, Ministry of Education; Chongqing University; Chongqing 400045 China
- National Centre for International Research of Low-Carbon and Green Buildings; Chongqing University; Chongqing 400045 China
| | - Deqiang Zhao
- Key Laboratory of Three Gorges Reservoir Region's Eco-Environment, Ministry of Education; Chongqing University; Chongqing 400045 China
- National Centre for International Research of Low-Carbon and Green Buildings; Chongqing University; Chongqing 400045 China
| | - Wenjuan Zong
- Key Laboratory of Three Gorges Reservoir Region's Eco-Environment, Ministry of Education; Chongqing University; Chongqing 400045 China
- National Centre for International Research of Low-Carbon and Green Buildings; Chongqing University; Chongqing 400045 China
| | - Zihong Fan
- School of Environmental and Biological Engineering; Chongqing Technology and Business University; Chongqing 400067 China
| | - Yaofang Sun
- Key Laboratory of Three Gorges Reservoir Region's Eco-Environment, Ministry of Education; Chongqing University; Chongqing 400045 China
- National Centre for International Research of Low-Carbon and Green Buildings; Chongqing University; Chongqing 400045 China
| | - Xuan Xu
- Key Laboratory of Three Gorges Reservoir Region's Eco-Environment, Ministry of Education; Chongqing University; Chongqing 400045 China
- National Centre for International Research of Low-Carbon and Green Buildings; Chongqing University; Chongqing 400045 China
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Choudhari S, Habimana O, Hannon J, Allen A, Cummins E, Casey E. Dynamics of silver elution from functionalised antimicrobial nanofiltration membranes. BIOFOULING 2017; 33:520-529. [PMID: 28604168 DOI: 10.1080/08927014.2017.1331436] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/28/2017] [Accepted: 05/12/2017] [Indexed: 06/07/2023]
Abstract
In an effort to mitigate biofouling on thin film composite membranes such as nanofiltration and reverse osmosis, a myriad of different surface modification strategies has been published. The use of silver nanoparticles (Ag-NPs) has emerged as being particularly promising. Nevertheless, the stability of these surface modifications is still poorly understood, particularly under permeate flux conditions. Leaching or elution of Ag-NPs from the membrane surface can not only affect the antimicrobial characteristics of the membrane, but could also potentially present an environmental liability when applied in industrial-scale systems. This study sought to investigate the dynamics of silver elution and the bactericidal effect of an Ag-NP functionalised NF270 membrane. Inductively coupled plasma-atomic emission spectroscopy was used to show that the bulk of leached silver occurred at the start of experimental runs, and was found to be independent of salt or permeate conditions used. Cumulative amounts of leached silver did, however, stabilise following the initial release, and were shown to have maintained the biocidal characteristics of the modified membrane, as observed by a higher fraction of structurally damaged Pseudomonas fluorescens cells. These results highlight the need to comprehensively assess the time-dependent nature of bactericidal membranes.
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Affiliation(s)
- S Choudhari
- a School of Chemical and Bioprocess Engineering , University College Dublin (UCD) , Dublin , Ireland
- b Department of Biological Sciences , Dayananda Sagar University , Bangalore , India
| | - O Habimana
- c School of Biological Sciences , The University of Hong Kong , Hong Kong , PR China
| | - J Hannon
- d School of Biosystems and Food Engineering, Agricultural and Food Science Centre , University College Dublin (UCD) , Dublin , Ireland
| | - A Allen
- a School of Chemical and Bioprocess Engineering , University College Dublin (UCD) , Dublin , Ireland
| | - E Cummins
- d School of Biosystems and Food Engineering, Agricultural and Food Science Centre , University College Dublin (UCD) , Dublin , Ireland
| | - E Casey
- a School of Chemical and Bioprocess Engineering , University College Dublin (UCD) , Dublin , Ireland
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