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Guo J, Fan Y, Qiao C, Ma X, Dong X, Zeng H. Harnessing coal and coal waste for environmental conservation: A review of photocatalytic materials. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 946:174437. [PMID: 38960199 DOI: 10.1016/j.scitotenv.2024.174437] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2024] [Revised: 06/29/2024] [Accepted: 06/30/2024] [Indexed: 07/05/2024]
Abstract
Fossil fuels, especially coal, have played a pivotal role in driving technological and economic advancements over the past century, though accompanied by numerous environmental challenges. Rapid progress in green and sustainable energy sources, including tidal, wind, and solar energy, coupled with growing environmental concerns, the conventional coal industry is experiencing a sustained decline in both size and financial viability. This situation necessitates the urgent adoption of advanced approaches to coal utilization. Beyond serving as an energy source, coal and its by-products, known as coal waste, can serve as valuable resources for the development of advanced materials, including photocatalysts. The advancement of photocatalytic materials derived from coal and coal waste can capitalize on these natural carbon and mineral sources, providing a viable solution to numerous environmental challenges. Currently, research in this domain remains in its early stages, with existing studies primarily focusing on specific types of photocatalysts or particular aspects of the fabrication process. Therefore, available coal-based and coal waste-based photocatalytic materials were systematically examined and categorized into six types according to their composition and dimensional/structural characteristics. Each type of photocatalytic material was introduced, along with common fabrication and characterization technologies. Representative works were discussed in detail to highlight the unique features of different types of coal-based and coal waste-based photocatalytic materials. Furthermore, the promising applications of these materials in environmental protection and pollution treatment were summarized, while also addressing the challenges and prospects in this research field. This review comprehensively overviews the fundamental knowledge and recent advancements in photocatalytic materials derived from coal and coal waste, with the goal of catalyzing the development of next generation photocatalysts and contributing to the transformation of the conventional coal industry.
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Affiliation(s)
- Jiaqi Guo
- College of Mining Engineering, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China; Department of Chemical and Materials Engineering, University of Alberta, Edmonton, AB T6G 1H9, Canada
| | - Yuping Fan
- College of Mining Engineering, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China
| | - Chenyu Qiao
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, AB T6G 1H9, Canada
| | - Xiaomin Ma
- College of Mining Engineering, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China
| | - Xianshu Dong
- College of Mining Engineering, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China.
| | - Hongbo Zeng
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, AB T6G 1H9, Canada.
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Daub NA, Aziz F, Mhamad SA, Chee DNA, Jaafar J, Yusof N, Salleh WNW, Ismail AF. Harnessing the photocatalytic potential of bismuth ferrite-activated carbon nanocomposite (BFO-AC) for Staphylococcus aureus decontamination under visible light. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:16629-16641. [PMID: 38321283 DOI: 10.1007/s11356-024-32261-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2023] [Accepted: 01/25/2024] [Indexed: 02/08/2024]
Abstract
In response to the escalating global issue of microbial contamination, this study introduces a breakthrough photocatalyst: bismuth ferrite-activated carbon (BFO-AC) for visible light-driven disinfection, specifically targeting the Gram-positive bacterium Staphylococcus aureus (S. aureus). Employing an ultrasonication method, we synthesized various BFO-AC ratios and subjected them to comprehensive characterization. Remarkably, the bismuth ferrite-activated carbon 1:1.5 ratio (BA 1:1.5) nanocomposite exhibited the narrowest band gap of 1.86 eV. Notably, BA (1:1.5) demonstrated an exceptional BET surface area of 862.99 m2/g, a remarkable improvement compared to pristine BFO with only 27.61 m2/g. Further investigation through FE-SEM unveiled the presence of BFO nanoparticles on the activated carbon surface. Crucially, the photocatalytic efficacy of BA (1:1.5) towards S. aureus reached its zenith, achieving complete inactivation in just 60 min. TEM analysis revealed severe damage and rupture of bacterial cells, affirming the potent disinfection capabilities of BA (1:1.5). This exceptional disinfection efficiency underscores the promising potential of BA (1:1.5) for the treatment of contaminated water sources. Importantly, our results underscore the enhanced photocatalytic performance with an increased content of activated carbon, suggesting a promising avenue for more effective microorganism inactivation.
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Affiliation(s)
- Nur Atiqah Daub
- Advanced Membrane Technology Research Centre (AMTEC), Faculty of Chemical and Energy Engineering, Universiti Teknologi Malaysia, 81310, Johor Bahru, Johor, Malaysia
| | - Farhana Aziz
- Advanced Membrane Technology Research Centre (AMTEC), Faculty of Chemical and Energy Engineering, Universiti Teknologi Malaysia, 81310, Johor Bahru, Johor, Malaysia.
| | - Shakhawan Ahmad Mhamad
- Chemistry Department, College of Education, University of Sulaimany, 46001, Sulaimani, Kurdistan, Iraq
| | - Dayang Norafizan Awang Chee
- Faculty Resource Science and Technology, Universiti Malaysia Sarawak, 94300, Kota Samarahan, Sarawak, Malaysia
| | - Juhana Jaafar
- Advanced Membrane Technology Research Centre (AMTEC), Faculty of Chemical and Energy Engineering, Universiti Teknologi Malaysia, 81310, Johor Bahru, Johor, Malaysia
| | - Norhaniza Yusof
- Advanced Membrane Technology Research Centre (AMTEC), Faculty of Chemical and Energy Engineering, Universiti Teknologi Malaysia, 81310, Johor Bahru, Johor, Malaysia
| | - Wan Norharyati Wan Salleh
- Advanced Membrane Technology Research Centre (AMTEC), Faculty of Chemical and Energy Engineering, Universiti Teknologi Malaysia, 81310, Johor Bahru, Johor, Malaysia
| | - Ahmad Fauzi Ismail
- Advanced Membrane Technology Research Centre (AMTEC), Faculty of Chemical and Energy Engineering, Universiti Teknologi Malaysia, 81310, Johor Bahru, Johor, Malaysia
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Martín-Sómer M, Pablos C, Adán C, van Grieken R, Marugán J. A review on led technology in water photodisinfection. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 885:163963. [PMID: 37149196 DOI: 10.1016/j.scitotenv.2023.163963] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/22/2023] [Revised: 04/19/2023] [Accepted: 05/01/2023] [Indexed: 05/08/2023]
Abstract
The increase in efficiency achieved by UV LED devices has led to a compelling increase in research reports on UV LED water treatment for consumption in the past few years. This paper presents an in-depth review based on recent studies on the suitability and performance of UV LED-driven processes for water disinfection. The effect of different UV wavelengths and their combinations was analysed for the inactivation of various microorganisms and the inhibition of repair mechanisms. Whereas 265 nm UVC LED present a higher DNA damaging potential, 280 nm radiation is reported to repress photoreactivation and dark repair. No synergistic effects have been proved to exist when coupling UVB + UVC whereas sequential UVA-UVC radiation seemed to enhance inactivation. Benefits of pulsed over continuous radiation in terms of germicidal effects and energy consumption were also analysed, but with inconclusive results. However, pulsed radiation may be promising for improving thermal management. As a challenge, the use of UV LED sources introduces significant inhomogeneities in the light distribution, pushing for the development of adequate simulation methods to ensure that the minimum target dose required for the target microbes is achieved. Concerning energy consumption, selecting the optimal wavelength of the UV LED needs a compromise between the quantum efficiency of the process and the electricity-to-photon conversion. The expected development of the UV LED industry in the next few years points to UVC LED as a promising technology for water disinfection at a large scale that could be competitive in the market in the near future.
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Affiliation(s)
- Miguel Martín-Sómer
- Department of Chemical and Environmental Technology, ESCET, Universidad Rey Juan Carlos, C/ Tulipán s/n, 28933 Móstoles, Madrid, Spain
| | - Cristina Pablos
- Department of Chemical and Environmental Technology, ESCET, Universidad Rey Juan Carlos, C/ Tulipán s/n, 28933 Móstoles, Madrid, Spain
| | - Cristina Adán
- Department of Chemical and Environmental Technology, ESCET, Universidad Rey Juan Carlos, C/ Tulipán s/n, 28933 Móstoles, Madrid, Spain
| | - Rafael van Grieken
- Department of Chemical and Environmental Technology, ESCET, Universidad Rey Juan Carlos, C/ Tulipán s/n, 28933 Móstoles, Madrid, Spain
| | - Javier Marugán
- Department of Chemical and Environmental Technology, ESCET, Universidad Rey Juan Carlos, C/ Tulipán s/n, 28933 Móstoles, Madrid, Spain.
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Jiang G, Zhu B, Sun J, Liu F, Wang Y, Zhao C. Enhanced activity of ZnS (111) by N/Cu co-doping: Accelerated degradation of organic pollutants under visible light. J Environ Sci (China) 2023; 125:244-257. [PMID: 36375910 DOI: 10.1016/j.jes.2021.12.023] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2021] [Revised: 12/02/2021] [Accepted: 12/22/2021] [Indexed: 06/16/2023]
Abstract
High-efficiency photocatalysts are of great significance for the application of photocatalytic technology in water treatment. In this study, N/Cu co-doped ZnS nanosphere photocatalyst (N/Cu-ZnS) is synthesized by a hydrothermal method for the first time. After doping, the texture of nanosphere becomes loose, the nanometer diameter is reduced, making the specific surface area of catalyst increased from 34.73 to 101.59 m2/g. The characterization results show that more ZnS (111) crystal planes are exposed by N/Cu co-doping; the calculations of density functional theory show that N/Cu co-doping can increase the catalytic activity of the ZnS (111) crystal plane, enhance the adsorption capacity of (111) crystal plane to O2, and promote the generation of •O2-. The energy levels of the introduced impurities can be hybridized with the energy levels of S and Zn at the top of valence band and the bottom of conduction band, which makes the band gap narrower, thus enhancing the absorption of visible light. Compared with pure ZnS, the degradation rates of 2,4-dichlorophenol (2,4-DCP) and tetracycline (TC) by N/Cu-ZnS under visible light (>420 nm) are increased by 83.7 and 51 times, respectively. In this research, a promising photocatalyst for photocatalytic degradation of organic pollutants in wastewater is provided.
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Affiliation(s)
- Guofei Jiang
- College of Chemical Engineering, China University of Petroleum, Qingdao 266580, China
| | - Benjie Zhu
- College of Chemical Engineering, China University of Petroleum, Qingdao 266580, China
| | - Junzhi Sun
- College of Chemical Engineering, China University of Petroleum, Qingdao 266580, China
| | - Fang Liu
- College of Chemical Engineering, China University of Petroleum, Qingdao 266580, China; State Key Laboratory of Petroleum Pollution Control, Beijing 102206, China; State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Qingdao 266580, China.
| | - Yongqiang Wang
- College of Chemical Engineering, China University of Petroleum, Qingdao 266580, China; State Key Laboratory of Petroleum Pollution Control, Beijing 102206, China; State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Qingdao 266580, China
| | - Chaocheng Zhao
- College of Chemical Engineering, China University of Petroleum, Qingdao 266580, China; State Key Laboratory of Petroleum Pollution Control, Beijing 102206, China; State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Qingdao 266580, China
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Eskikaya O, Gun M, Bouchareb R, Bilici Z, Dizge N, Ramaraj R, Balakrishnan D. Photocatalytic activity of calcined chicken eggshells for Safranin and Reactive Red 180 decolorization. CHEMOSPHERE 2022; 304:135210. [PMID: 35679982 DOI: 10.1016/j.chemosphere.2022.135210] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2022] [Revised: 05/08/2022] [Accepted: 05/31/2022] [Indexed: 06/15/2023]
Abstract
One of the most important problems affecting the environment today is the inability to adequately treat wastewater containing dyes. Among of the many treatment processes used in the treatment of dye-containing wastewater, photocatalytic based wastewater treatment processes attract the attention of scientists as a new, economically feasible, and promising approach which has been in practice for a few decades. However, in order to use these processes in wider areas, cheap and effective catalysts are still being developed today. In this study, the photocatalytic activity of eggshell-CaO produced from waste chicken eggshells was investigated for decolorization of Safranin (Basic Red 2) and Reactive Red 180 (RR180) dyes. First, sintering process was applied to the waste chicken eggshells at different temperatures (300, 600, 900 °C) in order to observe CaO formation from the eggshells. Second, the parameters such as photocatalyst amount, pH, concentration of dyes, and reaction time were optimized on dye removal efficiency in photocatalytic experiments. The optimum conditions were performed under visible light and found to be 1 g/L of catalyst amount (sintered at 900 °C), original solution pH (6.80 for Safranin and 6.60 for RR180), and 5 mg/L of dye concentration. The photocatalytic removal efficiencies of Safranin and RR180 dyes were 100% and 97.90%, respectively, under the determined optimum experimental conditions. The adsorption efficiency of the dyes that could be realized during the photocatalytic experiment was measured as 20.99% and 9.99% for Safranin and RR180 dyes, respectively.
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Affiliation(s)
- Ozan Eskikaya
- Department of Energy Systems Engineering, Faculty of Technology, Tarsus University, Tarsus, 33400, Turkey
| | - Melis Gun
- Department of Environmental Engineering, Mersin University, Mersin, 33343, Turkey
| | - Raouf Bouchareb
- Department of Environmental Engineering, Saleh Boubnider University, Constantine, 25000, Algeria
| | - Zeynep Bilici
- Department of Environmental Engineering, Mersin University, Mersin, 33343, Turkey
| | - Nadir Dizge
- Department of Environmental Engineering, Mersin University, Mersin, 33343, Turkey
| | | | - Deepanraj Balakrishnan
- College of Engineering, Prince Mohammad Bin Fahd University, Al Khobar, 31952, Saudi Arabia.
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Sathishkumar K, Sowmiya K, Arul Pragasan L, Rajagopal R, Sathya R, Ragupathy S, Krishnakumar M, Minnam Reddy VR. Enhanced photocatalytic degradation of organic pollutants by Ag-TiO 2 loaded cassava stem activated carbon under sunlight irradiation. CHEMOSPHERE 2022; 302:134844. [PMID: 35525454 DOI: 10.1016/j.chemosphere.2022.134844] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Revised: 04/24/2022] [Accepted: 05/01/2022] [Indexed: 06/14/2023]
Abstract
Ag-doped TiO2 and Ag-doped TiO2 loaded cassava stem activated carbon (Ag: TiO2/CSAC) were prepared by sol-gel method and are labelled as AT and AT/CSAC respectively. XRD results confirmed that the anatase-TiO2 and crystalline size are decreased (12.37 nm) through the silver doping and cassava stem activated carbon loading. UV-Vis showed that the AT/CSAC makes a red shift from the absorption edge compared to pure and AT samples and then the band gap is reduced (2.81 eV). The increased surface area (238.51 m2/g) of the AT/CSAC sample through the Ag and CSAC, respectively. The consequences point out that the highest photodegradation efficiency (98.08%) of the TiO2 upon silver doping and cassava stem activated carbon loading samples were brilliant green (BG) under sunlight irradiation.
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Affiliation(s)
- K Sathishkumar
- Department of Physics, Annai College of Arts and Science (Affiliated to Bharathidasan University, Trichy), Kovilacheri, Kumbakonam, 612503, Tamil Nadu, India
| | - K Sowmiya
- Department of Agricultural Microbiology, GKVK, University of Agricultural Sciences, Bangalore, 560065, India
| | - L Arul Pragasan
- Department of Environmental Sciences, Bharathiar University, Coimbatore, 641 046, India
| | - Rajakrishnan Rajagopal
- Department of Botany and Microbiology, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - Rengasamy Sathya
- Department of Microbiology, Centre for Research and Development, PRIST University, Tamil Nadu, 613 403, India
| | - S Ragupathy
- Department of Physics, E.R.K. Arts and Science College, Erumiyampatti, Dharmapuri, 636 905, Tamil Nadu, India.
| | - M Krishnakumar
- Department of Physics, University College of Engineering, Dindigul, 624 622, Tamil Nadu, India
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7
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Malunga SM, Chaukura N, Mbiriri CI, Gwenzi W, Moyo M, Kuvarega AT. The Visible light photodegradation of methyl orange and Escherichia coli O157:H7 in wastewater. S AFR J SCI 2022. [DOI: 10.17159/sajs.2022/10938] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
Water pollution due to dyes and pathogens is problematic worldwide, and the disease burden is higher in low-income countries where water treatment facilities are usually inadequate. Thus the development of low-cost techniques for the removal of dyes and pathogens in aquatic systems is critical for safeguarding human and ecological health. In this work, we report the fabrication and use of a photocatalyst derived from waste from coal combustion in removing dyes and pathogens from wastewater. Higher TiO2 loading of the photocatalyst increased the removal efficiency for methyl orange (95.5%), and fluorine-doping improved the disinfection efficacy from 76% to 95% relative to unmodified material. Overall, the work effectively converted hazardous waste into a value-added product that has potential in point-of-use water treatment. Future research should focus on upscaling the technique, investigating the fate of the potential of the photocatalysts for multiple reuse, and the recovery of TiO2 in treated water.
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Affiliation(s)
- Sibongile M. Malunga
- Chemistry Department, Bindura University of Science Education, Bindura, Zimbabwe
| | - Nhamo Chaukura
- Department of Physical and Earth Sciences, Sol Plaatje University, Kimberley, South Africa
| | - Chiedza I. Mbiriri
- Department of Biological Sciences, Bindura University of Science Education, Bindura, Zimbabwe
| | - Willis Gwenzi
- Biosystems and Environmental Engineering Research Group, Department of Soil Science and Agricultural Engineering, University of Zimbabwe, Harare, Zimbabwe
| | - Mambo Moyo
- Department of Chemical Technology, Midlands State University, Gweru, Zimbabwe
| | - Alex T. Kuvarega
- Nanotechnology and Water Sustainability Research Unit, College of Engineering, Science and Technology, University of South Africa, Johannesburg, South Africa
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Fan W, Cui J, Li Q, Huo Y, Xiao D, Yang X, Yu H, Wang C, Jarvis P, Lyu T, Huo M. Bactericidal efficiency and photochemical mechanisms of micro/nano bubble-enhanced visible light photocatalytic water disinfection. WATER RESEARCH 2021; 203:117531. [PMID: 34388494 DOI: 10.1016/j.watres.2021.117531] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/22/2021] [Revised: 07/28/2021] [Accepted: 08/03/2021] [Indexed: 06/13/2023]
Abstract
Microbial contamination of water in the form of highly-resistant bacterial spores can cause a long-term risk of waterborne disease. Advanced photocatalysis has become an effective approach to inactivate bacterial spores due to its potential for efficient solar energy conversion alongside reduced formation of disinfection by-products. However, the overall efficiency of the process still requires significant improvements. Here, we proposed and evaluated a novel visible light photocatalytic water disinfection technology by its close coupling with micro/nano bubbles (MNBs). The inactivation rate constant of Bacillus subtilis spores reached 1.28 h-1, which was 5.6 times higher than that observed for treatment without MNBs. The superior performance for the progressive destruction of spores' cells during the treatment was confirmed by transmission electron microscopy (TEM) and excitation-emission matrix (EEM) spectra determination. Experiments using scavengers of reactive oxygen species (ROSs) revealed that H2O2 and •OH were the primary active species responsible for the inactivation of spores. The effective supply of oxygen from air MNBs helped accelerate the hole oxidation of H2O2 on the photocatalyst (i.e. Ag/TiO2). In addition, the interfacial photoelectric effect from the MNBs was also confirmed to contribute to the spore inactivation. Specifically, MNBs induced strong light scattering, consequently increasing the optical path length in the photocatalysis medium by 54.8% at 700nm and enhancing light adsorption of the photocatalyst. The non-uniformities in dielectricity led to a high-degree of heterogeneity of the electric field, which triggered the formation of a region of enhanced light intensity which ultimately promoted the photocatalytic reaction. Overall, this study provided new insights on the mechanisms of photocatalysis coupled with MNB technology for advanced water treatment.
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Affiliation(s)
- Wei Fan
- School of Environment, Northeast Normal University, 2555 Jingyue Street, Changchun 130117, China
| | - Jingyu Cui
- School of Environment, Northeast Normal University, 2555 Jingyue Street, Changchun 130117, China
| | - Qi Li
- School of Environment, Northeast Normal University, 2555 Jingyue Street, Changchun 130117, China
| | - Yang Huo
- National Demonstration Center for Experimental Physics Education, Northeast Normal University, Changchun 130024, China
| | - Dan Xiao
- Jilin Academy of Agricultural Science, 1363 Shengtai Street, Changchun 130033, China
| | - Xia Yang
- School of Environment, Northeast Normal University, 2555 Jingyue Street, Changchun 130117, China
| | - Hongbin Yu
- School of Environment, Northeast Normal University, 2555 Jingyue Street, Changchun 130117, China
| | - Chunliang Wang
- National Demonstration Center for Experimental Physics Education, Northeast Normal University, Changchun 130024, China.
| | - Peter Jarvis
- Cranfield Water Science Institute, Cranfield University, College Road, Cranfield, Bedfordshire MK43 0AL, United Kingdom
| | - Tao Lyu
- Cranfield Water Science Institute, Cranfield University, College Road, Cranfield, Bedfordshire MK43 0AL, United Kingdom.
| | - Mingxin Huo
- School of Environment, Northeast Normal University, 2555 Jingyue Street, Changchun 130117, China
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Son BT, Long NV, Nhat Hang NT. Fly ash-, foundry sand-, clay-, and pumice-based metal oxide nanocomposites as green photocatalysts. RSC Adv 2021; 11:30805-30826. [PMID: 35498918 PMCID: PMC9041310 DOI: 10.1039/d1ra05647f] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2021] [Accepted: 09/02/2021] [Indexed: 12/12/2022] Open
Abstract
Metal oxides possess exceptional physicochemical properties which make them ideal materials for critical photocatalytic applications. However, of major interest, their photocatalytic applications are hampered by several drawbacks, consisting of prompt charge recombination of charge carriers, low surface area, inactive under visible light, and inefficient as well as expensive post-treatment recovery. The immobilization of metal oxide semiconductors on materials possessing high binding strength eliminates the impractical and costly recovery of spent catalysts in large-scale operations. Notably, the synthesis of green material (ash, clay, foundry sand, and pumice)-based metal oxides could provide a synergistic effect of the superior adsorption capacity of supporting materials and the photocatalytic activity of metal oxides. This phenomenon significantly improves the overall degradation efficiency of emerging pollutants. Inspired by the novel concept of "treating waste with waste", this contribution highlights recent advances in the utilization of natural material (clay mineral and pumice)- and waste material (ash and foundry sand)-based metal oxide nanocomposites for photodegradation of various pollutants. First, principles, mechanism, challenges towards using metal oxide as photocatalysts, and immobilization techniques are systematically summarized. Then, sources, classifications, properties, and chemical composition of green materials are briefly described. Recent advances in the utilization of green materials-based metal oxide composites for the photodegradation of various pollutants are highlighted. Finally, in the further development of green materials-derived photocatalysts, we underlined the current gaps that are worthy of deeper research in the future.
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Affiliation(s)
- Bui Thanh Son
- Nanotechnology, Thu Dau Mot University Binh Duong Province Vietnam
| | - Nguyen Viet Long
- Nanotechnology, Thu Dau Mot University Binh Duong Province Vietnam
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Rodwihok C, Suwannakeaw M, Charoensri K, Wongratanaphisan D, Woon Woo S, Kim HS. Alkali/zinc-activated fly ash nanocomposites for dye removal and antibacterial applications. BIORESOURCE TECHNOLOGY 2021; 331:125060. [PMID: 33798863 DOI: 10.1016/j.biortech.2021.125060] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/04/2021] [Revised: 03/19/2021] [Accepted: 03/21/2021] [Indexed: 06/12/2023]
Abstract
Fly ash (FA), obtained as waste materials from industrial power plants, is generated in large quantities and low recycling. In this study, re-generation of waste FA as cost-effective materials with adsorbent and antibacterial applications was assessed. Alkaline/zinc-activated fly ash nanocomposite (A-FA/Zn) was prepared using one-pot hydrothermal technique. Those nanocomposites are characterized by high surface area and negatively surface charge, which are important influences contributing to an enhancement in adsorption capacity via increase in the number of adsorptive sites and electrostatic interaction between dye molecules-nanocomposites. Additionally, the presence of Zn ions in the prepared nanocomposites represents a key advantage with respect to enhancing antibacterial activity. The feasibility of further enhancing adsorption and antibacterial mechanisms was also examined. It is anticipated that the findings of this study will provide useful information with respect to the development of simple, eco-friendly and low-cost A-FA/Zn with multifunctional applications as organic dye removal and antibacterial purposes.
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Affiliation(s)
- Chatchai Rodwihok
- Civil and Environmental Engineering, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, South Korea
| | - Mayulee Suwannakeaw
- Civil and Environmental Engineering, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, South Korea
| | - Korakot Charoensri
- Department of Biotechnology, College of Life Sciences and Biotechnology, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul 02841, South Korea
| | - Duangmanee Wongratanaphisan
- Research Center in Physics and Astronomy, Faculty of Science, Chiang Mai University, Chiang Mai, 50200, Thailand
| | - Sang Woon Woo
- Civil and Environmental Engineering, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, South Korea
| | - Han S Kim
- Civil and Environmental Engineering, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, South Korea.
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11
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Liu Y, Huang J, Feng X, Li H. Thermal-Sprayed Photocatalytic Coatings for Biocidal Applications: A Review. JOURNAL OF THERMAL SPRAY TECHNOLOGY 2020; 30:1-24. [PMID: 38624582 PMCID: PMC7640575 DOI: 10.1007/s11666-020-01118-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2020] [Revised: 10/05/2020] [Indexed: 05/03/2023]
Abstract
There have been ever-growing demands for disinfection of water and air in recent years. Efficient, eco-friendly, and cost-effective methods of disinfection for pathogens are vital to the health of human beings. The photocatalysis route has attracted worldwide attention due to its highly efficient oxidative capabilities and sustainable recycling, which can be used to realize the disinfection purposes without secondary pollution. Though many studies have comprehensively reviewed the work about photocatalytic disinfection, including design and fabrication of photocatalytic coatings, inactivation mechanisms, or practical applications, systematic reviews about the disinfection photocatalysis coatings from fabrication to effort for practical use are still rare. Among different ways of fabricating photocatalytic materials, thermal spray is a versatile surface coating technique and competitive in constructing large-scale functional coatings, which is a most promising way for the future environmental purification, biomedical and life health applications. In this review, we briefly introduced various photocatalytic materials and corresponding inactivation mechanisms for virus, bacteria and fungus. We summarized the thermal-sprayed photocatalysts and their antimicrobial performances. Finally, we discussed the future perspectives of the photocatalytic disinfection coatings for potential applications. This review would shed light on the development and implementation of sustainable disinfection strategies that is applicable for extensive use for controlling pathogens in the near future.
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Affiliation(s)
- Yi Liu
- Key Laboratory of Marine Materials and Related Technologies, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201 China
- Zhejiang Engineering Research Center for Biomedical Materials, Cixi Institute of Biomedical Engineering, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201 China
| | - Jing Huang
- Key Laboratory of Marine Materials and Related Technologies, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201 China
- Zhejiang Engineering Research Center for Biomedical Materials, Cixi Institute of Biomedical Engineering, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201 China
| | - Xiaohua Feng
- Key Laboratory of Marine Materials and Related Technologies, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201 China
- Zhejiang Engineering Research Center for Biomedical Materials, Cixi Institute of Biomedical Engineering, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201 China
| | - Hua Li
- Key Laboratory of Marine Materials and Related Technologies, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201 China
- Zhejiang Engineering Research Center for Biomedical Materials, Cixi Institute of Biomedical Engineering, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201 China
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Preparation of nitrogen-doped aluminium titanate (Al2TiO5) nanostructures: Application to removal of organic pollutants from aqueous media. ADV POWDER TECHNOL 2020. [DOI: 10.1016/j.apt.2020.06.020] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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13
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Yu P, Zhou X, Li Z, Yan Y. Inactivation and change of tetracycline-resistant Escherichia coli in secondary effluent by visible light-driven photocatalytic process using Ag/AgBr/g-C 3N 4. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 705:135639. [PMID: 31841919 DOI: 10.1016/j.scitotenv.2019.135639] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2019] [Revised: 11/05/2019] [Accepted: 11/18/2019] [Indexed: 05/27/2023]
Abstract
Control of antibiotic-resistant bacteria (ARB) and their related genes in secondary effluents has become a serious issue because of increased awareness of their health risks. A considerable number of techniques have been developed in recent years, particularly in relation to advanced oxidation. However, limited information is known about cellular behavior and resistance characteristic change during photocatalytic treatment. In this study, the inactivation of tetracycline (TC)-resistant Escherichia coli (TC-E. coli), removal of TC-resistant genes (TC-RGs), and antibiotic susceptibility were evaluated by employing photocatalytic treatment using Ag/AgBr/g-C3N4 with visible light irradiation. The effects of light intensity, photocatalyst dosage, and reaction ambient temperature on photocatalysis were modelled and investigated. The rate of TC-E. coli removal was also optimized. Results demonstrated that the optimal conditions for TC-E. coli removal included light intensity of 96.0 mW/cm2, photocatalyst dosage of 211.0 mg/L, and reaction ambient temperature of 23.7 °C. Under such conditions, the ARB removal rate was 6.1 log after 90 min and the related TC-RG removal rates were 49%, 86%, 69%, and 86% for tetA, tetM, tetQ, and intl1, respectively. The minimum inhibitory concentration test after photocatalysis shows that the antibiotic resistance of TC-E. coli was enhanced, which may be mainly due to the changes in the membrane potential and resulted in difficulty in destroying the bacteria through antibiotic contact. Hence, photocatalytic treatment could be an ideal method for ARB and antibiotic-resistant gene (ARG) control in wastewater, but the health risks of the remaining ARB and ARG should be investigated further.
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Affiliation(s)
- Peng Yu
- School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, PR China; Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, University of Science and Technology Beijing, Beijing 100083, PR China
| | - Xiaoqin Zhou
- School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, PR China; Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, University of Science and Technology Beijing, Beijing 100083, PR China.
| | - Zifu Li
- School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, PR China; Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, University of Science and Technology Beijing, Beijing 100083, PR China.
| | - Yichang Yan
- School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, PR China; Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, University of Science and Technology Beijing, Beijing 100083, PR China
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14
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Ateia M, Alalm MG, Awfa D, Johnson MS, Yoshimura C. Modeling the degradation and disinfection of water pollutants by photocatalysts and composites: A critical review. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 698:134197. [PMID: 31494425 DOI: 10.1016/j.scitotenv.2019.134197] [Citation(s) in RCA: 47] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2019] [Revised: 08/20/2019] [Accepted: 08/29/2019] [Indexed: 05/26/2023]
Abstract
Recently, a series of new photocatalysts have been developed for to combat diverse bio-recalcitrant contaminants and the inactivation of bacteria. Modeling photocatalytic processes is important to assess these materials, and to understand and optimize their performance. In this study, the recent literature is critically reviewed and analyzed to identify and compare methods of modeling photocatalytic performance. The Langmuir-Hinshelwood model (L-H) has been used in many studies to rationalize the degradation kinetics of single contaminants because it is the simplest model including both the adsorption equilibrium and degradation rates. Other studies report the development of more sophisticated variants of the L-H model that include the rates of catalyst excitation, recombination of electron-hole pairs, production of reactive oxygen species (ROS), and formation of by-products. Modified Chick-Watson (CW) and Hom models have been used by many researchers to include lag phases of bacteria in the description of disinfection kinetics. Artificial neural networks (ANNs) have been used to analyze the effects of operational conditions on photocatalyst performance. Moreover, response surface methodology (RSM) has been employed for experimental design, and optimization of operational conditions. We have reviewed and analyzed all available articles that model photocatalytic activity towards water pollution, summarized and put them in context, and recommended future research directions.
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Affiliation(s)
- Mohamed Ateia
- Department of Environmental Engineering and Earth Sciences, Clemson University, Clemson, SC 29634, United States.
| | - Mohamed Gar Alalm
- Department of Public Works Engineering, Faculty of Engineering, Mansoura University, Mansoura 35516, Egypt.
| | - Dion Awfa
- Department of Civil and Environmental Engineering, School of Environment and Society, Tokyo Institute of Technology, 2-12-1, M1-4, Ookayama, Meguro-ku, Tokyo 152-8552, Japan
| | - Matthew S Johnson
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, DK-2100 Copenhagen Ø, Denmark
| | - Chihiro Yoshimura
- Department of Civil and Environmental Engineering, School of Environment and Society, Tokyo Institute of Technology, 2-12-1, M1-4, Ookayama, Meguro-ku, Tokyo 152-8552, Japan
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Fang D, Zhang S, Dai H, Hong Z, Lin Y. A self-enhanced renewable electrochemiluminescence biosensing platform for ultrasensitive detection of sialic acid. Electrochim Acta 2019. [DOI: 10.1016/j.electacta.2019.134956] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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16
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Liu SH, Lin WX. Heterostructured graphitic carbon nitride/titanium dioxide for enhanced photodegradation of low-concentration formaldehyde under visible light. J Photochem Photobiol A Chem 2019. [DOI: 10.1016/j.jphotochem.2019.04.025] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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