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Yueyu S. The synergistic degradation of pollutants in water by photocatalysis and PMS activation. WATER ENVIRONMENT RESEARCH : A RESEARCH PUBLICATION OF THE WATER ENVIRONMENT FEDERATION 2023; 95:e10927. [PMID: 37723660 DOI: 10.1002/wer.10927] [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: 04/10/2023] [Revised: 09/05/2023] [Accepted: 09/15/2023] [Indexed: 09/20/2023]
Abstract
In recent years, the synergistic degradation of water pollutants through advanced oxidation technology has emerged as a prominent research area due to its integration of various advanced oxidation technologies. The combined utilization of peroxymonosulfate (PMS) activation technology and photocatalysis demonstrates mild and nontoxic characteristics, enabling the degradation of water pollutants across a wide pH range. Moreover, this approach reduces the efficiency of electron hole recombination, broadens the catalyst's light response range, facilitates electron transfer of PMS, and ultimately improves its photocatalytic performance. The paper reviews the current research status of photocatalytic technology and PMS activation technology, respectively, while highlighting the advancements achieved through the integration of photocatalytic synergetic PMS activation technology for water pollutant degradation. Furthermore, this review delves into the mechanisms involving both free radicals and nonradicals in the reaction process and presents a promising prospect for future development in water treatment technology. PRACTITIONER POINTS: Degradation of water pollutants by photocatalysis and PMS synergistic action has emerged. Synergism can enhance the generation of free radicals. This technology can provide theoretical support for actual wastewater treatment.
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Affiliation(s)
- Song Yueyu
- Department of Architecture and Environmental Engineering, Taiyuan University, Taiyuan, China
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Mehtab A, Ahmed J, Alshehri SM, Mao Y, Ahmad T. Rare earth doped metal oxide nanoparticles for photocatalysis: a perspective. NANOTECHNOLOGY 2022; 33:142001. [PMID: 34915455 DOI: 10.1088/1361-6528/ac43e7] [Citation(s) in RCA: 25] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2021] [Accepted: 12/16/2021] [Indexed: 05/25/2023]
Abstract
Metal oxides are well-known materials that have been considered as the prominent photocatalysts. Photocatalysis is a promising way to address the environmental issues which are caused by fossil fuel the combustion and industrial pollutants. Lot of efforts such as doping of metal oxides with metals, non-metals have been made to enhance their photocatalytic activity. More specifically, in this review we have discussed detailed synthesis procedures of rare earth doped metal oxides performed in the past decades. The advantage of doping metal oxides with rare earth metals is that they readily combine with functional groups due to the 4f vacant orbitals. Moreover, doping rare earth metals causes absorbance shift to the visible region of the electromagnetic spectrum which results to show prominent photocatalysis in this region. The effect of rare earth doping on different parameters of metal oxides such as band gap and charge carrier recombination rate has been made in great details. In perspective section, we have given a brief description about how researchers can improve the photocatalytic efficiencies of different metal oxides in coming future. The strategies and outcomes outlined in this review are expected to stimulate the search for a whole new set of rare earth doped metal oxides for efficient photocatalytic applications.
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Affiliation(s)
- Amir Mehtab
- Nanochemistry Laboratory, Department of Chemistry, Jamia Millia Islamia, New Delhi-110025, India
| | - Jahangeer Ahmed
- Department of Chemistry, College of Science, King Saud University, PO Box 2455, Riyadh 11451, Saudi Arabia
| | - Saad M Alshehri
- Department of Chemistry, College of Science, King Saud University, PO Box 2455, Riyadh 11451, Saudi Arabia
| | - Yuanbing Mao
- Department of Chemistry, Illinois Institute of Technology, 3105 South Dearborn Street, Chicago, IL 60616, United States of America
| | - Tokeer Ahmad
- Nanochemistry Laboratory, Department of Chemistry, Jamia Millia Islamia, New Delhi-110025, India
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Chen W, Zhang H, Chen T, Yang L, Wu H, Tong Z, Mao N. TiO 2 modified orthocortical and paracortical cells having enhanced photocatalytic degradation and photoreduction properties. NANOTECHNOLOGY 2021; 32:025714. [PMID: 32992295 DOI: 10.1088/1361-6528/abbcab] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
In this study, cortical cells resultant from wool fibers were loaded with TiO2 nanoparticles in a hydrothermal process and were then engineered as organic-nonorganic hybrid composite photocatalysts for both photodegradation of organic dyes and photoreduction of heavy metal ions. The microstructure and photocatalytic properties of TiO2 modified cortical cells (i.e. both orthocortical and paracortical cells) were systematically characterized using a series of analytical techniques including FESEM, TEM, element analysis, Mott-Schottky curve, BET specific surface area, Zeta potentials, as well as XRD, FTIR, XPS, DRS, PL, UPS, EDS and ESR spectra. Their photocatalytic performance and trapping experiments of the TiO2 modified cortical cells were measured in the photodegradation of methylene blue (MB) dye and Congo Red (CR) dye as well as the photoreduction of Cr(VI) ions under visible light irradiation. It was found that anatase TiO2 nanoparticles were chemically grafted on the surface of the two cortical cells via O-Ti4+/O-Ti3+ bonds, and that TiO2 nanoparticles were formed inside the orthocortical cells in the hydrothermal process. The TiO2 modified orthocortical and paracortical cells possessed much higher photocatalytic efficiency than the commercially available TiO2 nanoparticle powder, Degussa P25, in the photodegradation of cationic MB dye and photoreduction of Cr(VI) ions, while their photocatalytic efficiency in the photodegradation of anionic CR dye is smaller because of their greater negative Zeta potentials and photogenerated holes as the main reactive radical species. In comparison with the TiO2 modified paracortical cells, the higher photocatalytic efficiency of the TiO2 modified orthocortical cells was demonstrated in the photodegradation of MB dye solution and this might be due to both the S-doped TiO2 nanoparticles infiltrated into the naturally hydrophilic orthocortical cells and the primary reactive radical species of photogenerated holes being trapped in the cells.
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Affiliation(s)
- Wendou Chen
- Research Centre for Functional Textile Materials, School of Textile Science & Engineering, Xi'an Polytechnic University, Xi'an 710048, People's Republic of China
- Key Laboratory of Functional Textile Material and Product (Xi'an Polytechnic University), Ministry of Education, Xi'an, Shaanxi 710048, People's Republic of China
| | - Hui Zhang
- Research Centre for Functional Textile Materials, School of Textile Science & Engineering, Xi'an Polytechnic University, Xi'an 710048, People's Republic of China
- Key Laboratory of Functional Textile Material and Product (Xi'an Polytechnic University), Ministry of Education, Xi'an, Shaanxi 710048, People's Republic of China
| | - Tianyu Chen
- Research Centre for Functional Textile Materials, School of Textile Science & Engineering, Xi'an Polytechnic University, Xi'an 710048, People's Republic of China
- Key Laboratory of Functional Textile Material and Product (Xi'an Polytechnic University), Ministry of Education, Xi'an, Shaanxi 710048, People's Republic of China
| | - Limeng Yang
- Research Centre for Functional Textile Materials, School of Textile Science & Engineering, Xi'an Polytechnic University, Xi'an 710048, People's Republic of China
- Key Laboratory of Functional Textile Material and Product (Xi'an Polytechnic University), Ministry of Education, Xi'an, Shaanxi 710048, People's Republic of China
| | - Hailiang Wu
- Key Laboratory of Functional Textile Material and Product (Xi'an Polytechnic University), Ministry of Education, Xi'an, Shaanxi 710048, People's Republic of China
| | - Zhi Tong
- School of Environmental and Chemical Engineering, Xi'an Polytechnic University, Xi'an 710048, People's Republic of China
| | - Ningtao Mao
- School of Design, University of Leeds, Leeds, LS2 9JT, United Kingdom
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Effect of titanium dioxide and gadolinium dopants on photocatalytic behavior for acriflavine dye. J RARE EARTH 2020. [DOI: 10.1016/j.jre.2019.09.006] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Ben Chobba M, Messaoud M, Weththimuni ML, Bouaziz J, Licchelli M, De Leo F, Urzì C. Preparation and characterization of photocatalytic Gd-doped TiO 2 nanoparticles for water treatment. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:32734-32745. [PMID: 30864042 DOI: 10.1007/s11356-019-04680-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2018] [Accepted: 02/22/2019] [Indexed: 06/09/2023]
Abstract
In recent years, the photocatalytic process by using TiO2 nanoparticles (NPs) has produced a great interest in wastewater treatment due to its interesting features such as low-cost, environmental compatibility, and especially capacity to eliminate persistent organic compounds as well as microorganisms in water. In the present work, the photocatalytic activity of Gd-doped TiO2 nanopowders, with different doping amount 0.1, 1, and 5 mol% synthesized by the sol-gel method, was studied under UV/Visible irradiation for water treatment application. The Gd-doped TiO2 nanoparticles were investigated for their photocatalytic degradation of methylene blue (MB) dye and antibacterial activities against two bacterial strains namely Stenotrophomonas maltophilia (S. maltophilia) and Micrococcus luteus (M. luteus). MB dye was used as a pollutant model to estimate reactive oxygen species (ROS) generation and to correlate killing action of nanoparticles with the generation of ROS. Scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), X-ray diffraction (XRD), and Raman spectroscopy were used to characterize the as-synthesized nanomaterials. Photocatalytic, as well as antibacterial tests, showed that doping with an appropriate amount of Gd could reduce the radiative recombination process of photogenerated electron-hole pairs in TiO2 and induce a significant enhancement in photocatalytic and consequently antibacterial activity. The experimental sequence of bactericidal activity and photocatalytic degradation efficiency exhibited by the different gadolinium-doped nanoparticles was the following: 0.1 mol% Gd-doped TiO2 > 1 mol% Gd-doped TiO2 > 5 mol% Gd-doped TiO2 > pure titania.
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Affiliation(s)
- Marwa Ben Chobba
- Laboratory of Industrial Chemistry, National School of Engineering, University of Sfax, Box 1173, 3038, Sfax, Tunisia.
| | - Mouna Messaoud
- Laboratory of Industrial Chemistry, National School of Engineering, University of Sfax, Box 1173, 3038, Sfax, Tunisia
| | | | - Jamel Bouaziz
- Laboratory of Industrial Chemistry, National School of Engineering, University of Sfax, Box 1173, 3038, Sfax, Tunisia
| | | | - Filomena De Leo
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Viale F. Stagno d'Alcontres, 31, Messina, Italy
| | - Clara Urzì
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Viale F. Stagno d'Alcontres, 31, Messina, Italy
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Phattepur H, Gowrishankar BS, Nagaraju G. Synthesis of gadolinium-doped TiO2 thin films by sol–gel spin coating technique and its application in degradation of rhodamine-B. INDIAN CHEMICAL ENGINEER 2018. [DOI: 10.1080/00194506.2018.1529632] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- Harish Phattepur
- Department of Chemical Engineering, Siddaganga Institute of Technology (Affiliated to VTU, Belagavi), Tumakuru, India
| | - B. S. Gowrishankar
- Department of Chemical Engineering, Siddaganga Institute of Technology (Affiliated to VTU, Belagavi), Tumakuru, India
- Department of Biotechnology, Siddaganga Institute of Technology (Affiliated to VTU, Belagavi), Tumakuru, India
| | - G. Nagaraju
- Department of Chemistry, Siddaganga Institute of Technology (Affiliated to VTU, Belagavi), Tumakuru, India
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Hunagund SM, Desai VR, Barretto DA, Pujar MS, Kadadevarmath JS, Vootla S, Sidarai AH. Photocatalysis effect of a novel green synthesis gadolinium doped titanium dioxide nanoparticles on their biological activities. J Photochem Photobiol A Chem 2017. [DOI: 10.1016/j.jphotochem.2017.06.003] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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A comparative study on characterization and photocatalytic activities of gadolinium–boron codoped and mono-doped TiO2 nanoparticles. RESEARCH ON CHEMICAL INTERMEDIATES 2011. [DOI: 10.1007/s11164-011-0419-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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Rogow DL, Swanson CH, Oliver AG, Oliver SRJ. Two Related Gadolinium Aquo Carbonate 2-D and 3-D Structures and Their Thermal, Spectroscopic, and Paramagnetic Properties. Inorg Chem 2009; 48:1533-41. [DOI: 10.1021/ic801844b] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- David L. Rogow
- Department of Chemistry and Biochemistry, University of California, Santa Cruz, 1156 High Street, Santa Cruz, California 95064
| | - Claudia H. Swanson
- Department of Chemistry and Biochemistry, University of California, Santa Cruz, 1156 High Street, Santa Cruz, California 95064
| | - Allen G. Oliver
- Department of Chemistry and Biochemistry, University of California, Santa Cruz, 1156 High Street, Santa Cruz, California 95064
| | - Scott R. J. Oliver
- Department of Chemistry and Biochemistry, University of California, Santa Cruz, 1156 High Street, Santa Cruz, California 95064
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