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John KI, Ho G, Li D. Recent progresses in synthesis and modification of g-C 3N 4 for improving visible-light-driven photocatalytic degradation of antibiotics. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2024; 89:3047-3078. [PMID: 38877630 DOI: 10.2166/wst.2024.166] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/07/2024] [Accepted: 05/11/2024] [Indexed: 06/16/2024]
Abstract
Graphitic carbon nitride (g-C3N4) is a widely studied visible-light-active photocatalyst for low cost, non-toxicity, and facile synthesis. Nonetheless, its photocatalytic efficiency is below par, due to fast recombination of charge carriers, low surface area, and insufficient visible light absorption. Thus, the research on the modification of g-C3N4 targeting at enhanced photocatalytic performance has attracted extensive interest. A considerable amount of review articles have been published on the modification of g-C3N4 for applications. However, limited effort has been specially contributed to providing an overview and comparison on available modification strategies for improved photocatalytic activity of g-C3N4-based catalysts in antibiotics removal. There has been no attempt on the comparison of photocatalytic performances in antibiotics removal between modified g-C3N4 and other known catalysts. To address these, our study reviewed strategies that have been reported to modify g-C3N4, including metal/non-metal doping, defect tuning, structural engineering, heterostructure formation, etc. as well as compared their performances for antibiotics removal. The heterostructure formation was the most widely studied and promising route to modify g-C3N4 with superior activity. As compared to other known photocatalysts, the heterojunction g-C3N4 showed competitive performances in degradation of selected antibiotics. Related mechanisms were discussed, and finally, we revealed current challenges in practical application.
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Affiliation(s)
- Kingsley Igenepo John
- College of Science, Technology, Engineering & Mathematics, Murdoch University, Murdoch, WA 6150, Australia
| | - Goen Ho
- College of Science, Technology, Engineering & Mathematics, Murdoch University, Murdoch, WA 6150, Australia
| | - Dan Li
- College of Science, Technology, Engineering & Mathematics, Murdoch University, Murdoch, WA 6150, Australia E-mail:
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Kalidasan K, Mallapur S, Munirathnam K, Nagarajaiah H, Reddy MBM, Kakarla RR, Raghu AV. Transition metals-doped g-C 3N 4 nanostructures as advanced photocatalysts for energy and environmental applications. CHEMOSPHERE 2024; 352:141354. [PMID: 38311034 DOI: 10.1016/j.chemosphere.2024.141354] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Revised: 01/07/2024] [Accepted: 01/31/2024] [Indexed: 02/06/2024]
Abstract
Graphitic carbon nitride (g-C3N4)-based heterostructured photocatalysts have received significant attention for its potential applications in the treatment of wastewater and hydrogen evolution. The utilization of semiconductor materials in heterogeneous photocatalysis has recently received great attention due to their potential and eco-friendly properties. Doping with metal ions plays a crucial role in altering the photochemical characteristics of g-C3N4, effectively enhancing photoabsorption into the visible range and thus improving the photocatalytic performance of doped photocatalysts. As an emerging nanomaterial, nanostructured g-C3N4 represents a visible light-active semiconducting photocatalyst that has attracted significant interest in the photocatalysis field, particularly for its practical water treatment applications. To the best of our knowledge, investigations of functionalized photocatalytic (PC) materials on 3d transition metal-doped g-C3N4 remain unexplored in the existing literature. g-C3N4 based heterohybrid photocatalysts have demonstrated excellent reusability, making them highly promising for wastewater treatment applications. This paper describes the overview of numerous studies conducted on the heterostructured g-C3N4 photocatalysts with various 3d metals. Research studies have revealed that the introduction of element doping with various 3d transition metals (e.g., Ti, Mn, Fe, Co, Ni, Cu, Zn, etc.) into g-C3N4 is an efficient approach to enhance degradation efficacy and boost photocatalytic activity (PCA) of doped g-C3N4 catalysts. Moreover, the significance of g-C3N4 heterostructured nanohybrids is highlighted, particularly in the context of wastewater treatment applications. The study concludes by providing insights into future perspectives in this developing area of research, with a specific focus on the degradation of various organic contaminants.
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Affiliation(s)
- Kavya Kalidasan
- Department of Chemistry, School of Applied Sciences, REVA University, Kattigenahalli, Yelahanka, Bangalore, 560064, India
| | - Srinivas Mallapur
- Department of Chemistry, School of Applied Sciences, REVA University, Kattigenahalli, Yelahanka, Bangalore, 560064, India.
| | - K Munirathnam
- Department of Physics, School of Applied Sciences, REVA University, Kattigenahalli, Yelahanka, Bangalore, 560064, India
| | - H Nagarajaiah
- Department of Chemistry, School of Applied Sciences, REVA University, Kattigenahalli, Yelahanka, Bangalore, 560064, India
| | - M B Madhusudana Reddy
- Department of Chemistry, School of Applied Sciences, REVA University, Kattigenahalli, Yelahanka, Bangalore, 560064, India
| | - Raghava Reddy Kakarla
- School of Chemical and Biomolecular Engineering, The University of Sydney, Sydney, NSW 2006, Australia.
| | - Anjanapura V Raghu
- Faculty of Allied Health Sciences, BLDE (Deemed-to-be University), Vijayapura, 586103, Karnataka, India.
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Shen Z, Zhu Z, Wang G, Miao Y, Lu W. Porous organic semiconductor/PET composite fibre for the synergistic removal of hexavalent chromium and organic pollutants under sunlight. ENVIRONMENTAL TECHNOLOGY 2024:1-13. [PMID: 38037354 DOI: 10.1080/09593330.2023.2283085] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2023] [Accepted: 08/19/2023] [Indexed: 12/02/2023]
Abstract
In this study, the porous graphite phase carbon nitride photocatalyst (P-g-C3N4) is prepared by the CaCO3 template method, and then P-g-C3N4/T-polyethylene terephthalate (T-PET) catalytic fibre is prepared by the padding method. P-g-C3N4 can provide more active sites than g-C3N4 as proved by the Brunauer-Emmett-Teller and the UV-Visible diffuse reflectance test. P-g-C3N4 powder catalyst successfully supports PET fibre as proved by scanning electron microscope, Fourier infrared spectroscopy and X-ray diffraction spectroscopy. The photocatalytic performance of P-g-C3N4/T-PET catalytic fibre is tested by constructing a single hexavalent chromium or hexavalent chromium/organic pollutant binary pollution system. The potential application value of P-g-C3N4/T-PET catalytic fibre is further explored by simulating the complex actual water environment. After five recycles, P-g-C3N4/T-PET catalytic fibre shows good catalytic performance. The mechanism of P-g-C3N4/PET photocatalytic degradation of organic pollutants is proposed through the capture agent experiment and electron paramagnetic resonance spectroscopy. Among them, •O2- is the most important active species of P-g-C3N4 catalytic fibre, which is used for the oxidation of organic pollutants. At the same time, photoelectrons generated by the catalytic fibre are used to reduce hexavalent chromium. The efficiency of P-g-C3N4 to remove pollutants is improved by using PET fibre as a carrier, which not only solves the problem of difficult recovery of powder catalysts but also provides more active sites.
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Affiliation(s)
- Zhenyu Shen
- National Engineering Lab for Textile Fiber Materials and Processing Technology (Zhejiang), Zhejiang Sci-Tech University, Hangzhou, People's Republic of China
| | - Zhexin Zhu
- National Engineering Lab for Textile Fiber Materials and Processing Technology (Zhejiang), Zhejiang Sci-Tech University, Hangzhou, People's Republic of China
| | - Gangqiang Wang
- National Engineering Lab for Textile Fiber Materials and Processing Technology (Zhejiang), Zhejiang Sci-Tech University, Hangzhou, People's Republic of China
| | - Yongquan Miao
- National Engineering Lab for Textile Fiber Materials and Processing Technology (Zhejiang), Zhejiang Sci-Tech University, Hangzhou, People's Republic of China
| | - Wangyang Lu
- National Engineering Lab for Textile Fiber Materials and Processing Technology (Zhejiang), Zhejiang Sci-Tech University, Hangzhou, People's Republic of China
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Li D, Cheng Y, Luo Y, Teng Y, Liu Y, Feng L, Wang N, Zhao Y. Electrospun Nanofiber Materials for Photothermal Interfacial Evaporation. MATERIALS (BASEL, SWITZERLAND) 2023; 16:5676. [PMID: 37629967 PMCID: PMC10456569 DOI: 10.3390/ma16165676] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Revised: 08/02/2023] [Accepted: 08/15/2023] [Indexed: 08/27/2023]
Abstract
Photothermal interfacial evaporation with low cost and environmental friendliness has attracted much attention. However, there are still many problems with this technology, such as heat loss and salt accumulation. Due to their different structures and adjustable chemical composition, electrospun nanofiber materials generally exhibit some unique properties that provide new approaches to address the aforementioned issues. In this review, the rational design principles for improving the total efficiency of solar evaporation are described for thermal/water management systems and salt-resistance strategies. And we review the state-of-the-art advancements in photothermal evaporation based on nanofiber materials and discuss their derivative applications in desalination, water purification, and power generation. Finally, we highlight key challenges and opportunities in both fundamental research and practical applications to inform further developments in the field of interfacial evaporation.
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Affiliation(s)
- Dianming Li
- School of Materials Science and Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China; (D.L.); (Y.L.); (Y.L.)
| | - Yingying Cheng
- School of Materials Science and Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China; (D.L.); (Y.L.); (Y.L.)
| | - Yanxia Luo
- School of Materials Science and Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China; (D.L.); (Y.L.); (Y.L.)
| | - Yuqin Teng
- School of Materials Science and Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China; (D.L.); (Y.L.); (Y.L.)
| | - Yanhua Liu
- School of Materials Science and Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China; (D.L.); (Y.L.); (Y.L.)
| | - Libang Feng
- School of Materials Science and Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China; (D.L.); (Y.L.); (Y.L.)
| | - Nü Wang
- Key Laboratory of Bioinspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry, Beihang University, Beijing 100191, China
| | - Yong Zhao
- Key Laboratory of Bioinspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry, Beihang University, Beijing 100191, China
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Ayagh K, Farrokhi M, Yang JK, Shirzad-Siboni M. Facile provision of CuO-Kaolin nanocomposite for boosted sonocatalytic removal of Cr(VI) from hydrous media. ENVIRONMENTAL TECHNOLOGY 2023; 44:342-353. [PMID: 34407739 DOI: 10.1080/09593330.2021.1970822] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2021] [Accepted: 08/11/2021] [Indexed: 06/13/2023]
Abstract
Nowadays, nanoscale materials have been widely applied in the removal of contaminants from the water system. Reduction of Cr(VI) (as a poisonous species) to Cr(III) (as a slight toxic species) was performed using CuO-Kaolin with ultrasound (US) irradiation. The CuO-Kaolin nanocomposite was synthesized via a facile co-precipitation method. Then X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscope and Energy dispersive X-ray spectroscopy analyses were performed to identify the structural features of CuO-Kaolin. The role of influential parameters for the reduction of Cr(VI) was investigated in sonocatalytic advanced oxidation system. About 89.35% of Cr(VI) was removed via US/CuO-Kaolin process after 90 min at optimum conditions (pH = 3, sonocatalyst dosage = 1 g L-1 and [Cr (VI)]0 = 20 mg L-1). This outstanding result was due to the synergistic effect of the increased electron delivery to conduction band on CuO-Kaolin nanocomposite and the increased reactive surface region of nanoparticles by sonication. The presence of H2O2 as an amplifier improved the removal efficiency of Cr(VI) from 89.35% to 100% after 20 min. Kinetic experimental results were well described by a pseudo-first-order kinetic model. Desorption experiments showed excellent stability of sonocatalyst during the reaction and maintenance of the catalytic activity up to 10 sequential cycles.
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Affiliation(s)
- Kobra Ayagh
- Department of Environmental Health Engineering, School of Health, Guilan University of Medical Sciences, Rasht, Iran
| | - Mehrdad Farrokhi
- Health in Emergencies and Disasters Research Center, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran
| | - Jae-Kyu Yang
- Department of Environmental Engineering, Kwangwoon University, Seoul, Korea
| | - Mehdi Shirzad-Siboni
- Department of Environmental Health Engineering, School of Health, Guilan University of Medical Sciences, Rasht, Iran
- Research Center of Health and Environment, Guilan University of Medical Sciences, Rasht, Iran
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