MATERIALS AND SUSTAINABLE DEVEL OPMENT:ENVIRONMENT-FRIENDLY MATERIAL S AND MATERIAL S FOR ENVIRONMENTAL REMEDIATION |
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Research Progress on Photocatalytic Reduction of Heavy Metal Ions by g-C3N4 |
YANG Yue1, ZHAO Bin2, ZHANG Youkui2, LI Min1, DUAN Tao2
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1 School of Resources and Environmental Engineering, Mianyang Teachers College, Mianyang 621000, China 2 National Co-Innovation Center for Nuclear Waste Disposal and Environmental Safety, Southwest University of Science and Technology, Mianyang 621000,China |
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Abstract With the rapid development of society, the discharge of pollutants is increasing, which seriously damages the ecological environment. In particular, heavy metal ions in wastewater have severely damaged the aquatic environment and caused great damage to aquatic life, plants and human health. Therefore, the treatment of heavy metal ions in wastewater is of great significance to protect the water ecological environment. At present, researchers have explored many methods for purifying heavy metal ions in wastewater, including physical remediation, chemical treatment, biological treatment, membrane separation, and photocatalysis. Among them, photocatalysis is an environmentally friendly and energy-saving method, and its core is photocatalytic materials. Graphite-like carbon nitride (g-C3N4) has become the most widely studied non-metallic photocatalyst in recent years due to its good chemical stability, thermal stability and photoelectric properties. However, pure carbon nitride has the disadvantages of small specific surface area, large band gap, small visible light reaction range, and high photo-electron hole recombination rate. Therefore, carbon nitride needs to be modified to improve its photocatalytic activity. The modification methods of carbon nitride mainly include morphology control, doping modification, precious metal deposition, and heterojunction method. This article focuses on the research status of modified carbon nitride as a photocatalyst for the photocatalytic treatment of hexavalent uranium ions (U6+), hexavalent chromium ions (Cr6+), copper ions (Cu-EDTA), and elemental mercury (Hg0). The research progress of carbon nitride reduction and purification of heavy metal ions is summarized to provide a reference for future photocatalysis research.
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Published: 02 September 2020
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Fund:Mianyang Normal University 2019 Graduate Innovation Practice Fund Project (CX201905) |
About author:: Yue Yang graduated from Mianyang Teachers College in June 2016 with a bachelor's degree in engineering. She is currently a graduate student in the School of Environmental Engineering at Mianyang Teachers College. She is under the guidance of Prof. Li Min and Professor Duan Tao from Southwest University of Science and Technology. At present, her main research field is photocatalytic degradation of organic nuclear waste liquid. Tao Duan, Ph.D., professor. Member of China Society of Mineral Rock Geochemistry, member of China Nuc-lear Society, standing committee member of China Nuc-lear Society Nuclear Physics and Radiochemistry Branch, academic committee member, director of Sichuan Nuclear Society, reserve candidate of academic and technical leader in Sichuan Province, expert with outstanding contribution in Sichuan Province, the famous teaching teacher of Southwest University of Science and Techno-logy, the leader of the National Defense Science and Technology Bureau of Radiation Protection and Environmental Protection. He is currently the dean of the National Defense Science and Technology College of Southwest University of Science and Technology and the Vice President of the Sichuan Military and Civil Integration Research Institute. In recent years, he has been engaged in teaching and research in the fields of new energy and nuclear environmental safety. Participated in more than 10 projects such as the National 863 Program, the National Science and Technology Support Program, and the National Natural Science Foundation Project. At present, he has presided over and researched 9 national-level projects such as major national science and technology projects and national defense basic scientific research projects, and one new research and practice project of the Ministry of Education. The first author or correspondent author published more than 40 SCI academic papers in domestic and foreign journals such as Journal of Physics, Journal of Nuclear Materials, ACS Sustainable Chem. & Eng., and co-published 2 academic monographs and 2 textbooks, 15 patents were granted, 1st provincial science and technology progress award, 1 provincial and municipal science and technology progress 1st and 2nd prizes; undergraduate courses such as “Introduction to Nuclear Materials”, won the second prize of National Excellent Educational Achievement Award 1 item, 2 first prizes of Sichuan Excellent Higher Education Achievement Award, and 1 special prize of school-level teaching achievements. |
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