Research Progress on Photocatalytic Reduction of Heavy Metal Ions by g-C3N4
YANG Yue1, ZHAO Bin2, ZHANG Youkui2, LI Min1, DUAN Tao2
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
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.
作者简介: 杨玥,2016年6月毕业于绵阳师范学院,获得工学学士学位。现为绵阳师范学院环境工程学院硕士研究生,在李敏教授、西南科技大学段涛教授的指导下进行研究。目前主要研究领域为有机核废液光催化降解。 Journal of Nuclear Materials、ACS Sustainable Chem. & Eng.等国内外期刊上发表SCI学术论文40多篇,合作出版学术专著2部、参编教材2部,获得专利授权15项、省级科技进步三等奖1项、地市级科技进步一、二等奖2项;主讲《核材料概论》等本科生课程,获国家优秀教育成果奖二等奖1项、四川省优秀高等教育成果奖一等奖2项、校级教学成果特等奖1项。
引用本文:
杨玥, 赵斌, 张友魁, 李敏, 段涛. g-C3N4光催化还原净化重金属离子的研究进展[J]. 材料导报, 2020, 34(17): 17132-17138.
YANG Yue, ZHAO Bin, ZHANG Youkui, LI Min, DUAN Tao. Research Progress on Photocatalytic Reduction of Heavy Metal Ions by g-C3N4. Materials Reports, 2020, 34(17): 17132-17138.
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2020, Vol. 34 
