基于g-C<sub>3</sub>N<sub>4</sub>异质结复合材料光催化降解污染物的研究进展

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Abstract With the rapid development of modern industry, more and more organic and heavy metal pollutants are discharged into the environment. Photocatalytic degradation is a clean, efficient and low-cost treatment method. g-C₃N₄, as an emerging catalyst driven by non-metallic visible light, has many advantages, such as cheap and easy to obtain, non-toxic and harmless. However, there are obvious problems, such as narrow response range of visible light, high photoelectron-hole recombination rate, resulting in low quantum yield and low photocatalytic efficiency.
Studies have found that different types of semiconductors, such as partial metal sulfide, metal oxide and ternary compound, can form heterogeneous structures with g-C₃N₄. By regulating the morphology of semiconductors, they can form a good lattice match with g-C₃N₄ to different degrees, which is conducive to the transfer of electrons between two or more semiconductors. By constructing heterogeneous structures, the band gap width can be effectively reduced, the optical response range can be widened, the photoelectron-hole recombination rate can be reduced, and the photocatalytic efficiency can be improved.
In this paper, the g-C₃N₄-based composite semiconductor materials commonly used in recent years are described. They all achieve good separation of electron and hole pair to varying degrees, and effectively eliminate the pollution of various organic compounds and heavy metals. Therefore, they are photocatalyst candidates with application value.

Key words： g-C₃N₄ heterostructure organic heavy metal photocatalysis

Published: 25 November 2019

CLC number:

O613.71

Fund:This work was financially supported by the National Natural Science Foundation of China (21561002, 21866004, 21866003).

About author:: Chang Liu received his B.S. degree in engineering from Southwest University of Science and Technology in 2017. Now he is a master’s student in the Faculty of Nuclear Science and Engineering, East China University of Technology (ECUT). The research was conducted under the guidance of Prof. Yunhai Liu. At present, the main research field is isolation and enrichment of radionuclides.
Yunhai Liu received his Ph.D. degree in polymer chemistry and physics from Wuhan University. He is currently a professor in Faculty of Nuclear Science and Engineering,East China University of Technology (ECUT), doctoral supervisor. He is mainly engaged in scientific research work in the fields of design and pre-paration of new functional materials, adsorption and separation of radionuclides and pollution control. He has published more than 50 academic papers indexed by SCI in journals such as J Hazard Mater, Chem Eng J, Appl Surf Sci and J Ra-dioanal Nucl Chem, apply for 3 invention patents.

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Cite this article:

LIU Chang,ZHANG Zhibin,WANG Youqun, et al. Progress in Photocatalytic Degradation of Pollutants Based on g-C₃N₄ HeterogeneousJunction Composites[J]. Materials Reports, 2019, 33(Z2): 104-112.

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http://www.mater-rep.com/EN/ OR http://www.mater-rep.com/EN/Y2019/V33/IZ2/104

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