1 Key Laboratory of Urban Storm Water System and Water Environment (Ministry of Education), Beijing University of Civil Engineering and Architecture, Beijing 100044, China 2 Laboratory for Micro-sized Functional Materials College of Elementary Education, Capital Normal University, Beijing 100048, China
Photocatalytic technology is an effective way to solve the two major problems of environmental problems and energy crisis in today's human society. Semiconductor materials were favored in early research. However, a single semiconductor photocatalyst has disadvantages such as poor response to visible light and easy recombination of electron-hole pairs. Photocatalytic technology has low efficiency in the application of dye wastewater degradation. Therefore, researchers have conducted in-depth studies on the new composite nanomaterials as photocatalysts to degrade dye wastewater. The research progress and main results of three new composite nanomaterials of graphene, metal organic framework, and carbon quantum dots for photocatalytic degradation of pollutants in dye wastewater were introduced in this article. According to the idea of design and upgrading of composite nanomaterials, the preparation methods of some new composite nanomaterials were briefly described, and the degradation efficiency of target pollutants was analyzed. By summarizing the performance of different photocatalytic materials to degrade pollutants in water, the future development trend was prospected. The future development trend and research focus of new composite nanomaterials in the direction of photocatalysis are targeted treatment of wastewater and industrialization.
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