我铋系半导体光催化剂研究进展

关键词:

催化剂,

光化学,

制备,

改性,

环境,

能源

Abstract:

Due to the unique layered structure and appropriate band gap, bismuth-based semiconductor materials have favorable visible light response-ability and stable photochemical characteristics. As a new group of environment-friendly photocatalysts, bismuth-based semiconductor materials have attracted extensive attentions in the fields of environmental remediation and energy crisis resolution and hence have become a research hotspot in recent years. However, there are still some urgent yet unsolved problems in the practical large-scale application of bismuth-based semiconductor photocatalysts, such as high recombination rate of photogenerated carriers, limited response range to the visible spectrum, poor photocatalytic activity, weak reduction ability. Firstly, this paper outlines the typical properties, preparation methods, and reaction mechanism of bismuth-based semiconductor materials with the focuses on their research progress in photocatalysis, including morphology regulation, heterojunction of construction, ion doping, carbonaceous material doping, noble metal deposition, dye-sensitized, and other modification methods. It also introduces the applications of bismuth-based semiconductor photocatalysts in the degradation of water pollutants, sterilization, disinfection, air purification, hydrogen evolution, CO2 reduction, and organic synthesis. Finally, the prospects for the development of bismuth-based semiconductor photocatalysts are also discussed, and it is pointed out that the future research directions should be focused on multi-means coupling modification, expanding the application fields and profoundly exploring the reaction mechanism.

Key words:

catalyst,

photochemistry,

preparation,

modification,

environment,

energy