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可见光半导体光催化剂具有高效利用太阳能从而解决能源及环境问题的优势,引起光催化及其他领域人们的关注。铋系光催化剂多属于窄带隙半导体材料,能够吸收太阳光谱中的大量可见光。此外,铋系光催化剂独特的层状晶体结构及较深的价带位置决定了其具有较高的催化活性,成为近年来半导体光催化领域研究的热点。碳基质材料由于具有比表面积大、热和化学稳定性高以及导电能力强等物理化学性质而被人们广泛研究。将碳材料与铋系半导体进行复合,两者之间的协同效应能够增强对反应物的吸附量,拓宽对太阳光的吸收范围,加速电子/空穴对的分离,从而提高催化活性。此外,碳材料修饰的铋光催化剂更易被分离及回收利用,可有效降低应用成本,具有潜在的应用前景。本文对近年来利用碳基质材料修饰铋系光催化剂的类型、制备方法、结构与性能、作用机理及其应用研究进行了综述,提出了目前利用碳材料修饰铋系光催化剂在材料设计、机理研究及应用等方面存在的主要问题,并对其未来发展方向进行了展望。
Visible semiconductor photocatalyst has the advantage of using solar energy efficiently to solve energy and environmental problems, and attracts people’s attention in photocatalysis and other fields. Bismuth-based photocatalysts are mostly narrow-bandgap semiconductors that absorb large amounts of visible light in the solar spectrum. In addition, the unique layered crystal structure and deep valence band position of the bismuth-based photocatalyst has determined its high catalytic activity and has become a hot spot in the field of semiconductor photocatalysis in recent years. Carbon matrix materials have been extensively studied due to their physicochemical properties such as large specific surface area, high thermal and chemical stability, and high conductivity. The carbon material and the bismuth-based semiconductor compound, the synergy between the two can enhance the amount of reactant adsorption, broaden the range of sunlight absorption, accelerate the separation of electron / hole pairs, thereby enhancing the catalytic activity. In addition, the carbon material modified bismuth photocatalyst can be more easily separated and recycled, which can effectively reduce the application cost and have potential application prospects. In this paper, the types, preparation methods, structure and properties, mechanism and application of bismuth photocatalysts modified by carbon matrix materials in recent years are reviewed. The current research on the design and mechanism of bismuth photocatalysts modified by carbon materials is proposed And application of the main problems, and its future development prospects.