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基于半导体材料的光催化技术有望利用清洁太阳能治理环境污染和缓解能源短缺问题。近年来,一些窄带隙银系半导体材料在可见光照射下具有优异的氧化还原能力,成为光催化材料研究领域的热点之一。然而,单一银系光催化材料成本高、稳定性差从而限制其实际应用,因此,复合光催化材料得到广泛关注。最近,模拟植物光合作用过程而建立起来的全固态Z型光催化体系不仅增强银系材料光催化活性,同时又提高其稳定性和降低使用成本。本文首先阐述了Z型光催化体系的由来和反应机制,详细论述了目前基于银系半导体材料的全固态Z型光催化体系的构建、应用及反应机理。在此基础上,指出了这些体系在研究中存在的一些问题,并对其研究前景进行了展望。
Based on semiconductor materials, photocatalytic technology is expected to use clean solar energy to control environmental pollution and ease the energy shortage. In recent years, some narrow-bandgap silver semiconductor materials have excellent redox capability under visible light irradiation, and become one of the hot spots in the research field of photocatalytic materials. However, the single silver photocatalytic material is costly and poorly stable, which limits its practical application. Therefore, composite photocatalytic materials have attracted much attention. Recently, the all-solid-state Z-type photocatalytic system that mimics the photosynthetic process of plants not only enhances the photocatalytic activity of silver-based materials, but also increases its stability and reduces the cost of use. In this paper, firstly, the origin and reaction mechanism of Z-type photocatalytic system are elaborated, and the construction, application and reaction mechanism of all-solid Z-type photocatalytic system based on silver semiconductor materials are discussed in detail. On this basis, some problems existing in the research of these systems are pointed out and the prospect of their research is prospected.