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。
Photocatalytic technology based on semiconductor materials is expected to use clean solar energy to control the environmental pollution and ease the energy shortages.In recent years, some silver-containing semiconductor materials with narrow band gap exhibit excellent oxidation and reduction ability under visible light irradiation, hence, silver-containing photocatalysts have become one of the focuses in the field of photocatalytic materials. Single silver-containing photocatalytic materials have high cost and poor stability, which limit their practical applications. As a result, the composite photocatalytic materials have been widely studied. Recently, simulating the photosynthesis process of green plants, all-solid-state Z-scheme photocatalytic systems are established, which can enhance the stability and reduce the cost of silver-containing photocatalytic materials as well as improve their photocatalytic performances. In this paper, we firstly describes the derivation and reaction mechanism about the all-solid-state Z-scheme photocatalytic systems, and then reviews the construction, application and reaction mechanism of silver-containing semiconductor materials-based all-solid-state Z-scheme photocatalytic systems so far.At last, we point out some existing problems about these silver-containing semiconductor materials-based Z-scheme photocatalytic systems, and their research prospects are also proposed.
Contents
1 Introduction
2 The derivation and reaction mechanism of all-solid-state Z-scheme photocatalytic systems
3 The research findings of silver-containing semiconductor materials-based Z-scheme
photocatalytic systems
3.1 AgX-based Z-scheme photocatalytic systems
3.2 Ag3PO4-based Z-scheme photocatalytic systems
3.3 Ag2CO3-based Z-scheme photocatalytic systems
3.4 Ag2MO4-based Z-scheme photocatalytic system
4 Conclusion
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