(1. 燕山大学 亚稳材料制备技术与科学国家重点实验室,秦皇岛 066004;
2. 燕山大学 环境与化学工程学院 河北省应用化学重点实验室,秦皇岛 066004)
摘 要: 光催化技术是解决当今社会能源短缺、水体污染等问题的有效手段。综述了近几年钙钛矿(ABO3)/石墨相氮化碳(g-C3N4)复合光催化剂的最新研究进展。归纳总结了包括原位水热生长法及热溶剂法、简单煅烧法、物理混合法等几种该类复合材料的制备方法,分类阐述当B位是Ti或Ta以及A位为La时,其在光催化分解水制氢以及有机污染物降解方面的研究现状,解析此类复合材料具有良好光催化性能的原因,以及在不同类型异质结下的光催化作用机理。提出目前关于ABO3/g-C3N4复合光催化剂的研究中存在的问题和当前该领域的发展趋势。
关键字: 石墨相氮化碳;钙钛矿型氧化物;复合材料;光催化
(1. State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, China;
2. Hebei Key Laboratory of Applied Chemistry, School of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao 066004, China)
Abstract:The development of industry and technology has caused energetic and environmental problems, such as energy shortages and water pollution in today’s society. The photocatalytic technology is an effective means to solve these problems, and photocatalyst is one of the main factors affecting photocatalytic technology. The graphite phase carbon nitride(g-C3N4) plays an important role in the field of photocatalysis because of its wide source of raw materials, non-toxicity, stable chemical properties, and relatively narrow band gap (2.7 eV) for visible light response. Perovskite type oxide(ABO3) has a unique stable structure and excellent electronic configuration. The existence of non-stoichiometric oxygen vacancies will provide more reaction sites for photocatalytic reactions. The recent advances of ABO3/g-C3N4 composite in photocatalytic hydrogen evolution and organic pollutant degradation were reviewed. The reason for the composite with good photocatalytic performance was analyzed. Finally, the challenges remaining to be solved were summarized, and the prospects of ABO3/g-C3N4 for further advances in photocatalysis were also presented.
Key words: graphite phase carbon nitride; perovskite type oxide; composites; photocatalysis