有机物结构诱导剂调控WO3晶体晶面的研究进展

太阳能半导体光催化技术由于其绿色无污染、可再生,有利于解决全球变暖问题等优点而受到国内外研究人员的广泛研究。由于半导体光催化剂的催化活性取决于其表面电子结构和原子结构,而这些结构又强烈地依赖于晶体层面,因此光催化剂的催化活性受到反应过程中暴露的晶面的显著影响。近年来,晶面调控工程已成为一种非常重要的半导体理化性质微调方法。三氧化钨(WO₃)半导体催化剂由于具有较好的光催化性能,常用作光电催化系统中的光阳极。本文针对目前国内外使用有机物(有机小分子及有机大分子)作为结构诱导剂对WO₃晶面调控的研究现状进行了综述,分析有机物对晶体晶面调控的规律和原理,寻找新的实验方向以及突破点,总结目前WO₃光电催化在实际生产生活中的应用,例如光电催化分解水、电致变色、气体传感器、有机污染物降解等,并对未来实验发展方向进行展望。

Research Progress of WO3 Crystal Facet Tuning by Organic Structure Inducers

Solar semiconductor photocatalysis technology has been widely studied by researchers all over the world because of its green pollution-free, renewable and beneficial solution to global warming. Since the catalytic activities of semiconductor photocatalysts depend on their surface electron structures and atomic structures, which are strongly dependent on the crystal face, the catalytic activities of photocatalysts are significantly affected by the crystal surface exposed in the reaction process. In recent years, crystal facet tuning engineering has become a very important method of fine-tuning the physical and chemical properties of semiconductors. Tungsten trioxide (WO₃) semiconductor catalyst is often used for photoanode in photoelectrochemical systems because of its good photocatalytic properties. In this paper, the recent progress of organic substances (organic small molecules and organic macromolecules) as structural inducers for the WO₃ crystal structure regulation is reviewed, the mechanism and principle of the regulation of organic substances on crystal surface are introduced, looking for new experimental direction and breakthrough points, summarizing the current applications of WO₃ photoelectrocatalysis in real life, such as solar water splitting, electrochromism, gas sensors, degradation of organic pollutants, etc. Finally, perspectives are given on the interesting research direction that may guide future studies.