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碳化硅(SiC)具有较好的导热性,较强的抗氧化性及很高的机械强度,作为新型催化剂载体在强放热、高腐蚀性、液相催化等反应中有很好的应用前景,近年来受到广泛关注。目前关于SiC载体的研究主要集中在三个方面:(1)高比表面积多孔SiC材料的制备;(2)基于现有商业化低比表面积SiC材料的表面碳化;(3)对SiC载体进行杂原子掺杂等表面功能化。本文中,我们主要对以上三个方面的研究现状做简要综述。重点介绍SiC的结构与物理化学性质,SiC作为新型载体在非均相催化反应中的应用以及基于6H-SiC(0001)衬底的表面化学研究。
Silicon carbide (SiC) has good thermal conductivity, strong oxidation resistance and high mechanical strength. As a new type of catalyst carrier, it has a good application prospect in reactions of strong exothermicity, high corrosiveness and liquid phase catalysis In recent years, it has received wide attention. At present, the research on SiC carriers mainly focuses on three aspects: (1) preparation of porous SiC materials with high specific surface area; (2) surface carbonization based on existing commercial low specific surface area SiC materials; (3) Atomic doping and other functional surface. In this article, we mainly make a brief summary of the research status of the above three aspects. The structure and physico-chemical properties of SiC are emphasized. The application of SiC as a new type of support in heterogeneous catalysis and the surface chemistry based on 6H-SiC (0001) substrate are reviewed.