蠕虫状碳化硅的合成及光解水制氢性能

Preparation and photocatalytic performance for hydrogen evolution of vermiculate SiC

以酚醛树脂和工业水玻璃为碳源和硅源,通过碳热还原合成了蠕虫状的碳化硅,并对其进行了X射线衍射、BET表面积、扫描电镜、透射电镜和紫外可见漫反射的表征,考察了所制碳化硅样品在可见光照射下光催化分解水产氢的活性。结果表明,蠕虫状碳化硅在可见光区有较强的吸收,在可见光照下能有效稳定地分解纯水产氢,光照10h的平均产氢速率为88μL/(h.g)。

Vermiculate silicon carbide （SIC） was prepared by carbothermal reduction method, in which phenolic resin and low-cost water glass were respectively employed as carbon and silica precursors. The as-synthesized SiC was characterized by XRD, BET, SEM, TEM and UV-Vis diffusion reflectance. The photocatalytic activity for water splitting was investigated under visible light irradiation. The results show that the vermiculate SiC has a strong absorption in the visible region and exhibits highly stable and efficient photocatalytic hydrogen evolution from pure water under visible light irradiation. The average hydrogen production rate is up to 88μL/g·h after 10h irradiation.