【摘要】 TiO₂光催化技术是一种新型的环境治理技术,可以应用于污水处理、空气净化等领域。TiO₂具有无毒无害、价格经济、光催化效率高以及没有二次污染等优点,但催化效率不高,可以通过负载和掺杂能够有效的提高光催化剂的效率。以TBOT为钛源,碳化葡萄糖为碳源,精制硅藻土为载体,采用溶胶-凝胶法和原位碳化法制备了TiO₂-C@硅藻土复合光催化剂。实验结果表明最佳制备工艺为负载C量为20%,负载方法为先负载C后负载TiO₂,煅烧方法为隔绝空气煅烧,所制得复合光催化剂降解率为96.4%,回收并继续降解5次之后得到的复合光催化剂的降解率为86.3%。更多还原

【Abstract】 As a new type of environmental treatment technology, TiO₂ photocatalysis technology can be applied to sewage treatment, air purification and other fields. TiO₂ has the advantages of non-toxic, harmless, economical, high photocatalytic efficiency and no secondary pollution, but the catalytic efficiency is not high. The efficiency of the photocatalyst can be effectively improved by loading and doping. In this paper, using TBOT as the titanium source, carbonized glucose as the carbon source, and refined diatomite as the carrier, TiO₂-C@diatomite composite photocatalyst was prepared by the sol-gel method and the in-situ carbonization method. The experimental results show that the best preparation process was C loading of 20%, loading method was first loading C and then loading TiO₂, and calcination method was calcination in isolation of air. The degradation rate of the composite photocatalyst obtained was 96.4%. After recovered and continued to degrade 5 times, the degradation rate of the composite photocatalyst obtained was 86.3%.更多还原