TiO_2/SiO_2的制备及其对DDVP光催化性能的研究

STUDIES ON THE PREPARATION AND PHOTOCATALYTIC PROPERTIES OF TiO_2/SiO_2 PARTICLES

采用溶胶 -凝胶法制备了负载型光催化剂 Ti O2 Si O2 ,并用所制样品对有机磷农药 2 ,2 -二乙烯基二甲基磷酸酯 ( DDVP)进行光降解实验。用扫描电镜 ( SEM) ,红外光谱 ( IR)对所制样品进行了检测 ,讨论了制备条件 ,试剂用量等因素对 Ti O2 Si O2 制备及降解性能的影响。结果表明 :制备条件选用粒径为 180～ 2 5 0 μm的硅胶 ,浸渍时间 12 h,RH=90 %时所制样品的催化效果最好。

Surface compound TiO 2/SiO 2 was prepared by sol-gel process and was used to photocatalytically degrade DDVP. The morphology and surface states of TiO 2/SiO 2 samples were characterized by SEM and IR. The factors affecting preparation of TiO 2/SiO 2 and degradative properties, such as condition of preparation of reagent, were discussed. The best condition of preparation of TiO 2/SiO 2 was indicated. Here the optimal conditions for TiO 2/SiO 2 preparation were given out.