引用本文:
颜秀茹, 宋宽秀, 霍明亮, 李晓红, 王建萍, 尹新旺. TiO2/SiO2的制备及其光催化降解敌敌畏[J]. 应用化学,
1999, 16(4): 94-96.
Citation: Yan Xiuru, Song Kuanxiu, Huo Mingliang, Li Xiaohong, Wang Jianping, Yin Xinwang. Preparation of TiO2/SiO2 and Photocatalytic Degradation of Dichlorvos on It[J]. Chinese Journal of Applied Chemistry, 1999, 16(4): 94-96.
Citation: Yan Xiuru, Song Kuanxiu, Huo Mingliang, Li Xiaohong, Wang Jianping, Yin Xinwang. Preparation of TiO2/SiO2 and Photocatalytic Degradation of Dichlorvos on It[J]. Chinese Journal of Applied Chemistry, 1999, 16(4): 94-96.
TiO2/SiO2的制备及其光催化降解敌敌畏
摘要:
近年来人们注意到半导体多相光催化法能有效地降解水中有机污染物.由于TiO2既有较高的光催化活性,又抗光腐蚀,而且还具有便宜、易得,在酸碱条件下难溶,对光稳定、无毒等特点,因此TiO2已成为一种重要的、有应用前景的污水处理光催化剂[1].目前国内对光催化剂的研究仍以TiO2粉末悬浮相为主[2],但其易聚集,回收和再利用比较困难,限制了TiO2的应用发展[3],克服这一缺点的有效办法是制备负载型光催化剂.近期虽有应用TiO2薄层的报道,但起始材料仍限于TiO2粉末.本文采用溶胶-凝胶法,选用硅胶为基质,制得了催化活性较高的TiO2/SiO2负载型光催化剂,并初步考察了制备条件对TiO2/SiO2光催化降解敌敌畏(DDVP)性能的影响.
English
Preparation of TiO2/SiO2 and Photocatalytic Degradation of Dichlorvos on It
Abstract:
The TiO2/SiO2 coating particles have been prepared by a sol-gel method with Ti(OC4H9)4 and SiO2 as precursors. The IR results indicate the existence of Si-O-Ti bonds on the catalyst. The crystalline phase of coating thin films(TiO2) was studied by XRD. The amount of TiO2 bound to the SiO2 was determined by spectrophotometry. The TiO2/SiO2 can be used repeatedly and shows a higher photocatalytic decomposition rate for dichlorvos than TiO2.
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Key words:
- dichlorvos
- / photocatalytic degradation
- / titanium dioxide
- / so-gel method
- / surface coating
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