锐钛矿TiO_2薄膜的低温制备及其光催化性能研究

Study on Low Temperature Preparation and Photocatalytic Activities of Anatase TiO_2 Films

采用改进的溶胶凝胶法低温回流制备TiO2水溶胶，水溶胶烘干后进行XRD和红外表征。以生产聚对苯撑苯并双唑（PBO）纤维单体过程中产生的含有2-氯-，6-二硝基间苯二酚的废水为研究对象表征催化剂的光催化活性。结果表明：低温回流下制备的二氧化钛为锐钛矿二氧化钛。最佳工艺条件：沉降pH为8～9，回流温度为100℃，回流时间为6h时催化剂的光催化活性最好，酚的降解率高达97．7％。

Titanium dioxide sol was prepared by a modified sol-gel method refluxing at low temperature, the XRD, FTIR were used to analyse the structure of the prepared sol. The photocatalytic activities of the TiO2 films were investigated for the degradation of wastewater containing 2-chloro-4, 6-dinitroresorcinol from the produce of PBO fiber. The results indicate that Titanium dioxide prepared by refluxing at low temperature is anatase titanium dioxide, the optimum conditions for preparation of TiO2 are as follows： settlement pH value 8 - 9, reflux temperature 100 ;C , reflux time 6 h. Titanium dioxide film prepared under these conditions shows the best photocatalytic activity, the degradation rate of phenol reaches 97.7%.