摘要
采用酞酸丁酯、氢氟酸、无水乙醇、钨酸钠和十六烷基三甲基溴化铵为原料,通过水热法制备了WO_3/TiOF_2复合光催化剂,用X-射线衍射(XRD)、扫描电子显微镜(SEM)、透射电子显微镜(TEM)、固体紫外漫反射(UV-vis DRS)、荧光光谱(PL)等分析手段对WO_3/TiOF_2复合催化剂进行了表征;利用罗丹明B的脱色降解研究了WO_3/TiOF_2复合催化剂的光催化性能;通过罗丹明B溶液的紫外可见吸收光谱(UV-Vis)变化研究了催化剂作用下罗丹明B的脱色机理。在加入0.1 g复合催化剂和模拟太阳光源照射下,初始质量浓度为10 mg/L的罗丹明B溶液在2.5 h内降解了95.8%,光催化的性能优异,说明制备的WO_3/TiOF_2复合光催化剂有良好的太阳光催化应用前景。
WO3/TiOF2 composite photocatalysts have been prepared by a hydrothermal route using butyl titanate, hydrofluoric acid, absolute ethanol, sodium tungstate and cetyltrimethylammonium bromide as raw materials. The structures of the composite photocatalysts were characterized by XRD, SEM, TEM, UV-Vis and PL techniques. The photocatalytic performance of the TiOF2/WO3 composite catalyst was investigated using the decolorization and degradation of rhodamine B as a probe reaction. The mechanism of decolorization of rhodamine B was investigated by monitoring its UV-Vis absorption spectrum. The results showed that doping with WO3 affects the crystal morphology of TiOF2 and increases its specific surface area. It thus provides a contact point and space for the degradation of rhodamine B at different levels, and reduces the band gap and the recombination probability of the electron holes. As a result, the photocatalytic activity is enhanced. When a composite catalyst(0.1 g) was dispersed in a rhodamine B solution with an initial concentration of 10 mg/L under solar light irradiation, the degradation of rhodamine B reached 96% after 2.5 h, confirming the excellent performance of the composite catalyst. This work shows that the TiOF2/WO3 composite photocatalyst has good prospects for application in solar photocatalysis.
作者
侯晨涛
宋乔乔
HOU ChenTao;SONG QiaoQiao(College of Geology and Environment,Xi’an University of Science and Technology,Xi’an 710054,China)
出处
《北京化工大学学报（自然科学版）》
CAS
CSCD
北大核心
2019年第1期56-62,共7页
Journal of Beijing University of Chemical Technology(Natural Science Edition)
基金
陕西省工业攻关项目(2014GY2-07)
陕西省教育厅项目(15JK1460)
