【摘要】 采用微波辅助条件下的溶胶-凝胶法制备了煤渣负载纳米TiO₂光催化剂。X射线衍射仪、扫描电镜表征结果表明,所负载的TiO₂为锐钛矿型,平均粒径12nm。以亚甲基蓝为目标降解物,着重考察了不同煤渣含量、烧结温度、微波时间、微波功率对其催化性能影响结果表明,煤渣含量32.49%,微波时间为5min,微波功率为400 W,马沸炉温度为400℃时制备的催化剂,催化亚甲基蓝光TiO₂/煤渣复合材料降解效果最好。在搅拌条件下该催化剂催化的光降解反应符合一级动力学方程。更多还原

【Abstract】 This thesis focused on the preparation and application of the cinder-supported nanometer TiO₂ photocatalyst by sol-gel technique under the microwave-assisted conditions.The cinder-supported catalysts characterized by XRD and SEM were consisted of anatase titan TiO₂ with an average size of 12 nm.By taking methylene blue as the degradation targets,the effect of cinder content,sintering temperature,microwave time and microwave power on the photocatalytic performance of coal cinder-supported titanium dioxide composites was investigated.The results showed that when the percentage content of cinders,microwave-time,microwave-power,muffle furnace temperature were 32.49%,5min,400 W,400℃,respectively,the coal cinder-supported titanium dioxide composites showed the best effect of degradation on methylene blue.In addition,the dynamic response obeyed pseudo-first-order kinetics equation.更多还原