可见光催化剂La/S-TiO_2/SBA-15的表征及其对2,4-二氯酚的降解  

Characterization of La/S-TiO_2/SBA-15Photocatalysts and the Photocatalytic Degradation of 2,4-Dichlorophenol

作　　者：陈希[1] 陶红[1] 宋晓峰[1] 施柳[1] 朱正[1] 

机构地区：[1]上海理工大学环境与建筑学院,上海200093

出　　处：《理化检验（化学分册）》2015年第7期959-965,共7页Physical Testing and Chemical Analysis(Part B:Chemical Analysis)

基　　金：上海"大学生创新创业训练计划"项目(201210252090)

摘　　要：采用溶胶凝胶法制备La-S-TiO2/SBA-15催化剂,并采用XRD、BET、UV-Vis和XPS对材料进行表征,在可见光下对2,4-二氯酚进行光催化降解。催化剂投加量为0.3g·L-1,光照时间为2h时,对50 mg·L-1的2,4-二氯酚的样品表现出最高的光催化活性,降解率达到50.09%,为P25的7.9倍。通过高效液相色谱,气相色谱-质谱法分析了2,4-二氯酚光催化降解的中间产物,并对其降解途径进行了简单分析。La and S co-doped TiO2 loading on mesoporous SBA-15 was synthesized by sol-gel method,and characterized by XRD,BET,UV-Vis and XPS.Its photocatalytic activity for degradation of 2,4-dichlorophenol under visible light was tested.With the catalyst dose of 0.3g·L^-1,the illumination time of 2hand initial concentration of the 2,4-dichlorophenol at 50 mg·L^-1,the sample of La-S-TiO2/SBA-15 showed the highest photocatalytic activity with the degradation rate of 50.09%,which was 7.9times of commercial titanium dioxide P25.The intermediates in photocatalytic degradation of 2,4-dichlorophenol were analyzed by GC-MS and HPLC,and the main degradation pathway was analyzed.

关 键 词：La-S-TiO2/SBA-15 2 4-二氯酚 光催化 可见光 

分 类 号：O657[理学—分析化学]