H_(3+x)PW_(12-x)V_xO_(40)/TiO_2/膨胀石墨的制备及其光催化活性  

Preparation and Photocatalytic Activity of H_(3+x)PW_(12-x)V_xO_(40)/TiO_2/EG

作　　者：占昌朝[1,2] 曹小华 严平[1,2] 叶志刚 徐冰洁[1,2] 杨涛 ZHAN Changchao;CAO Xiaohua;YAN Ping;YE Zhigang;XU Bingjie;YANG Tao(College of Chemistry and Environmental Engineering, Jiujiang University Jiujiang, Jiartgxi 332005)

机构地区：[1]九江学院化学与环境工程学院,江西九江332005 [2]江西省生态化工工程技术中心,江西九江332005

出　　处：《工业安全与环保》2018年第4期65-68,73,共5页Industrial Safety and Environmental Protection

基　　金：国家自然科学基金(51562016;21566013);江西省自然科学基金(20151BAB213018;20142BAB203019);江西省教育厅科技基金(GJJ13723)

摘　　要：以钛酸四丁酯和鳞片石墨为主要起始原料,经溶胶凝胶-浸渍法制备了膨胀石墨(EG)负载H_(3+x)PW_(12-x)V_xO_(40)/TiO_2(x=0~4)复合光催化剂,采用SEM,EDS,XRD,FT-IR,UV-Vis进行表征。以紫外、可见光催化降解甲基橙废水评价其光催化活性。结果表明,与H_(3+x)PW_(12-x)V_xO_(40)/TiO_2/EG(x=0,1,3,4)相比,H_5PW_(10)V_2O_(40)/TiO_2/EG因其结构中H_5PW_(10)V_2O_(40)的存在,光生电子-空穴分离速率加快,量子效率提高,光催化活性明显增强。此外,催化剂循环使用4次后,依然保持了较高的活性。Tetrabutyl titanate and graphite as main starting materials,H_（3＋x）PW_（12-x）V_xO_（40）/TiO_2/EG（x = 0-4） composite photocatalysts were prepared by sol-gel and impregnation method and characterized by SEM,EDS,XRD,FT-IR,and UV-Vis. The photocatalytic activity of composite photocatalysts were evaluated by photo-degradation of methyl orange wastewater under ultraviolet and visible light irradiation. The experiment results showed that H_5PW_（10）V_2O_（40）/TiO_2/EG exhibited higher activity for photo-degradation of methyl orange than TiO_2/EG without modification and modification with other vanadium substituted Keggin type phosphotungstic acids. The photo-catalytic activity was promoted significantly due to acceleration of photo-generated electron-hole pairs separation rate and enhancement of photocatalytic quantum efficiency,which originated from H_5PW_（10）V_2O_（40）. Besides,H_5PW_（10）V_2O_（40）/TiO_2/EG photocatalyst retained its high catalytic activity after 4 consecutive recycles.

关 键 词：H5PW10V2O40/TiO2/EG 光催化降解 甲基橙 

分 类 号：O643.36[理学—物理化学]