g-C3N4/TiO2@Ag复合材料的制备及可见光催化性能研究  

Study on preparation and photocatalytic performance of g-C_3N_4/TiO_2@Ag under visible light

作　　者：常玥[1] 妥小军 移永杰 王俊林 查飞[1] CHANG Yue;TUO Xiao-jun;YI Yong-jie;WANG Jun-lin;ZHA Fei(Key Laboratory of Eco-Environment-Related Polymer Materials of Ministry of Education, Key Laboratory of Polymer Materials of Gansu Province, College of Chemistry and Chemical Engineering,Northwest Normal University,Lanzhou 730070,Gansu,China)

机构地区：[1]生态环境相关高分子材料教育部重点实验室,甘肃省高分子材料重点实验室,西北师范大学化学化工学院,甘肃兰州730070

出　　处：《西北师范大学学报（自然科学版）》2018年第2期63-69,共7页Journal of Northwest Normal University(Natural Science)

基　　金：国家自然科学基金资助项目(21161017)

摘　　要：以g-C_3N_4和表面沉积Ag的TiO_2微球为原料,超声混合制备了g-C_3N_4/TiO_2@Ag复合材料.采用FT-IR,XRD,XPS,SEM,DRS,UV-Vis和PL等表征手段对材料的结构、形貌及光学性能进行了表征,在可见光照射下测试了其对亚甲基蓝溶液(MB)的光催化活性.结果表明,该复合材料分离光生电子与空穴效率高,对MB的光降解率为97.4%,高于TiO_2@Ag(65.5%)和g-C_3N_4/TiO_2(89.7%)的降解率.The composite materials(g-C 3N 4/TiO 2@Ag)are prepared with g-C 3N 4 and Ag particles on the surface of TiO 2 microspheres as material using ultrasonic mixing.The materials are characterized by FT-IR,XRD,XPS,SEM,DRS,UV-Vis and PL.The photocatalytic activities of g-C 3N 4/TiO 2@Ag are tested by photocatalytic degradation of methylene blue(MB)solution under visible light.It is found that degradation rate of MB is 97.3%by g-C 3N 4/TiO 2@Ag and more efficiently than TiO 2@Ag(65.6%)and g-C 3N 4/TiO 2(89.7%).It may be due to the existence of high photogenerated e--h+pairs charge separation.

关 键 词：g-C3N4 TiO2@Ag 复合材料 可见光 光催化活性 亚甲基蓝 

分 类 号：O643.36[理学—物理化学] TQ340.64[理学—化学]