Fe2TiO5/C空心球光催化剂的可见光光催化和重复利用性能研究  

Visible-light Photocatalytic Performance and Reusability of Fe2TiO5/C Hollow Spherical Photocatalyst

作　　者：赵迁迁 江峰 尹丽 蓝善芳 陈俊华 冯果 刘梦婷 胡庆 刘健敏 江伟辉 ZHAO Qianqian;JIANG Feng;YIN Li;LAN Shanfang;CHEN Junhua;FENG Guo;LIU Mengting;HU Qing;LIU Jianmin;JIANG Weihui(School of Material Science and Engineering,Jingdezhen Ceramic Institute,Jingdezhen 333403,Jiangxi,China;National Engineering Research Center for Domestic and Building Ceramics,Jingdezhen 333001,Jiangxi,China)

机构地区：[1]景德镇陶瓷大学材料科学与工程学院,江西景德镇333403 [2]国家日用及建筑陶瓷工程技术研究中心,江西景德镇333001

出　　处：《陶瓷学报》2020年第6期945-953,共9页Journal of Ceramics

基　　金：国家自然科学基金(51662016,51962014,52072162);江西省重点研究计划项目(20192BBEL50022);江西省青年基金重点项目(20202ACBL241006,20202ACBL214008);江西省研究生创新专项资金项目(YC2019-S377)。

摘　　要：利用含碳前驱体(Fe(OC2H5)3,Ti(OC4H9)4)作为原位碳源,通过非水解溶胶-凝胶(NHSG)方法制备Fe2TiO5/C空心球。利用FE-SEM,TEM,EDS以及XPS测试样品的微观结构及化学组成,在可见光下降解染料,并通过UV-Vis测试其光催化活性及重复利用性,利用EDS、XPS及FT-IR测试样品的稳定性。与P25相比,Fe2TiO5/C光催化剂展示了较高的光催化降解效率。具有高导电性的C均匀分布在样品内且以界面碳的形式存在,促进了光生电子-空穴的分离,避免晶格畸变引起的电子-空穴复合。同时,Fe2TiO5/C空心球的表面氧空位和Fe^2+/Fe^3+形成动态氧化还原循环促进了光生载流子的迁移,也提高了其光催化性能。Fe2TiO5/C空心球也显示出较好的可重复使用性,经过十次降解循环后,其光催化性能没有明显的下降,回收后样品的表面组成,元素价态,官能团和化学键保持不变,确保了Fe2TiO5/C空心球具有优异的重复利用性能,表明该材料具有广阔的应用前景。Fe2TiO5/C hollow spheres were prepared by using a nonhydrolytic sol-gel(NHSG)method,with carbon-containing precursors(Fe(OC2H5)3,Ti(OC4H9)4)as in-situ C source.Microstructure and chemical composition of the samples were characterized by using FE-SEM,TEM,EDS and XPS analysis techniques.Photocatalytic activity and reusability of the samples for degradation of dyes under visible light and UV-Vis were characterized.EDS,XPS and FT-IR measurements were used to examine the stability of the samples.Compared with P25,our Fe2TiO5/C photocatalyst exhibits much higher photocatalytic efficiency.carbon with high conductivity is evenly distributed in the samples and present in the form of interface carbon,which promotes the separation of photogenerated electrons and holes and prevents the electron-hole recombination caused by lattice distortion.Surface oxygen vacancies and Fe2+/Fe3+pares in the Fe2TiO5/C hollow spheresthat form a dynamic redox cycle promote the migration of the photogenerated carriers,which has also a positive effect on the photocatalytic performance.The Fe2TiO5/C hollow spheres show excellent reusability as well.After ten cycles of degradation,the photocatalytic performance exhibits no obvious deterioration.The unchanged surface composition,chemical states,functional groups and chemical bonds after recycling ensure the excellent reusability of the Fe2TiO5/C hollow spheres,showing a bright prospect for practical applications.

关 键 词：Fe2TiO5/C 非水解溶胶-凝胶法 可见光光催化 回收再利用 

分 类 号：TQ174.75[化学工程—陶瓷工业]