铁掺杂二氧化钛光催化性能研究  

Study on Properties of Fe-TiO_2Photocatalysts

作　　者：王超 敬和民[1] Wang Chao;Jing Heming(School of materials science and Engineering,Anhui University of Technology,Anhui Maanshan 24300)

机构地区：[1]安徽工业大学材料科学与工程学院,安徽马鞍山243002

出　　处：《化工时刊》2018年第8期4-7,38,共5页Chemical Industry Times

摘　　要：通过溶胶-凝胶法室温制备了掺杂铁的二氧化钛光催化剂。采用X-射线衍射仪(XRD),电子扫描电镜(SEM),紫外-可见光谱仪(UV-Vis)等手段对Fe离子掺杂改性的TiO_2粉末表征分析,探究Fe离子对TiO_2催化剂降解有机污染物罗丹明B的催化改性。结果表明:掺杂后的TiO_2光催化剂晶粒尺寸变小,金红石相开始转变为锐钛矿相,团聚现象减弱,吸收光谱发生红移,Fe离子最佳掺杂量在1%(Fe/Ti物质的量比);光催化降解罗丹明B的实验结果:催化时间5 h时,纯TiO_2和1%Fe-TiO_2(Fe/Ti摩尔比)对罗丹明B的降解率分别为25.87%和71.23%,光催化效率提高45.36%;反应溶液最佳pH=9时,降解率为71.23%;罗丹明B的浓度越高,越不利于光催化反应的进行,最佳初始浓度为2.5 mg/L,降解率为93.06%。Fe-TiO2photocatalyst was prepared by sol-gel method,Using X-ray diffraction（XRD）,electron scanning electron microscope（SEM）,uv-vis spectrometer（UV-Vis）methods to characterize TiO2catalyst,and explore organic pollutants degradation of rhodamine B.The results showed that The results showed that with the increase of doping amount,the grain size of Fe-TiO2photocatalyst decreased,and the rutile phase began to transform the anatase phase,the optimal doping amount of Fe ion is 1%（Fe/Ti molar ratio）,and the iron doping ratio of FeTiO_2is best.The photocatalytic degradation experiment was carried out with rhodamine B as simulated degradation object.When the catalytic time was 5 h,the degradation rate of rhodamine B was 25.87%and 71.23%respectively with pure TiO 2and 1%（Fe/Ti mole ratio）;And the photocatalytic efficiency increased by 45.36%;The optimal p H was 9,the degradation rate was 71.23%;The initial concentration of rhodamine B was 2.5mg/L,the degradation rate was 93.06%.

关 键 词：光催化 二氧化钛 铁掺杂 溶胶凝胶法 光催化降解率 

分 类 号：O643.36[理学—物理化学]