水热法制备TiO_2/g-C_3N_4及其光催化性能  

Hydrothermal Synthesis and Photocatalytic Performance of TiO_2/g-C_3N_4 Composite

作　　者：刘文杰[1,2] 袁华[1] 左士祥[1] 杜涛[1] 姚超[1] 孟祥远 

机构地区：[1]常州大学石油化工学院,江苏常州213164 [2]江苏省环境材料与环境工程重点实验室,江苏扬州225002 [3]浙江凯色丽科技发展有限公司,浙江湖州313200

出　　处：《材料科学与工程学报》2016年第6期912-917,936,共7页Journal of Materials Science and Engineering

基　　金：江苏省自然科学青年基金资助项目(K20130247);江苏省环境材料与环境工程重点实验室开放课题资助项目(K11032)

摘　　要：采用水热法合成了可见光响应的TiO_2/g-C_3N_4复合催化剂,通过X射线衍射(XRD)、氮气吸附-脱附(BET)法、透射电子显微镜(TEM)、紫外-可见漫反射(UV-vis DRS)、荧光光谱(PL)、X射线光电子能谱(XPS)对样品进行了表征。并以亚甲基蓝为降解对象,考察了在可见光条件下不同催化剂对亚甲基蓝的降解能力。研究结果表明,锐钛矿型二氧化钛均匀地负载在石墨相氮化碳片层上,TiO_2/g-C_3N_4复合材料的光吸收带边扩展到470nm,具有优异的可见光催化效率,它对亚甲基蓝的光催化降解率达到99.0%。TiO_2/g-C_3N_4 composite photocatalysts with visible-light response were synthesized by hydrothermal method at several temperatures.The composite samples were characterized by X-ray diffraction（XRD）,Nitrogen adsorption-stripping（BET）,Transmission electron microscopy（TEM）,UV-vis diffuse reflect spectroscopy（UV-vis DRS）,Photoluminescence spectra（PL）and X-ray photoelectron spectroscopy（XPS）.The photocatalytic performance of the TiO_2/g-C_3N_4 composites was evaluated by the degradation of methylene blue（MB）under the visible light.The results show that anatase titanium dioxide particles are loaded on the carbon nitride layer uniformly.The absorption ledge of the TiO_2/g-C_3N_4 photocatalyst expands to 470 nm,showing a remarkable red shift compared with TiO_2 and gC_3N_4.As a consequence the visible light catalytic efficiency of methylene blue is improved.The photocatalytic degradation rate reaches 99.0%in 60 min.

关 键 词：锐钛矿型二氧化钛 石墨相氮化碳 光催化 可见光响应 

分 类 号：TB34[一般工业技术—材料科学与工程]