Ag修饰TiO_2催化剂紫外光催化还原CO_2的研究  

Photocatalytic reduction of CO_2 with Ag modified TiO_2 under UV irradiation

作　　者：何志桥[1] 韩晶[1] 宋爽[1] 

机构地区：[1]浙江工业大学生物与环境工程学院,浙江杭州310032

出　　处：《浙江工业大学学报》2014年第1期20-26,共7页Journal of Zhejiang University of Technology

基　　金：国家自然科学基金资助项目(21177115)

摘　　要：采用水解煅烧法制备了不同Ag修饰量的TiO2催化剂(Ag-TiO2).利用X射线衍射(XRD)、X射线光电子光谱(XPS)、透射电子显微镜(TEM)、比表面积测试(BET)和紫外-可见漫反射光谱(UV-vis)等技术分别对纯TiO2和Ag-TiO2样品进行了分析表征.探讨了在紫外光照射的CO2/NaOH水溶液中Ag-TiO2光催化还原CO2反应.研究表明:Ag-TiO2的光利用能力和碳转化能力都较纯TiO2的高,当Ag修饰量为1.0%时达到最大值,其产物量的大小顺序依次为H2>CH4>CH3OH>CO>HCHO.Ag modified TiO2 （Ag-TiO2） catalysts with different contents of Ag were synthesized by means of a hydrolysis method followed by calcination at 450 ℃.The obtained samples were characterized by X-ray diffraction （XRD）,X-ray photoelectron spectroscopy （XPS）,BrunauerEmmett-Teller measurements （BET）,transmission electron microscopy （TEM） and UV-visible absorption spectra （UV-vis）.Photocatalytic reductions of CO2 were conducted under UV irradiation in a CO2/NaOH aqueous solution.The results indicated that Ag-TiO2 has the higher CO2-conversion ability and light-utilization ability than the pure TiO2,and optimal amount of Ag modification was determined to be 1.0％.The yields of the products using Ag-TiO2 followed the order H2＞ CH4＞ CH3OH ＞ CO ＞ HCHO.

关 键 词：Ag修饰TiO2 紫外光 光催化 CO2还原 

分 类 号：TQ426.6[化学工程]