纳米Ag-TiO_2复合光催化粉剂的制备及表征  

Preparation and characterization of Ag-TiO_2 Nano-powders photocatalyst

作　　者：焦飞[1] 李贵安[1] 邓仲勋[1] 张亚娟[1] 

机构地区：[1]陕西师范大学物理学与信息技术学院,陕西西安710062

出　　处：《陕西师范大学学报（自然科学版）》2010年第2期35-38,共4页Journal of Shaanxi Normal University：Natural Science Edition

基　　金：国家自然科学基金资助项目(60678005);陕西省自然科学基础研究计划资助项目(2006F39)

摘　　要：采用溶胶-凝胶法,以钛酸丁酯为前驱体,硝酸银为银源,加入控制水解的鳌合剂醋酸,制备了纯纳米二氧化钛粉末及掺银量不同的银-二氧化钛复合纳米粉末.利用透射电子显微镜(Transmission Electron Microscope,TEM)、X射线(X-ray diffraction,XRD)和紫外与可见光近红外分析仪(Ultraviolet Visible near Infrared,UV-Vis-NIR)对样品进行表征.结果表明,Ag的平均粒径为15 nm左右,Ag颗粒较均匀分布在Ti O2二次聚结基质上;焙烧温度以及银的掺入影响二氧化钛的晶型转变和粒径大小;银的掺入提高了样品的光利用效率.The pure and Ag-doped TiO2 nanoparticle powders are prepared by the sol-gel process using Ti（OC4H9）4 and silver nitrate as precursors and acetic acid as the mixture to control hydrolysis,respectively.The TiO2 and Ag-TiO2 photocatalyst are characterized by X-ray diffraction（XRD）,transmission electron microscope（TEM）,and ultraviolet visible near infrared（UV-Vis-NIR）.The results indicate that the average size of silver particles is 15 nm and silver nanoparticles are homogenously distributed on the coalescence of secondary TiO2 matrix.The changes of the crystalline phase of titanium dioxide are impacted by the calcination temperature and the incorporation of silver.The utilization efficiency of light is increased by the incorporation of silver.

关 键 词：二氧化钛 银掺杂 溶胶-凝胶法 光催化剂 

分 类 号：O433.54[机械工程—光学工程]