WO_3/TiO_2纳米棒复合材料的制备及其光催化活性  

Preparation of WO_3/TiO_2 Nanorod Composites and Its Photocatalytic Activity

作　　者：刘阳[1] 王晟[1] 王騊[1] 许章炼[1] 陈文兴[1] 蒋杰[2] 韦坚红[2] 

机构地区：[1]浙江理工大学先进纺织材料与制备技术教育部重点实验室,浙江杭州310018 [2]杭州市化工研究院有限公司,浙江杭州310014

出　　处：《催化学报》2010年第4期485-489,共5页

基　　金：长江学者和创新团队发展计划(PCSIRT;IRT0654);国家自然科学基金(50802088);浙江省钱江人才计划(2008R10019);浙江省自然科学基金(Y-406285;Y-4080392);杭州市科研院所产业化基金(20080734N10);浙江理工大学科研启动基金(0601064-Y;0601293-Y)

摘　　要：以纳米TiO2(P25)为前驱体,采用水热-煅烧法制备了具有大比表面积和高紫外光催化活性的TiO2纳米棒(TiO2-NRs),并考察了热处理温度对其形貌、晶型、比表面积及光催化活性的影响.以400oC热处理制得的TiO2-NRs为载体,采用溶胶-凝胶法制得负载型WO3/TiO2-NRs复合光催化剂,并使用透射电镜、X射线衍射和X射线电子能谱等手段对其进行了表征.结果表明,WO3负载量为2%时,WO3/TiO2-NRs的光催化活性是P25的5倍.对1×10?5mol/L罗丹明B溶液的脱色反应结果表明,该催化剂具有高速染料脱色特性.同时对光催化机理进行了探讨.TiO2 nanorods （TiO2-NRs） with high specific surface area and excellent photoactivity were prepared by a hydrothermo-calcination method with TiO2 （P25） precursor. The effects of calcination temperature on the morphology, crystallization, specific surface area, and photocatalytic activity of TiO2-NRs were investigated. The TiO2-NRs sample calcined at 400 °C had the highest photocatalytic activity and was used as the support to deposit WO3 nanoparticles by a sol-gel method to prepare the supported composite photocatalyst （WO3/TiO2-NRs）. The photocatalyst samples were characterized by transmission electron microscopy, energy dispersive X-ray spectroscopy, and X-ray diffraction. The photocatalytic activity evaluation exhibited that the 2%WO3/TiO2-NRs sample had the highest activity, which was 5 times that of P25. The decolorization experiment for rhodamine B solution （1 × 10^5 mol/L） indicated its excellent decolorization performance. The reaction mechanism over the composite catalyst was discussed.

关 键 词：三氧化钨 二氧化钛 钨酸钠 罗丹明B 光催化 纳米棒 

分 类 号：O643.36[理学—物理化学]