MS(M=Cd或Zn)纳米粒子负载TiO_2纳米线的制备及可见光催化性能  

Preparation and visible-light photocatalysis of MS(M=Cd or Zn) nanoparticle-supported TiO_2 nanowires

作　　者：嵇天浩[1] 田淼[1] 杜海燕[1] 孙家跃[1] 葛广路 

机构地区：[1]北京工商大学化学与环境工程学院,北京100048 [2]国家纳米中心,北京100080

出　　处：《功能材料》2010年第3期545-548,共4页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(20876002);国家重点基础研究发展计划(973计划)资助项目(2006CB932605)

摘　　要：以具有层状结构的钛酸盐纳米线、CdCl2或ZnSO4及硫代乙酰胺为原料,采用两步水热合成法制备了高温稳定的六方相CdS或低温稳定的立方相ZnS纳米粒子负载的TiO2纳米线复合材料。首先,CdCl2或ZnSO4与钛酸盐纳米线在水热条件下进行离子交换制得含Cd2+或Zn2+的钛酸盐纳米线;然后,在硫代乙酰胺溶液中于160℃下直接处理含Cd2+或Zn2+的钛酸盐纳米线就可获得负载有硫化物纳米粒子的TiO2复合纳米线。它们在酸浸后,TiO2纳米线的表面仍存在少量硫化物纳米粒子。通过测试酸浸后样品、纯TiO2纳米线和商用P25对亚甲基蓝水溶液的可见光催化降解实验结果证实,含CdS纳米粒子样品的光催化活性最高。High-temperature-stable hexagonal CdS or low-temperature-stable cube ZnS nanoparticles supported anatase TiO2 nanowires were prepared using the precursors layered titanate nanowires,CdCl2 or ZnSO4 and thioacetamide by two-step hydrothermal synthesis process.Titanate nanowires with Cd2＋ or Zn2＋ cations were first obtained using layered titanate nanowires and CdCl2 or ZnSO4 under the hydrothermal condition;then,the products were treated in the diluted thioacetamide solution at 160℃ to prepare CdS-or ZnS-supported TiO2 nanowires.After they were immersed into diluted HCl solution,the CdS or ZnS nanoparticles on TiO2 nanowires could still be observed.The visible-light photocatalytic measurement results for the acid-treated samples,pure TiO2 nanowires and commercial P25 demonstrate that the photocatalysis of TiO2 nanowires with CdS is the highest.

关 键 词：水热合成 复合纳米线 CDS纳米粒子 ZNS纳米粒子 TiO2纳米线 

分 类 号：TB381[一般工业技术—材料科学与工程]