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

功能材料, 2010, 41(3): 545-548.

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

嵇天浩 ^1, , 田淼 ^2, , 杜海燕 ^3, , 孙家跃 ^4, , 葛广路 ^5,

1.北京工商大学,化学与环境工程学院,北京,100048

2.北京工商大学,化学与环境工程学院,北京,100048

3.北京工商大学,化学与环境工程学院,北京,100048

4.北京工商大学,化学与环境工程学院,北京,100048

5.国家纳米中心,北京,100080

基金项目: 国家自然科学基金(20876002) 科技部科研项目(2006CB932605)

关键词：水热合成 , 复合纳米线 , CdS纳米粒子 , ZnS纳米粒子 , TiO_2 , 纳米线

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

JI Tian-hao ^1, , TIAN Miao ^2, , DU Hai-yan ^3, , SUN Jia-yue ^4, , GE Guang-lu ^5,

1.北京工商大学,化学与环境工程学院,北京,100048

2.北京工商大学,化学与环境工程学院,北京,100048

3.北京工商大学,化学与环境工程学院,北京,100048

4.北京工商大学,化学与环境工程学院,北京,100048

5.国家纳米中心,北京,100080

Keywords：：hydrothermal synthesis , composite nanowires , CdS nanoparticles , ZnS nanoparticles , TiO2 nanowires ,

以具有层状结构的钛酸盐纳米线、CdCl_2或ZnSO_4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TiO_2纳米线复合材料.首先,CdCl_2或ZnSO_4与钛酸盐纳米线在水热条件下进行离子交换制得含Cd~(2+)或Zn~(2+)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Cd~(2+)或Zn~(2+)的钛酸盐纳米线就可获得负载有硫化物纳米粒子的TiO_2复合纳米线.它们在酸浸后,TiO_2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TiO_2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,CdCl_2 or ZnSO_4 and thioacetamide by two-step hydrothermal synthesis process.Titanate nanowires with Cd~(2+) or Zn~(2+) cations were first obtained using layered titanate nanowires and CdCl_2 or ZnSO_4 under the hydrothermal condition;then,the products were treated in the diluted thioacetamide solution at 160℃ to prepare CdS- or ZnS-supported TiO_2 nanowires.After they were immersed into diluted HCl solution,the CdS or ZnS nanoparticles on TiO_2 nanowires could still be observed.The visible-light photocatalytic measurement results for the acid-treated samples,pure TiO_2 nanowires and commercial P25 demonstrate that the photocatalysis of TiO2 nanowires with CdS is the highest.

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