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

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.