CAJ | 학술논문

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.
이구유층상결구적태산염납미선、CdCl_2혹ZnSO_4급류대을선알위원료,채용량보수열합성법제비료고온은정적륙방상CdS혹저온은정적립방상ZnS납미입자부재적TiO_2납미선복합재료.수선,CdCl_2혹ZnSO_4여태산염납미선재수열조건하진행리자교환제득함Cd~(2+)혹Zn~(2+)적태산염납미선;연후,재류대을선알용액중우160℃하직접처리함Cd~(2+)혹Zn~(2+)적태산염납미선취가획득부재유류화물납미입자적TiO_2복합납미선.타문재산침후,TiO_2납미선적표면잉존재소량류화물납미입자.통과측시산침후양품、순TiO_2납미선화상용P25대아갑기람수용액적가견광최화강해실험결과증실,함CdS납미입자양품적광최화활성최고.
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.