铂掺杂有序纳米孔二氧化钛膜的制备及其室温传感性能研究

Fabrication and characterization of ordered nanopores films of Pt doped anatase for sensing at room temperature

通过一种后置热蒸法制备了具有高结晶度和高度有序Pt-TiO2纳米孔膜。通过HRTEM、FESEM、SAXRD、拉曼光谱和BET表征其纳米结构、结晶度、粒径和孔径分布。通过检测Pt-TiO2纳米孔膜的气敏特性表明,传感膜的掺杂量和孔结构有序性在对苯蒸气的响应灵敏性方面起着重要的作用。尤其在室温下4%Pt掺杂浓度的Pt-TiO2传感膜对苯的传感灵敏度是已知文献报道值的3倍。

Ordered Pt-TiO_2 nanopores films with high crystallinity and long-range periodicity were fabricated via apost-synthetic water vapour hydrothermal treatment.Their nanostructure,crystallinity,particle sizes and pore size distribution were examined by HRTEM,FESEM,SAXRD,Raman spectroscopy,and BET.The examination of the gas sensing property of the Pt-TiO_2 nanopores films showed that the doping level and structure ordering of the arrays play an important role in the sensitivity to vapour contents.In particular,the benzene response at room temperature of the Pt-TiO_2 sensing films with 4 at% Pt-doping level was found to be substantially improved up to three times higher than the reported values in literature.