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采用连续离子吸附与反应法制备了PbS及或CdS量子点敏化的TiO2纳米管阵列(TNAs)光阳极。用X光衍射(XRD)、场发射扫描电镜(FE-SEM)、透射电子显微镜(TEM)、紫外可见光漫反射光谱(UV-VisDRS)等表征样品的相组成、微观结构和光吸收特性;用线性伏安扫描法和光电催化制氢表征样品的光电化学性能。结果表明,PbS和CdS量子点的共敏化显著提高了TiO2纳米管阵列的光电化学性能;相比于PbS/TNAs样品的峰值光能转换效率2.82%和产氢速率0.675mL·cm-2·h-1(-0.1VvsAg/AgCl),共敏化的PbS&CdS/TNAs样品的峰值光能转换效率可达5.91%、产氢速率达1.55mL·cm-2·h-1,分别提高了110%、130%。
PbS and / or CdS quantum dot sensitized TiO2 nanotube arrays (TNAs) photoanode were prepared by continuous ion adsorption and reaction. The phase composition, microstructure and optical absorption properties of the samples were characterized by X-ray diffraction (XRD), field emission scanning electron microscope (FE-SEM), transmission electron microscopy (TEM) and UV-VisDRS. Voltammetry Scanning and Photoelectrocatalytic Hydrogen Generation Characterize the Photoelectrochemical Performance of Samples. The results showed that the co-sensitization of PbS and CdS quantum dots significantly enhanced the photoelectrochemical performance of the TiO2 nanotube arrays. Compared with PbS / TNAs samples, the peak light energy conversion efficiency was 2.82% and the hydrogen production rate was 0.675mL · cm-2 · h-1 (-0.1VvsAg / AgCl), the peak light energy conversion efficiency of the co-sensitized PbS & CdS / TNAs samples was 5.91% and the hydrogen production rate was 1.55mL · cm-2 · h- , 130%.