CdS/TiO2复合纳米粒子的制备及其产氢性能研究

Preparation and Hydrogen Evolution Performance of CdS/TiO2 Composite Nanoparticles

摘要:

采用化学沉淀法制备了CdS包覆TiO2（CdS/TiO2）复合纳米粒子，利用XRD、TEM、SEM、UV-vis吸收光谱等对其进行了表征分析，并以可见光分解水制氢为探针反应考察了复合纳米粒子的活性。结果表明，CdS/TiO2 复合纳米粒子的颗粒大小约为40nm，TiO2 以锐钛矿型存在，CdS以六方相存在；复合纳米粒子的吸收光谱较TiO2 发生“红移”，大幅拓宽了对可见光区的吸收范围。光解水制氢实验表明，CdS/TiO2 复合纳米粒子具有良好的可见光释氢活性和光学稳定性。

Abstract:

TiO2 coated with CdS (CdS/TiO2) composite nanoparticles were prepared by chemical precipitation method. They were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM) and UV-vis diffuse reflection absorption spectra. The activity of sample was explored with photocatalytic hydrogen evolution under visible light irradiation as a probe reaction. The results showed that the particle size of composite nanoparticles was about 40nm. TiO2 and CdS in the composites could be indexed to an anatase phase and hexagonal crystal, respectively. The absorption edge of composites showed an obvious red-shift and absorption peak was appeared in the visible light region. The experimental of photocatalytic hydrogen generation showed that the composites had high activity of hydrogen generation and stability.