盐酸后处理制备高效制氢光催化剂Zn2In2S5

Preparation of Zn 2In 2S 5 Photocatalyst by Post-treatment with Hydrochloric Acid for Effective Photocatalytic Hydrogen Evolution

采用水热法制备了ZnIn2S4固溶体,并通过用盐酸对其进行后处理获得了系列ZnmIn2Sm+3(m≥2,整数)固溶体.通过X射线衍射(XRD)、扫描电子显微镜(SEM)、透射电子显微镜(TEM)、X射线光电子能谱(XPS)、紫外-可见漫反射光谱(UV-Vis DRS)、荧光光谱(PL)和电化学测试对催化剂的组成、结构和性能进行了表征.研究了系列固溶体可见光光催化制氢活性.结果表明,ZnIn2S4固溶体经0.5 mol/L HCl处理后能转化为Zn2In2S5固溶体,其制氢活性为ZnIn2S4固溶体的2.2倍,并且具有良好的稳定性.

ZnIn2S4 solid solutions were prepared by hydrothermal method and a series of ZnmIn2Sm+3( m =1-5,integer) solid solutions were obtained by post-treatment of Zn In2S4 with HCl. The composition,structure and performance of the catalysts were characterized by X-ray diffraction( XRD),scanning electron microscopy( SEM),transmission electron microscopy( TEM),X-ray photoelectron spectroscopy( XPS),UV-Visible diffuse reflective spectroscopy( UV-Vis DRS),photoluminescence( PL) spectroscopy and electrochemical tests. The visible light photocatalytic hydrogen production activity of a series of solid solutions was studied. It is found that ZnIn2S4 solid solution can be converted into Zn2In2S4 solid solution after treatment with 0. 5 mol/L HCl,and its hydrogen production activity is the highest,which is 2. 2 times that of ZnIn2S4 solid solution. The catalyst also has good stability.