盐酸后处理制备高效制氢光催化剂Zn2In2S5

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Zn_mIn₂S_m+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.

Preparation of Zn2In2S5 Photocatalyst by Post-treatment with Hydrochloric Acid for Effective Photocatalytic Hydrogen Evolution†

ZnIn₂S₄ solid solutions were prepared by hydrothermal method and a series of Zn_mIn₂S_m+3(m=1—5, integer) solid solutions were obtained by post-treatment of ZnIn₂S₄ 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 Zn₂In₂S₅ 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.