Cu,In-ZnSeS催化剂的制备及其光解水制氢性能的研究

采用化学共沉淀法制备了掺杂CuI、n的ZnSeS半导体光催化剂,并通过X射线粉末衍射、紫外-可见漫反射光谱和比表面积与孔径分析、X射线荧光光谱、热质量损失(热失重)分析对催化剂的结构进行了表征.在自制的反应装置上评价了催化剂的光分解水产氢性能.结果表明:在Cu,In-ZnSeS中掺杂CuI、n的摩尔分数为2%时其光吸收性能最好,最大吸收边红移至700 nm;紫外光照射下该催化剂光分解水产氢的量子效率达到4.83%;催化剂具有良好的热稳定性和光学稳定性,反应100 h其产氢性能没有衰减.

Synthesis of Copper-Indium Co-Doped Zinc Seleno-Sulphide Photocatalyst and Its Performance of Photocatalytic Hydrogen Production from Water

Copper-indium co-doped zinc seleno-sulphide semiconductor photocatalyst was synthesized by chemical co-precipitation. The compound was characterized by X-ray powder diffraction, ultraviolet visible diffuse reflectance spectrum,nitrogen sorption analysis,X-ray fluorescence analysis and thermogravimetric analysis. Its performance of photocatalytic hydrogen production from water was also studied. The results show that 2% copper-indium co-doped catalyst, whose edge of light absorption is red-shifted to 700 nm, has the best light absorption performance and the highest hydrogen evolution efficiency with a quantum yield of 4.83% under ultraviolet light irradiation. In addition, the photocatalyst is stable under ultraviolet light irradiation and the hydrogen evolution performance does not decrease after 100h photoreaction.