污染物为电子给体Cd_(0.5)Zn_(0.5)S固溶体光催化分解水制氢

Photocatalytic hydrogen evolution from water splitting using pollutants as electron donors over Cd_(0.5)Zn_(0.5)S solid solution

采用水热法制备了Cd_(0.5)Zn_(0.5)S光催化剂,并通过XRD和UV-vis漫反射光谱进行了表征。研究了污染物甲醛、甲醇、甘油和葡萄糖为给电子体,在Cd_(0.5)Zn_(0.5)S上的可见光光催化制氢及污染物的降解性能。结果表明:污染物的存在能提高光催化分解水制氢活性。在甲醛、甲醇、甘油和葡萄糖电子给体中,甲醛是最好的电子给体。甲醛能显著提高光催化制氢性能,同时自身得到很好的降解。

Cd0.5Zn0.5S photocatalyst was prepared by a hydrothermal method,and characterized by X-ray dif- fraction, UV-Vis diffuse reflectance spectrum. Using pollutants formaldehyde, methanol, glycerol and glu- cose as electron donors, the photocatalytic activity of hydrogen evolution and the decomposition of pollu- tants over Cd0.5Zn0.5S under visible light irradiation were investigated. The results show that the presence of pollutants can improve photocatalytic hydrogen evolution. Formaldehyde was found to be the most effi- cient electron donor among methanol, glycerol and glucose. Formaldehyde can significantly improve the per- formance of photocatalytic hydrogen evolution with its simultaneous degradation.