采用原位沉积法制备了一系列CdS/SnO₂复合光催化材料,通过XRD、UV-Vis、XPS、SEM、TEM和I-t曲线对其结构和性能进行表征分析,并将其用于光催化还原Cr(Ⅵ)的研究。结果表明,CdS与SnO₂复合增强了单一半导体材料的可见光吸收能力及光催化活性;当m(CdS)∶m(SnO₂)为0.7时,CdS/SnO₂表现出最佳的光催化活性,光照10 min后光催化还原Cr(Ⅵ)接近100%;0.7CdS/SnO₂光催化剂循环使用5次后,其还原率仍为99%。将CdS与SnO₂复合增强了单一半导体材料的抗光腐蚀能力,从而提高了其稳定性。

A series of CdS/SnO₂ composite samples are prepared via in-situ deposition method,and characterized by using XRD,UV-Vis,XPS,SEM,TEM,and I-t curve.Subsequently,the prepared CdS/SnO₂ composite is employed for the photocatalytic reduction of Cr(Ⅵ).Results show that compared to individual semiconductor material,the compounding between SnO₂ and CdS enhances visible light absorption capacity and improves photocatalytic activity.CdS/SnO₂ composite with a CdS/SnO₂ mass ratio of 0.7 exhibits the optimal photocatalytic performance,over which the reduction rate of Cr(Ⅵ) approaches 100% within 10 min of illumination.Furthermore,the reduction rate of Cr(Ⅵ) over 0.7CdS/SnO₂ photocatalyst remains at 99% even after the catalyst has undergone five cycles of use.Importantly,this synergistic combination also imparts superior corrosion resistance to these single semiconductor materials while simultaneously enhancing their stability.

潘会(1986-),女,博士,讲师,主要从事无机材料、多相催化等研究,panhui86@163.com;徐宁宁(1980-),女,硕士,副教授,主要从事天然产物的提取及成分研究,通讯联系人,1412437274@qq.com。