摘要
为了提高光催化剂在光催化过程中的循环效率,减少催化剂损失及二次污染,以硫脲为硫源、硫酸铜为铜源,以N,N-二甲基甲酰胺和乙二醇为溶剂,采用两步溶剂热合成法制备了Cu_2O/CuS复合光催化膜.通过扫描电镜(SEM)观察所得膜材料的形貌,用X射线衍射、透射电子显微镜等手段对膜材料的组成进行表征,并且探讨了溶剂热反应的最佳实验条件.以甲基橙(MO)为有机污染物,通过紫外可见吸收光谱考察Cu_2O/CuS复合光催化膜的光催化降解性能、循环利用性能及膜强度.结果表明,所得的复合膜材料由Cu_2O/CuS颗粒组成且均匀牢固地覆盖在基底表面,甲基橙的光催化降解效率可达100%.经过3次循环催化反应,复合膜光催化剂的催化效率依然在99.5%以上,具有良好的循环稳定性,对复合膜进行膜强度测试,催化效率均保持在99%以上,说明Cu_2O/CuS复合光催化膜具有较高的机械强度.
High cycle efficiency,low consumption and few secondary pollution are the key factors for the photocatalyst. In this paper,we prepared a novel Cu2O/CuS composite photocatalytic membrane by a two-step solvothermal method. The morphology and phase of catalytic membrane were characterized by SEM,TEM and XRD. The results show that the composite membrane material is composed of the Cu2O/CuS particles,which are uniformly covered on the surface of the nickel foam substrate. Besides,the Cu2O/CuS membrane has the superior photocatalytic degradation performance and cycle stability for methyl orange（ MO）. The results of UV-Vis absorption spectroscopy exhibited that the photodegradation rate of composite membrane for MO can reach 100%,and above 99. 5% of catalytic efficiency is still observed after three cycles. Moreover,the catalytic efficiency of composite membrane remains above 99% during the test of mechanical strength,indicating that the Cu2O/CuS composite photocatalytic membrane has a high mechanical strength.
作者
赵金祥
赵永男
王祉建
ZHAO Jinxiang, ZHAO Yongnan, WANG Zhijian(School of Materials Science and Engineering, Tianjin Polytechnic University, Tianjin 300387, Chin)
出处
《河南工程学院学报（自然科学版）》
2018年第2期37-43,共7页
Journal of Henan University of Engineering：Natural Science Edition
基金
国家自然科学基金(21703152)
天津市自然科学基金(17JCQNJC06100)
关键词
两步溶剂热合成法
复合光催化膜
催化效率
循环稳定性
膜强度
two-stepsolvent heating method
compositephotocatalysisfilm
catalyticefficiency
cyclicstability
membrane strength
