立方体Cu2O-Cu7S4异质结构材料的制备及催化性能研究  

Fabrication of cubic cuprous oxide-copper tetrasulfide heterostructure photocatalyst and the investigation of its catalytic degradation performance

作　　者：李璐[1] LI Lu(Department of Biology and Architecture Engineering,Baoji Vocational Technology College,Baoji 721013,China)

机构地区：[1]宝鸡职业技术学院生物与建筑工程学院

出　　处：《化学工程师》2019年第11期12-15,共4页Chemical Engineer

基　　金：陕西省教育厅专项科研计划项目(19JK0048)

摘　　要：采用水热法制备了具有立方体结构的氧化亚铜(Cu2O),利用Cu2O与硫化钠(Na2S)的氧化还原反应,在Cu2O的{100}晶面上得到四硫化七铜(Cu7S4)纳米片,获得Cu2O-Cu7S4异质结构材料,同时深入研究了前驱体Na2S量对Cu2O-Cu7S4结构和性能的影响,进一步通过XRD、SEM和甲基橙的光催化降解实验对所得材料进行分析表征。研究结果表明:在立方体Cu2O晶面上成功负载上了均匀分布的Cu7S4纳米片,与立方体Cu2O相比,Cu2O-Cu7S4异质结构材料对甲基橙的催化性能随前驱体Na2S量的增加而逐步提高,但增大至一定程度时,催化降解速率趋于稳定。Cubic cuprous oxide(Cu2O)was prepared by hydrothermal method,then copper tetrasulfide(Cu7S4)nanosheets were prepared and loaded on its lattice plane by redox reaction of Cu2O and sodium sulfide(Na2S)to obtain Cu2O-Cu7S4 heterostructural photocatalyst.Moreover,the effect of the amount of Cu7S4 precusor(Na2S)on its structure and performance were investigated.Subsequently,the properties of the above materials were characterized by X-ray Diffraction(XRD),Scanning Electron Microscope(SEM)and catalytic degradation experiment of methyl orange.The results revealed that the obtained Cu7S4 nanosheets loaded and distributed homogeneously on the{100}lattice plane of Cu2O.It was also found that the catalytic degradation performance of Cu2O-Cu7S4 heterostructural materials enhanced step by step as the increase of the amount of Na2S gradually.While its catalytic degradation rate tends to a stable value after the amount of Na2S exceeds a certain extent.

关 键 词：氧化亚铜 四硫化七铜纳米片 异质结构 催化降解性能 

分 类 号：O643[理学—物理化学]