Mn掺杂Cu2O微粒的制备及其光催化性能研究  

Preparation of manganese doped cuprous oxide and its photocatalytic activity

作　　者：刘宗斌 余晓皎[1] 张健[1] 余中[1] 刘广钧[1] 赵宁宁[1] 姚秉华[1] LIU Zong-bin;YU Xiao-jiao;ZHANG Jian;YU Zhong;LIU Guang-jun;ZHAO Ning-ning;YAO Bing-hua(School of Sciences,Xi’an University of Technology,Xi’an 710048,China)

机构地区：[1]西安理工大学理学院,陕西西安710048

出　　处：《应用化工》2020年第7期1618-1622,共5页Applied Chemical Industry

基　　金：国家自然科学基金面上项目(21978232,21576220);陕西省自然科学基金重点项目(2015JZ005);陕西省重点实验室项目(17JS085);陕西省教育厅自然科学基金项目(19JK0595)。

摘　　要：以乙酸铜和乙酸锰为原料,通过超声辅助水热法制备了Mn掺杂Cu2O微粒,并对其结构和光电性能进行了表征与分析。以次甲基蓝为目标降解物,对样品的光催化性能进行了评价。结果表明,所制备的Cu2O呈八面体形貌,具有(111)晶面择优取向,Mn掺杂Cu2O形貌呈凹陷八面体,与纯Cu2O相比,Mn掺杂Cu2O微粒的粒径减小,比表面增大,在可见光范围内吸收强度和禁带宽度均增大,光电流增强,表面电阻显著降低,光生电子-空穴的分离效率得到有效提高。光催化活性得到了显著提高,次甲基蓝的降解率可达91.6%。Copper acetate and manganese acetate were used as raw materials,and Mn-doped Cu2O particles were prepared by ultrasonic-assisted hydrothermal method.The structure and photoelectric properties were characterized and analyzed.The photocatalytic performance of the prepared samples was evaluated with methine blue as the target degradation product.The results showed that the prepared Cu2O has an octahedral morphology,has a(111)crystal plane preferential orientation,and the Mn-doped Cu2O morphology is a concave octahedron.Compared with pure Cu2O,the absorption intensity and forbidden band width of Mn-doped Cu2O are increased in the visible light range,the photocurrent is enhanced,the surface resistance is significantly reduced,and the efficiency of photo-generated electron-hole separation is effectively improved.The photocatalytic activity of Mn-doped Cu2O was significantly improved,and the degradation rate of methine blue was 91.6%.

关 键 词：氧化亚铜 掺杂 水热法 光催化剂 

分 类 号：TQ110.3[化学工程—无机化工] TQ110.9