电沉积法制备微纳米Cu2_O薄膜与催化降解亚甲基蓝研究

Preparation of micro/nano crystalline Cu_2O thin film via electrodeposition and photocatalytic degradation for methylene blue

以硫酸铜和NaOH为原料、乳酸为络合剂,通过电沉积法在导电玻璃片上成功制备了微纳米Cu2O薄膜。采用X射线衍射(XRD)、扫描电镜(SEM)、紫外-可见分光光度计对其Cu2O薄膜结构及形貌进行了表征。在碘钨灯照射下和外加H2O2环境下,采用光度分析法考察了Cu2O薄膜对亚甲基蓝的催化降解情况。结果表明:不同电沉积时间的Cu2O薄膜的降解效果均较好,且在碘钨灯照射下3h的降解率达到97%以上。

The micro/nano crystalline Cu2O was prepared successfully via electrodeposition using Cu- SO4 ·5H2O and NaOH as the starting materials and lactic acid as complexing agent. The structure and morphology of as--prepraed Cu2O were characterized by X--ray diffraction（XRD）and scanning e- lectron microscopy （SEM） and UV-- visible spectrophotometer. The photocatalytic degradation of methylene blue in Cu2O suspension with tungsten lamp irradiation and H2O2 is investigated. The results show that the rate of degradation is more than 97% after 3h with tungsten lamp irradiation, and the degradation effects Cu2O thin films using different electrodeposition time are better.