ZnO薄膜光电催化降解乙酰甲胺磷  

Photoelectrocatalytic degradation of acephate on ZnO thin-film electrode

作　　者：胡友娇[1] 杨冬梅[1] 杨昌柱[1] 濮文虹[1] 张敬东[2] 

机构地区：[1]华中科技大学环境科学与工程学院,武汉430074 [2]华中科技大学化学与化工学院,武汉430074

出　　处：《环境化学》2012年第3期335-340,共6页Environmental Chemistry

摘　　要：采用溶胶-凝胶法制备了ZnO薄膜,并通过光电流响应、EIS、SEM、XRD等分析方法对其光电化学性能、表面形貌和结构进行表征.以制备的ZnO薄膜为工作电极对乙酰甲胺磷进行光电催化降解.实验表明,ZnO薄膜电极在UV照射下能够有效地光电催化降解乙酰甲胺磷,加入适量H2O2后具有一定的协同作用.在H2O2浓度为9.908 mmol.L-1,外加电压为1.2 V,支持电解液Na2SO4浓度为0.01 mol.L-1,溶液pH值为5.4的条件下,对0.1 mmol.L-1的乙酰甲胺磷180 min的降解率可达到89.6%.ZnO thin-film were prepared by the sol-gel method.The photoelectrochemical properties,surface morphology and structure of ZnO thin-film were characterized by photocurrent response,electrochemical impedance spectroscopy（EIS）,scanning electron microscopy（SEM） and X-ray diffraction（XRD）.ZnO thin-film were utilized as the working electrode in the photoelectrocatalytic degradation of acephate.The results showed that ZnO thin-film electrode effectively degraded acephate under UV irradiation in the presence of H2O2.The photoeletrocatalytic degradation efficiency for 0.1 mmol·L-1 acephate reached 89.6% within 3 hours under the conditions of 9.908 mmol·L-1 H2O2,external bias potential 1.2 V,pH 5.4 and 0.01 mol·L-1 Na2SO4.

关 键 词：溶胶-凝胶法 ZNO薄膜 光电催化 乙酰甲胺磷 

分 类 号：X703[环境科学与工程—环境工程]