Ag修饰纳米氧化锌的制备及光催化活性分析

Ag Modified Nano-zinc Oxide Preparation and Photocatalytic Activity Analysis

以二水合醋酸锌和一缩二乙二醇为原料,在非水体系中超声辅助获得纳米氧化锌光催化剂。采用亚甲基蓝水溶液为模拟研究对象,结合羟基自由基(·OH)清除剂叔丁醇、超氧自由基抑制剂(O_2(·-))对苯醌以及光催化助剂H_2O_2,分析了纳米氧化锌光催化降解亚甲基蓝体系中活性氧物种主要有·OH和O_2(·-)。同时,对氧化锌进行了银修饰研究,结果表明:金属Ag单质均匀分散于ZnO基底表面,修饰后的样品光响应范围拓宽至可见光区,Ag修饰提高了光生空穴和电子的分离效率,改善了催化剂的光催化性能。

Using hydrated zinc acetate and diethylene glycol as raw materials, photocatalyst zinc oxide was synthesized by ultrasonic concussion under the non-aqueous system. The catalytic performance of nanometer zinc oxide was analysed in the experiment using methylene blue aqueous, hydroxyl radical scavenger (CH3) 3COH, superoxide radical inhibitor C6H4O2 and photocatalytic promoter H2O2 as the object of simulation research, the active oxygen species mainly included ·OH and O2^·-. Meanwhile, the Ag-loaded ZnO materials study was carried out, the result indicate that the metal Ag was uniformly dispersed on the surface of ZnO substrate, the light response range of the sample was extended to the visible region, and Ag modification increased the separation efficiency of the photoinduced cavitation and electron, and improved the photocatalytic performance of the catalyst.