氧化锌制备及其光催化活性研究

Study on preparation and photocatalytic activity of ZnO

以二水合醋酸锌为原料、二甘醇为溶剂,采用非水解溶胶-凝胶过程的方法合成了氧化锌(ZnO)光催化剂,并用XRD对其进行了表征。以甲基橙为光催化反应的模型化合物,考察了ZnO光催化剂的紫外及可见光催化活性。探索添加不同清除剂(异丙醇、草酸铵、对苯醌、H2O2酶)后对紫外及可见光催化活性的影响;以对苯二甲酸作为探针分子,结合化学荧光技术研究了ZnO光催化剂表面羟基自由基的生成。实验结果表明:此方法制备的ZnO具有良好的光催化性能。

Using hydrated zinc acetate as raw material and diethylene glycol as solvent, zinc oxide was synthesized by the method of nonhydrolytic sol-gel process. The catalyst was characterized by XRD. With methyl orange as the model compound of photocatalytie reaction, photocatalytic activities of zinc oxide at UV and visible light were investiga- ted, Changing of photocatalytic activities at ultraviolet and visible light were investigated after adding a variety of scaven- ger. The formation of hydroxyl radical on the surface of ZnO of heterogeneous photocatalysts was studied by terephthalic acid as a probe molecule, combined with fluorescence technique. The experimental results showed that ZnO photocatalyst prepared in this experiment had a good photocatalytic performance.