ZnO光催化降解甲基橙初步研究

研究了ZnO光催化降解甲基橙的动力学行为。在ZnO悬浊液中 ,紫外光直接照射下 ,光催化降解甲基橙 ,以分光光度法测量甲基橙即时浓度 ,从而给出不同温度下甲基橙降解脱色速率 ,并以之得出了该反应的活化能数据。实验结果表明 ,ZnO光催化甲基橙在常温下降解脱色速率基本上与温度无关 ,随温度升高小幅提高。ZnO催化能力比较强 ,可进一步研究使之实际应用。

The Preliminary Study on Photocatalytic Degradation of Methyl Orange in Aqueous Suspension of ZnO

The photocatalytic degradation of methyl orange on ZnO was.researched Under the UV ray irradiating the concentration of methyl orange in the aqueous suspension of ZnO was measured by spectrophotometry, we calculated the rate constants K of photocatalytic degradation of methyl orange between variance of temperature(25～40℃)，and we got the activation energy Ea of the reaction．The result of experimentation show the photocatalytic degradation rate had not observably effect by temperature．The rate will little increase with the increase of temperature．ZnO has good catalysis ability and can be use into reality．