负载型氧化亚铜材料降解有机废水的性能及机理分析 汪慧静,刘淑娟,尚晓涵,薛建良*

摘要：为提高氧化亚铜的光降解性能和解决粉末状氧化亚铜难以回收利用的问题，研究了将氧化亚铜负载到陶粒上，得到陶粒-Cu2O复合材料，研究材料的降解性能和机理。结果表明，在无光和光照条件下陶粒、Cu2O、陶粒-Cu2O三种材料对亚甲基蓝具有明显不同的降解效率，且光照条件下降解效率明显提高，这说明在光照条件下，陶粒-Cu2O材料两者协同作用，不仅有吸附作用，而且有光降解效果；分析加入H2O2对陶粒--Cu2O复合材料降解性能的影响，发现Cu2O产生的电子-空穴对可以加速H2O2的水解，产生大量的强氧化性基团，有效的提高光降解性能；进一步分析陶粒-Cu2O复合材料的降解机理发现，陶粒-Cu2O降解污染物分为三个阶段，其中第一个阶段吸附起主导作用符合一维线性模型，第二个阶段光降解起重要作用，符合y = -0.0069x2 + 1.1843x + 26.978模型，第三阶段趋于平稳。

Degradation Performance and Mechanism Analysis of Supported Cuprous Oxide to deal with the organic wastewater

In order to improve the photo-degradation performance of cuprous oxide and solve the problem of recycling, in the paper, ceramsite-Cu2O was prepared, and the composite degradation performance and mechanism was studied. The results showed that under the condition of no light and light, the degradation of three kinds of materials (ceramsite, Cu2O, ceramsite-Cu2O) were obvious different efficiency, and under the condition of light, the degradation efficiency improved obviously. This indicated that under the condition of light, the degradation performance and mechanism of ceramsite-Cu2O composite materials are both adsorbed degradation and photo-degradation. Analysis the degradation performance of ceramsite-Cu2O composite with H2O2, the resluts indicated that electronic - hole produced by Cu2O could accelerate the hydrolysis of H2O2, then, a lot of strong oxidizing groups could be produced, which could effectively improve the photo-degradation performance. Further analysis degradation mechanism of ceramsite-Cu2O , the process of degradation of pollutants could be divided into three phases: In the first phase, adsorption plays a leading role, which conforms to one dimensional linear model. In the second stage, photo-degradation plays an important role, which comply with y = -0.0069 x2 + 1.1843x + 26.978 model. The third stage leveled off.