纳米Cu_2O的特殊液相沉淀法制备及其光催化活性

Nano-Cu_2O prepared by special liquid-phase precipitation and its photocatalytic activity

采用高强度机械混合的特殊液相沉淀法制备了纳米Cu2O粉体,通过TEM和XRD对其进行表征。用它做催化剂在日光作用下对酸性品红溶液进行了光催化降解实验,研究了葡萄糖添加浓度、酸性品红溶液的初始浓度和催化剂的重复使用对光催化性能的影响。结果表明分散剂葡萄糖浓度为7g/L时制得的纳米Cu2O光催化活性最佳,当酸性品红溶液的初始浓度为6mg/L时,2.5h降解率高达99.1%,重复使用6次后其降解率仍可达到75%。

Nano-Cu2O powders were prepared by special liquid-phase precipitation with high strength mechanical mixing and characterized with XRD and TEM. The photocatalytic behavior of such prepared nano-Cu2O was evaluated by the decomposition of acidic fuchsine solution under daylight. The influence of glucose addition and the initial concentration of acidic fuchsine solution as well as the catalyst reusability were examined. A 99.1% photocatalyzed degradation was achieved with 6mg/L initial concentration of acidic fuchsine solution in 2.5h added with 7g/L of glucose. This photocatalytic degradation remained with 75% after the catalyst repetitively used for 6 times.