氧化亚铜可见光催化降解罗丹明B的初步研究

以Cu2O粒子为光催化剂，太阳光为光源，研究了Cu2O粒子对可溶性染料罗丹明B的光催化降解情况。并考察了不同光源，光照时间，催化剂用量，双氧水加入量和溶液的酸度等对罗丹明B光催化降解过程的影响。结果表明，Cu2O粒子在太阳光照射下，能较好地降解罗丹明B，其最佳反应条件为：罗丹明B浓度为5mg／L，催化剂（Cu2O）为0．75g／L，pH值为5．2，H2O2加入量1．0％，反应时间25min。此条件下，罗丹明B的降解率达到100％，即与在500W高压汞灯紫外（λ=365nm）光照有相同的降解效果。

Study of degradation of rhodamine B by cuprous oxide under solar light

The photocatalytic degradation of the rhodamine B by the cuprous oxide under the solar light is investigated.The various light source,illuminated time,dosage of the catalysts,amount of the hydrogen peroxide and the pH of the reaction system are discussed.It shows that the rhodamine B can be completely degradated under the solar light in the presence of the cuprous oxide and hydrogen peroxide.The best reaction conditions are: rhodamine B 5mg/L,cuprous oxide 0.75g/L,pH value 5.2,hydrogen peroxide 1% and reaction time 25min.The reaction is compared with that of 500w high pressure mercury lamp.