几种离子对光催化降解罗丹明B的影响  

Effect of several ions on photocatalytic degradation of Rhodamine B

作　　者：黄雅丽[1] 徐清艳[1] 

机构地区：[1]闽江学院化学与化学工程系,福建福州350121

出　　处：《闽江学院学报》2013年第5期129-133,共5页Journal of Minjiang University

基　　金：福建省教育厅科技项目(JA11198;JB10123;JB11140)

摘　　要：采用罗丹明B作为目标降解物,考察了几种离子对光催化降解罗丹明B脱色率的影响.结果显示,低浓度的Ca2+和Al3+对罗丹明B的脱色率影响不明显,但是当它们的浓度增加到一定值后,则脱色率明显下降;当Fe3+的浓度为0.2～0.5 mmol·L-1时,其对光催化降解罗丹明B有一定的促进作用,继续增加Fe3+的浓度,反而起到明显的抑制作用;Cu2+对光催化降解罗丹明B具有显著的抑制作用;Na+、Cl-、NO-3、SO42-对光催化降解的影响均不明显,有些离子的影响机制有待进一步研究.This paper adopted Rhodamine B as a target degradation material. The effects on the decoloriza- tion rate of photocatalytic degradation of Rhodamine B of some irons have been studied. The results showed that the low concentration of Ca2＋ and AI3. had unobvious effect on the decolorization rate. But when their concentration increased to a certain value, the decolorization rate decreased evidently. When the content of Fe3 ＋ ranged from 0.2 mmol ·L-1 to 0.5 mmol ·L-1, the decolorization rate increased. However,Fe3＋ showed significantly inhibition with further raising the concentration. Cu2. had strongly negative influence on the photocatalytic reaction. Na＋ ,CI- , NO3 and SO42- had little impact on catalytic degradation. The mechanisms of the effect of some ions need further study.

关 键 词：光催化降解 罗丹明B 离子 脱色率 

分 类 号：TQ031.7[化学工程]