悬浮态纳米TiO_2光催化降解喹啉的研究  

Study on the Photocatalytic Degradation of Quinoline by the Suspended TiO_2 Nanoparticles

作　　者：王健锋[1] 许振良[1] 丛梅[1] 杨座国[1] 王中维[1] 

机构地区：[1]华东理工大学化学工程研究所,上海200237

出　　处：《净水技术》2007年第4期44-47,76,共5页Water Purification Technology

摘　　要：采用Degussa P25 TiO2为光催化剂,在紫外光的照射下考察了有无空气、P25 TiO2催化剂用量、喹啉初始浓度、pH值及氯离子对光催化降解过程的影响。实验结果表明:空气促进喹啉和总有机碳的降解率,喹啉初始浓度越低,光催化降解过程越充分,P25 TiO2催化剂适宜浓度为0.70g/L,碱性环境下有利于喹啉的降解,pH=8.38时总有机碳的降解率达到94.47%,随着氯离子掺杂浓度的提高,总有机碳的降解率逐步下降。The effects of air or no air, P25 TiO2 catalyst weight, feed concentration of quinoline, pH value and chlorine ion concentration using Degussa P25 titanium dioxide as the photo-catalyst and ultraviolet radiation on the process of photocatalytic degradation were investigated. The experimental results showed that air accelerates the degradation rate of quinoline and TOC. The lower the feed concentration of quinoline is, the more sufficient the photocatalytic degradation process is. The suitable concentration of P25 TiO2 is 0.70 g/L. Quinoline is easier to degrade under the condition of alkaline environment when the pH value is 8.38 ,the TOC degradation rate achieve 94.47 %. With the increasing concentration of chlorine ion, the degradation rate of TOC decreases step by step.

关 键 词：二氧化钛 喹啉 总有机碳 光催化 降解 

分 类 号：X703[环境科学与工程—环境工程]