有机颜料与表面活性剂DBS混合物的光催化降解

doi:10.7517/j.issn.1674-0475.2009.04.248

影像科学与光化学 ›› 2009, Vol. 27 ›› Issue (4): 248-255.DOI: 10.7517/j.issn.1674-0475.2009.04.248

有机颜料与表面活性剂DBS混合物的光催化降解

张天永, 王昭, 范巧芳, 杨秋生, 卢洲, 李晓旭

天津大学化工学院, 天津300072

收稿日期:2008-10-27 修回日期:2009-04-15 出版日期:2009-07-23 发布日期:2009-07-23
通讯作者: 张天永(1966- ),男,教授,主要从事光催化反应研究,通讯联系人,E-mail:tyzhang@tju.edu.cn.
基金资助:
教育部留学回国人员科研启动基金(教外司留[2002]247号);天津市自然科学基金(033604711);建设部科学技术项目基金(03-2-064)。

Photocatalytic Degradation of Organic Pigment and Surfactant DBS

ZHANG Tian-yong, WANG Zhao, FAN Qiao-fang, YANG Qiu-sheng, LU Zhou, LI Xiao-xu

School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, P. R. China

Received:2008-10-27 Revised:2009-04-15 Online:2009-07-23 Published:2009-07-23

摘要/Abstract

摘要： 以TiO₂为光催化剂,研究了表面活性剂十二烷基苯磺酸钠(DBS)和有机颜料耐晒大红BBN(BBN)为混合组分的光催化降解,结果表明,pH值、底物的用量对体系的降解有显著影响,在碱性条件下,DBS的降解速率相对较快,而在酸性环境时,颜料的降解较快,在TiO₂等电点时,降解最慢,酸性条件下, TiO₂对BBN和DBS的吸附性比在碱性和中性环境中大,BBN/DBS体系中, DBS增大了BBN的水溶性,但是没有明显提高BBN的降解褪色速度,DBS浓度为0.42 g/L时,颜料降解最快,0.042 g/L时次之,2.1 g/L时最低,在BBN降解过程中DBS自身也被降解,且略有促进作用。

关键词: 耐晒大红BBN, 表面活性剂, TiO₂, 光催化, 吸附

Abstract: Photocatalytic degradation of surfactant sodium dodecyl benzenesulfonate(DBS) and organic pigment Light Fast Scarlet BBN(BBN) was investigated using TiO₂ as photocatalyst in aqueous solution under ultraviolet light irradiation.Degradation rate and the interaction mechanism of DBS and BBN were discussed.The results show that the degradation of the bicomponents depends on pH and substrate concentraction obviously.The degradation rate of DBS was faster in alkaline medium,but the discoloration rate of BBN was faster in acidic medium.The adsorption of BBN and DBS by TiO₂ in acid medium was better than inalkaline medium or in neutral condition.In the system of BBN/DBS,the degradation rate of BBN was slightly decreased by adding DBS.When the concentration of DBS was 0.42 g/L,the degradation rate of BBN was the fastest;while the concentration of DBS was 0.042 g/L,the degradation was slightly fast;when the concentration of DBS was 2.1 g/L,the degradation was the lowest.DBS was degradated in the course of BBN degradation, and the degradation rate of DBS was slightly increased by adding DBS.

Key words: light fast scarlet BBN, surfactant, TiO₂, photocatalysis, adsorption

中图分类号:

O643

张天永, 王昭, 范巧芳, 杨秋生, 卢洲, 李晓旭. 有机颜料与表面活性剂DBS混合物的光催化降解[J]. 影像科学与光化学, 2009, 27(4): 248-255.

ZHANG Tian-yong, WANG Zhao, FAN Qiao-fang, YANG Qiu-sheng, LU Zhou, LI Xiao-xu. Photocatalytic Degradation of Organic Pigment and Surfactant DBS[J]. Imaging Science and Photochemistry, 2009, 27(4): 248-255.

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有机颜料与表面活性剂DBS混合物的光催化降解

Photocatalytic Degradation of Organic Pigment and Surfactant DBS

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