试验研究

UV/TiO2悬浮体系光催化降解碱性品红及机理研究

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  • 华南师范大学化学系, 广东 广州 510631
方建章(1966- ),环境工程博士,副研究员,现在华南师范大学化学系工作

收稿日期: 2004-01-16

  网络出版日期: 2010-10-01

Study on photocatalytic degradation of basic violet and mechanism in UV/TiO2 suspension system

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  • Chemical Department, South China Normal University, Guangzhou 510631, China

Received date: 2004-01-16

  Online published: 2010-10-01

摘要

研究了在UV/TiO2悬浮体系中光催化降解碱性品红。考察了碱性品红浓度、悬浮液pH值和外加无机盐对降解效果的影响。实验结果表明,当碱性品红质量浓度分别为20.0mg/L,30.0mg/L,40.0mg/L时,光照180min后,悬浮液中剩余的碱性品红质量浓度分别为1.8mg/L,2.3mg/L,3.4mg/L。pH=9.00时降解效果最好,当初始碱性品红质量浓度为30mg/L时,光照180min后,悬浮液中剩余的碱性品红质量浓度为0.8mg/L;pH=3.00的降解效果最差,光照180min后,悬浮液中剩余的碱性品红质量浓度为6.8mg/L;无机盐对降解效果有不同程度的负面影响。对降解机理的探讨表明光催化反应发生在光催化剂表面。

本文引用格式

方建章, 李浩, 廖锦云 . UV/TiO2悬浮体系光催化降解碱性品红及机理研究[J]. 工业水处理, 2004 , 24(8) : 18 -22 . DOI: 10.11894/1005-829x.2004.24(8).18

Abstract

The photocatalytic degradation of basic violet in UV/TiO2 system is focused on in this study. The effects of the concentration of basic violet, pH value and additive inorganic salt on degradation effeciency have been investigated. The experimental results show that when the initial concentrations of basic violet are 20.0 mg/L, 30.0 mg/L, 40.0 mg/L respectively, the remains of basic violet are 1.8 mg/L, 2.3 mg/L, 3.4 mg/L correspondingly after irradiated for 180 min. The highest and the lowest degradation effeciency are observed when pH value is 9.00 and 3.00 respectively. The inorganic salt has negative impact to different extent on degradation of basic violet. The exploration of the degradation mechanism indicates that photocatalytic degradation takes place on the surface of the photocatalysts.

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