| TiO_2膜光催化降解4,4’-二溴联苯的研究 |
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| 引用本文： | 季彩宏,张萍,韩萍芳,吕效平. TiO_2膜光催化降解4,4’-二溴联苯的研究[J]. 环境工程学报, 2009, 3(1) |
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| 作者姓名： | 季彩宏 张萍 韩萍芳 吕效平 |
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| 作者单位： | 南京工业大学理学院,南京,210009 |
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| 基金项目： | 江苏省青蓝工程资助项目 |
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| 摘 要： | 研究了负载于玻璃上的同定化催化剂TiO2膜光催化降解水中4,4'-二溴联苯(4,4'-DBB)的效果,考察了溶液pH值和4,4'-DBB初始浓度等对TiO2膜光催化降解4,4'-DBB的影响,探讨了降解机理.结果表明.TiO2膜光催化降解水中4,4'-DBB的效果良好,紫外光照射8 b,初始浓度为4 mg/L的4,4'-DBB的降解率高达94%,降解速率随着4,4'-DBB初始浓度的增大而下降.在溶液pH=1时,4,4'-DBB的降解效率最高.超声的加入使降解反应的速率加快.经拟合发现4,4'-DBB的降解符合拟一级反应规律,并推导出动力学方程.
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| 关 键 词： | 4,4'-二溴联苯 TiO2薄膜 光催化 超声 |
Study on photodegradation of 4,4'-dibrominated biphenyl by TiO_2 thin film |
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| Ji Caihong,Zhang Ping,Han Pingfang,Lu Xiaoping. Study on photodegradation of 4,4'-dibrominated biphenyl by TiO_2 thin film[J]. Techniques and Equipment for Environmental Pollution Control, 2009, 3(1) |
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| Authors: | Ji Caihong Zhang Ping Han Pingfang Lu Xiaoping |
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| Affiliation: | College of Science;Nanjing University of Technology;Nanjing 210009 |
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| Abstract: | The efficiency of photodegradation of 4,4'-DBB in water by fixed photocatalyst TiO2 thin film loaded on glass was studied.The influence of solution pH value and initial 4,4'-DBB concentration on photodegradation of 4,4'-DBB was investigated and the mechanism of photodegradation of 4,4'-DBB was discussed.The result showed that the efficiency of photodegradation of 4,4'-DBB in water by TiO2 thin film was good.The degradation rate of 4,4'-DBB(4 mg/L)was up to 94% after eight hours ultraviolet irradiation.The d... |
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| Keywords: | 4 4'-dibrominated biphenyl TiO2 thin film photodegradation ultrasound |
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