| Ag沉积TiO_2光催化降解腐植酸研究 |
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| 引用本文： | 陈德强,张代明,韦昭平.Ag沉积TiO_2光催化降解腐植酸研究[J].安徽农业科学,2010,38(17):9379-9381. |
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| 作者姓名： | 陈德强 张代明 韦昭平 |
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| 作者单位： | 河海大学环境科学与工程学院,江苏南京,210098 |
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| 基金项目： | 河海大学自然科学基金，中央高校基本科研业务费专项资金 |
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| 摘 要： | 目的]为饮用水中腐植酸的去除提供新思路。方法]采用光还原法对纳米TiO2进行Ag沉积,研究改性TiO2/UV体系对腐殖酸的光降解效率,并探讨TiO2用量及腐植酸初始浓度对光降解效率的影响。结果]适量Ag沉积可提高TiO2的光催化活性,Ag沉积量为0.8wt%时TiO2的光催化活性最大;焙烧温度为400℃时TiO2的光催化活性最强;增加TiO2用量可提高腐植酸的光降解反应速率;在试验浓度范围内,随着腐植酸初始浓度的增大,其光降解效率降低,光降解过程符合Langmuir-Hinshelwood动力学模型,反应速率常数k和Langmuir吸附常数K分别为0.173 5 mg/（L.min）和0.421 5 L/mg。结论]适量的Ag沉积可提高TiO2光催化降解腐植酸的活性。
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| 关 键 词： | TiO2 Ag沉积 腐植酸 光降解 |
Study on Photocatalytic Degradation of Humic Acid by Ag Deposited TiO2 |
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| CHEN De-qiang et al.Study on Photocatalytic Degradation of Humic Acid by Ag Deposited TiO2[J].Journal of Anhui Agricultural Sciences,2010,38(17):9379-9381. |
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| Authors: | CHEN De-qiang |
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| Institution: | CHEN De-qiang et al(College of Environmental Science and Engineering,Hehai University,Nanjing,Jiangsu 210098) |
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| Abstract: | Objective] The study was to provide a new method for removing humic acids in drinking water.Method] Nanometer TiO2 was deposited by Ag with photo reduction method.The photodegradation efficiency of modification TiO2/UV system on humic acid was studied and the effects of TiO2 dosage and initial concn.of humic acid on photodegradation efficiencies were explored.Results] Ag deposition with appropriate amount could improve the photocatalytic activity of TiO2.The photocatalytic activity of TiO2 was the maximu... |
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| Keywords: | TiO2 |
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