| 光谱学与光谱分析 |
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| Spectrum Study of Organochlorine Pesticides after Nano TiO2 Photocatalytic Degradation in AgNO3 Medium |
| LI Mei-jin1,QIU Bin1,GUO Guang-mei3,LIU Mei-hua1,CHEN Xi1,2* |
1. Key Laboratory of Analysis and Detection Technology for Food Safety (Fuzhou University), Ministry of Education, Department of Chemistry, Fuzhou University, Fuzhou 350002, China
2. State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen 361005, China
3. College of Sciences, Hebei University of Science and Technology, Shijiazhuang 050018, China |
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Abstract A study on a nano anatase TiO2 production from the hydrolysis of TiCl4 was presented. In the nano TiO2 suspending medium, the photocatalytic behaviors for some organochlorine pesticides including α，β，γ，δ-BHC, DDT, dieldrin, dicofol and agroceres were compared and studied under UV irradiation in the air. Owing to structural difference of C—Cl in the molecule, the degradation efficiencies for the organochlorine pesticides presented an obvious difference with the order of dicofol＞dieldrin＞DDT＞agroceres and α-BHC＞γ-BHC＞δ-BHC＞β-BHC. Accordingly, the nano TiO2 material was applied as a photocatalyzer, which catalyzed transformation of organochlorine pesticide to chlorine ion. Nanoparticle of silver chloride with a maximal absorbance at the wavelength of 260 nm were prepared in the surfactant polyvinyl alcohol solution. Organochlorine pesticides could be determined according to the concentration of silver chloride.
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Received: 2006-11-06
Accepted: 2007-02-22
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Corresponding Authors:
CHEN Xi
E-mail: xichen@xmu.edu.cn
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[2] HUANG Ya-jun，LIU Guang-ming, LUO Feng-jian, et al（黄雅俊，刘光明，罗逢健, 等）. Pesticide Science and Administration（农药科学与管理），2000, 21: 18.
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