| 纳米TiO2膜用于光催化氧化测定化学需氧量的研究 |
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| 引用本文： | 丁红春,柴怡浩,张中海,刘梅川,鲜跃仲,潘振声,金利通.纳米TiO2膜用于光催化氧化测定化学需氧量的研究[J].中国化学,2005,23(10):1425-1429. |
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| 作者姓名： | 丁红春 柴怡浩 张中海 刘梅川 鲜跃仲 潘振声 金利通 |
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| 作者单位： | [1]Department of Chemistry, East China Normal University, Shanghai 200062, China |
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| 基金项目： | Project supported by the National Natural Science Foundation of China （No. 20327001）, the Key Research ＆ Development Program of China （No. 2004BA210A07）. |
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| 摘 要： | A photocatalytic oxidation method for determination of chemical oxygen demand （COD） using nano-TiO2 film, based on the use of a nano-TiO2-Ce（SO4）2 system and electrochemical detection, was proposed. The technique was originated from the direct determination of the Ce（Ⅲ） concentration change resulting from photocatalytic oxidation of organic compounds. Ce（Ⅲ）, which was produced by photocatalytic reduction of Ce（SO4）2, could be measured at a multi-walled carbon nanotubes （MWNT） chemically modified electrode （CME）. The COD values by this method were calculated from the differential pulse voltammetry （DPV） current of Ce（Ⅲ） at the CME. Under the optimal operation conditions, the detection limit of 0.5 mg·L^-1 COD with the linear range of 1-600 mg·L^-1 was achieved. This method was also applied to determination of various COD of ground water and wastewater samples. The resuits were in good agreement with those from the conventional COD methods, i.e., permanganate and dichromate ones.
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| 关 键 词： | TiO2 纳米薄膜 氧化反应 COD 化学需氧量 电化学 |
| 收稿时间： | 2005-01-21 |
| 修稿时间： | 2005-01-212005-06-19 |
Photocatalytic Oxidation for Determination of Chemical Oxygen Demand Using Nano-TiO2 Film |
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| Ding GongChun;Chai YiHao;Zhang ZhongHai;Liu MeiChuan;Xian YueZhong;Pan ZheSheng;Jin LiTong.Photocatalytic Oxidation for Determination of Chemical Oxygen Demand Using Nano-TiO2 Film[J].Chinese Journal of Chemistry,2005,23(10):1425-1429. |
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| Authors: | Ding GongChun;Chai YiHao;Zhang ZhongHai;Liu MeiChuan;Xian YueZhong;Pan ZheSheng;Jin LiTong |
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| Abstract: | A photocatalytic oxidation method for determination of chemical oxygen demand (COD) using nano‐TiO2 film, based on the use of a nano‐TiO2‐Ce(SO4)2 system and electrochemical detection, was proposed. The technique was originated from the direct determination of the Ce(III) concentration change resulting from photocatalytic oxidation of organic compounds. Ce(III), which was produced by photocatalytic reduction of Ce(SO4)2, could be measured at a multi‐walled carbon nanotubes (MWNT) chemically modified electrode (CME). The COD values by this method were calculated from the differential pulse voltammetry (DPV) current of Ce(III) at the CME. Under the optimal operation conditions, the detection limit of 0.5 mg·L?1 COD with the linear range of 1–600 mg·L?1 was achieved. This method was also applied to determination of various COD of ground water and wastewater samples. The results were in good agreement with those from the conventional COD methods, i.e., permanganate and dichromate ones. |
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| Keywords: | photocatalytic oxidation chemical oxygen demand electrochemical detection nano-TiO2 film |
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