| 石英晶体微天平技术研究纳米TiO2表面Cu(Ⅱ)吸附与光化学还原过程 |
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| 引用本文： | 杨政鹏,司士辉.石英晶体微天平技术研究纳米TiO2表面Cu(Ⅱ)吸附与光化学还原过程[J].无机化学学报,2005,21(9):1402-1406. |
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| 作者姓名： | 杨政鹏 司士辉 |
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| 作者单位： | 中南大学化学化工学院,长沙 410083,中南大学化学化工学院,长沙 410083 |
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| 基金项目： | 国家自然科学基金资助项目（No.2001AA218041）,国家自然科学基金资助项目（No.20475065,20376086）. |
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| 摘 要： | The adsorption and photochemical reduction process of Cu(Ⅱ) at the surface of nanocrystalline TiO2 was investigated using in situ quartz crystal microbalance(QCM). It was found that the adsorption of Cu(Ⅱ) onto active sites of nanocrystalline fit the pseudo-second-order reaction better than the pseudo-first-order reaction, and that the rate constant of the reaction was estimated to be about 0.09 g·mmol2·min2. In addition, it was also found that the adsorption amount of Cu(Ⅱ) at the surface of TiO2 was affected by pH、concentration and coexisting anions, and the saturated amount of adsorbed Cu(Ⅱ) was approximately 1.5 mmol·g-1 at pH 4. During UV illumination, the frequency of QCM decreased gradually, which meant the photoreduction deposition of Cu(Ⅱ) from the solution, moreover, the rate of photodeposition of Cu(Ⅱ) increased with increasing pH of solution, and the rate of photoreduction enhanced obviously when the organics were introduced.
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| 关 键 词： | Cu(Ⅱ) TiO2 吸附 光还原 石英晶体微天平（QCM） |
| 文章编号： | 1001-4861(2005)09-1402-05 |
| 收稿时间： | 2005-02-22 |
| 修稿时间： | 2005-04-27 |
Adsorption and Photochemical Reduction Proeess of Cu(Ⅱ) at the Surface of Nanocrystalline TiO2 Studied by Quartz Crystal Microbalance |
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| YANG Zheng-Peng and SI Shi-Hui.Adsorption and Photochemical Reduction Proeess of Cu(Ⅱ) at the Surface of Nanocrystalline TiO2 Studied by Quartz Crystal Microbalance[J].Chinese Journal of Inorganic Chemistry,2005,21(9):1402-1406. |
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| Authors: | YANG Zheng-Peng and SI Shi-Hui |
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| Institution: | College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China and College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China |
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