| 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 |
| Adsorption and Photochemical Reduction Process of Cu(Ⅱ) at the Surface of Nanocrystalline TiO2 Studied by Quartz Crystal Microbalance |
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| 摘要: |
| 关键词: Cu(Ⅱ) TiO2 吸附 光还原 石英晶体微天平（QCM） |
| 基金项目: |
| Abstract: 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. |
| Keywords: Copper(Ⅱ) titanium dioxide adsorption photoreduction quartz crystal microbalance(QCM) |
| 投稿时间：2005-02-22 修订日期：2005-04-27 |
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| 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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