摘要
The adsorption and photochemical reduction process of Cu! at the surface of nanocrystalline TiO2 was investigated using in situ quartz crystal microbalance(QCM). It was found that the adsorption of Cu! 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·mmol-·1min-1. In addition, it was also found that the adsorption amount of Cu! at the surface of TiO2 was affected by pH、concentration and coexisting an- ions, and the saturated amount of adsorbed Cu! was approximately 1.5 mmol·g-1 at pH 4. During UV illumina- tion, the frequency of QCM decreased gradually, which meant the photoreduction deposition of Cu! from the solution, moreover, the rate of photodeposition of Cu! increased with increasing pH of solution, and the rate of photoreduction enhanced obviously when the organics were introduced.
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·mmol^-1·min^-1. 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.
出处
《无机化学学报》
SCIE
CAS
CSCD
北大核心
2005年第9期1402-1406,共5页
Chinese Journal of Inorganic Chemistry
基金
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)
