【摘要】 采用溶胶-凝胶法和化学沉淀法2种不同的方法制备高比表面积纳米二氧化硅粉体,研究不同煅烧温度(从400℃到900℃)制备的粉体作为载体对铜离子的静态吸附性能,并对吸附过程中的一些影响因素进行了探讨.结果表明制备的纳米粉体对铜离子有很强的吸附组装能力.采用溶胶—凝胶法制备的二氧化硅载体的吸附性能优于沉淀法制备的粉体.更多还原

【Abstract】 High surface area nanometer-sized SiO2 powers were prepared by Sol-Gel method and chemistry precipitation method.The static adsorption behaviors of Cu2+ on nanometer sized SiO2 powders and its sintering product ions at different temperatures(from 400℃ to 900℃) were investigated. Some influence factors in the process of adsorption were studied.The results shows that the powers have strong adsorption capacity towards Cu2+ at pH 6.0~7.0.The adsorption capability of Cu2+ on nanometer sized SiO2 powders prepared by Sol-Gel method was superior to that of powders by chemistry precipitation method.更多还原