摘要
溶胶-凝胶法合成高比表面积纳米Al_2O_3,以透射电镜(TEM)、X射线衍射(XRD)等手段对不同温度下所得纳米Al_2O_3进行表征.以原子吸收光谱(AAS)为检测手段,在不同煅烧温度下,改变吸附条件如振荡时间、溶液的pH值,研究纳米Al_2O_3材料对Cu^(2+)的吸附性能.结果表明:随着振荡时间的增长,达到一定时间后,Al_2O_3的吸附容量先增大而后达到最大值不变;当硫酸铜溶液的pH值改变时,在1.0～7.0之间,Al_2O_3对Cu^(2+)有明显吸附,且在pH=3.2达最大;煅烧温度的不同,Al_2O_3的吸附情况也不同,在600℃左右制备的Al_2O_3对Cu^(2+)的吸附容量最大.
High specific surface area of nano-Al2O3 was successfully prepared by sol-gel method. The nano-Al2O3 prepared under different temperature was characterized by transmission electron microscopy （TEM）, X-ray diffraction （XRD）. With different calcination temperature, the adsorption of Cu^2＋ on the alumina powder was investigated by atomic absorption spectrometry （AAS） with changing conditions such as ultrasonic adsorption time, the solution pH value. The results indicated that, with the ultrasonic adsorption time lengthening, reaching the certain time, the Al2O3 adsorption capacity increased to the maximum; when cupric sulfate solution pH value changed, between 1.0- 7.0, Al2O3 has the obvious adsorption to Cu^2＋, reaching the maximum at pH=3.2; with calcining temperature difference, Al2O3 adsorption capability was also different, about 600℃, maximum to the cupric ion adsorption capacity.
出处
《湖北大学学报（自然科学版）》
CAS
北大核心
2007年第4期381-383,391,共4页
Journal of Hubei University：Natural Science
基金
湖北省耐火材料与高温陶瓷重点实验室一省部共建国家重点实验室培育基地开放课题基金(G0401)资助项目
湖北大学自然科学基金(020-095139)资助
