放射性(^(110)Ag^m)Ag/TiO_2复合纳米微粒的研制  

Preparation of (^(110)Ag^m)Ag/TiO_2 radioactive nano-particles

作　　者：黄旋[1] 李晴暖[1] 李宇国[1] 刘瑞丽[1] 张晓东[1] 吴世英[1] 李文新 

机构地区：[1]中国科学院上海原子核研究所纳米生物医药研究室 [2]中国科学院核分析与核技术开放实验室上海201800

出　　处：《核技术》2003年第3期229-232,共4页Nuclear Techniques

基　　金：国家自然科学基金(19975066);中国科学院创新性研究项目的资助

摘　　要：用钛酸四正丁酯水解法制备了纳米TiO2溶胶,并通过光化学沉积的方法制备Ag/TiO2复合纳米微粒。研究了浓度、pH值、乙醇等条件对复合物形成的影响,在此基础上用放射性的110Agm制备了放射性(110Agm)Ag/TiO2复合纳米微粒。实验结果表明在最佳反应条件下,用聚酰胺薄膜层析法测得约有93.6%的110Agm沉积在TiO2纳米微粒表面,放射性浓度为0.6MBq/mL;放置48小时后仍有93.0%的110Agm沉积在TiO2纳米微粒表面;经原子力显微镜测定,TiO2微粒和Ag/TiO2复合微粒的粒径分别为1—2nm和8—40nm。TiO2 colloid has been prepared by hydrolysis of titanium tetrabutoxide, while composite nano-particles of Ag/TiO2 were synthesized by photoreaction. The effects of the concentrations of reaction, pH value and the addition of ethanol on the radiochemical yield were studied. Under the optimum conditions, the composite nano-particles of (110Agm) Ag/TiO2 were synthesized with radiochemical yield of 93.6% and specific volume radioactivity of 0.6MBq/mL. The stability of (110Agm)Ag/TiO2 at pH =6.7 showed that the radiochemical yield remained to be 93.0% after 48h. The size of TiO2 and Ag/TiO2 determined by AFM microscopy were 1~2nm and 15~40nm , respectively.

关 键 词：二氧化钛 放射性纳米微粒 银110 半导体 纳米材料 掺杂 AG/TIO2 复合纳米微粒 

分 类 号：TN304.21[电子电信—物理电子学] TB383[一般工业技术—材料科学与工程]