碘诱导Ag@AgI复合纳米颗粒的形成及碘离子的可视化分析  

Iodine-Induced Formation of Ag@AgI Composite Nanoparticles and Visual Detection of Iodide

作　　者：郑林玲[1] 凌剑[1] 刘跃[1] 黄承志[1,2] 

机构地区：[1]发光与实时分析教育部重点实验室,西南大学化学化工学院,重庆400715 [2]两南大学药学院,重庆400715

出　　处：《分析化学》2012年第9期1385-1390,共6页Chinese Journal of Analytical Chemistry

基　　金：国家自然科学基金(No.21035005)资助

摘　　要：在CuCl2和KI同时存在下,银纳米颗粒表面被氧化,生成Ag@AgI复合纳米颗粒,使得银纳米颗粒在410nm处的等离子体共振光散射信号降低。该光散射信号变化很容易在普通白色发光二极管(LED)光照射下观察到,据此建立了一种简单的I!可视化分析方法。在pH 7.4Tris-HCl缓冲溶液中,在1.0×10!4 mol/LCuCl2溶液存在下,I!检测的线性范围为2.0×10!7～2.0×10!5 mol/L,相关系数为0.9959。常见阴离子对测定无干扰。将本方法用于环境水样和尿液中I!检测,加标回收率分别为95.0%～97.0%和98.7%～103.1%。In the presence of KI and CuC12, silver nanoparticles （AgNPs） were transformed to Ag@ AgI composite nanoparticles, reducing the localized plasmon resonance light scattering signal （LPRLS） of AgNPs at 410 nm, which could be easily observed by naked eyes under the irradiation of a common light- emitting diode （LED） torch. Thus, a simple and visual detection method of iodide in the range of 2.0×10^-7 -2.0）〈 10^-5 mol/L was established with correlation coefficient of 0. 9959 in the presence of Tris-HC1 buffer solution （pH 7.4） and 1.0 ×10-4 mol/L CuCI2 solution. Common anions have no interfering effects on the detection. The present method has been applied for the analysis of the environmental water and urine samples with the recovery from 95.0 %-97.0 % and 98.7 % 103.1 %, respectively.

关 键 词：银纳米颗粒 Ag@AgI复合纳米颗粒 等离子体共振光散射 碘离子 氯化铜 

分 类 号：TB383.1[一般工业技术—材料科学与工程]