Synthesis of Starch-Stabilized Ag Nanoparticles and Hg2+ Recognition in Aqueous Media

被引：114

作者：

Fan, Yingju ^{[1
,2
]}

Liu, Zhen ^{[1
]}

Wang, Le ^{[1
]}

Zhan, Jinhua ^{[1
]}

机构：

[1] Shandong Univ, Sch Chem & Chem Engn, Jinan 250100, Peoples R China

[2] Univ Jinan, Sch Chem & Chem Engn, Jinan 250022, Peoples R China

来源：

NANOSCALE RESEARCH LETTERS | 2009年 / 4卷 / 10期

关键词：

Nanoparticles; Recognition; Mercury ion; Silver; Colorimetric; GOLD NANOPARTICLES; SILVER NANOPARTICLES; FLUORESCENT CHEMOSENSOR; COLORIMETRIC DETECTION; SELECTIVE DETECTION; OPTICAL-PROPERTIES; MERCURY; IONS; CHEMODOSIMETER; SENSORS;

D O I：

10.1007/s11671-009-9387-6

中图分类号：

TB3 [工程材料学];

学科分类号：

082905 [生物质能源与材料];

摘要：

The starch-stabilized Ag nanoparticles were successfully synthesized via a reduction approach and characterized with SPR UV/Vis spectroscopy, TEM, and HRTEM. By utilizing the redox reaction between Ag nanoparticles and Hg2+, and the resulted decrease in UV/Vis signal, we develop a colorimetric method for detection of Hg2+ ion. A linear relationship stands between the absorbance intensity of the Ag nanoparticles and the concentration of Hg2+ ion over the range from 10 ppb to 1 ppm at the absorption of 390 nm. The detection limit for Hg2+ ions in homogeneous aqueous solutions is estimated to be similar to 5 ppb. This system shows excellent selectivity for Hg2+ over other metal ions including Na+, K+, Ba2+, Mg2+, Ca2+, Fe3+, and Cd2+. The results shown herein have potential implications in the development of new colorimetric sensors for easy and selective detection and monitoring of mercuric ions in aqueous solutions.

引用

页码：1230 / 1235

页数：6

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