教授 博士生导师 硕士生导师
性别: 男
毕业院校: 大连理工大学
学位: 博士
所在单位: 化工学院
学科: 精细化工
办公地点: 大连理工大学西部校区E-226
联系方式: 0411-84986304
电子邮箱: dujj@dlut.edu.cn
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论文类型: 期刊论文
发表时间: 2018-02-01
发表刊物: SENSORS AND ACTUATORS B-CHEMICAL
收录刊物: SCIE、EI
卷号: 255
页面范围: 808-813
ISSN号: 0925-4005
关键字: Gold nanoparticle; Ag+ detection; Environmental monitoring; Synergistic coordination; Colorimetric sensor
摘要: Silver is one of most important heavy metals, which affects the environment and organism significantly along with its widespread applications. An interesting gold nanoparticles (AuNPs)-based system, in this work, was fabricated using the adenosine and creatinine for the colorimetric recognition of the Ag+ via a red-to-blue color change. A synergistic coordination of these two biomolecules with Ag+ on AuNPs' surface supplied an excellent selectivity than examples by a single ligand-modified AuNPs in literatures. It realized a qualitative Ag+ recognition by naked eyes in aqueous media, as well as a quantitative determination by the UV-vis spectrometer over a range of 0.1-0.9 mu M, covering the Ag+ standard in drinking waters (0.46 p[M, US Environmental Protection Agency). This system is not only convenient but also very sensitive with a limit detection of 7.3 nM. This platform is applicable for the Ag+ recognition in mimic pollution samples with a good repeatability and relative standard deviation. (C) 2017 Published by Elsevier B.V.