Colorimetric detection for uranyl ions in water using vinylphosphonic acid functionalized gold nanoparticles based on smartphone

被引：20
作者：
Zhang, Linshan [1 ,2 ]
Huang, Deshun [1 ]
Zhao, Pengxiang [1 ]
Yue, Guozong [1 ]
Yang, Luming [2 ]
Dan, Weihua [2 ]
机构：
[1] China Acad Engn Phys, Inst Mat, 9 Huafengxincun, Jiangyou City 621908, Sichuan, Peoples R China
[2] Sichuan Univ, Minist Educ, Key Lab Leather Chem & Engn, Chengdu 610065, Peoples R China
来源：
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY | 2022年 / 269卷
关键词：
Colorimetric detection; Uranyl; Gold nanoparticles; Smartphone; CHEMICAL TOXICITY; URANIUM; TRACE; UO22+; CHEMISTRY;
D O I：
10.1016/j.saa.2021.120748
中图分类号：
O433 [光谱学];
学科分类号：
0703 ; 070302 ;
摘要：
A simple and portable colorimetric sensor for colorimetric detection of UO22+ in aqueous solution based on vinylphosphonic acid functionalized gold nanoparticles (VPA-AuNPs) has been developed. The VPA-AuNPs solution was prepared by sodium borohydride reduction in the presence of vinylphosphonic acid. The addition of UO22+ would induce aggregation of VPA-AuNPs, resulting in the color change from winered to blue, and red-shift of the ultraviolet-visible (UV-vis) spectra. The UO22+ assay based on VPA-AuNPs showed good selectivity and sensitivity, with a limit of detection to be approximately 2.0 mu M by naked eyes and 1.07 mu M by UV-vis (S/N = 3) respectively. Additionally, a smartphone with a free application named "PhotoMetrix" was employed to estimate the color intensities (red, green, blue value) of VPA-AuNPs in the presence of UO22+ with different concentrations, and the concentration of UO22+ samples could be conveniently exported by the calculated univariate calibration curves. This method shows good feasibility for on-site UO22+ detection in an aqueous solution. (C) 2021 Elsevier B.V. All rights reserved.
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页数：7
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