基于智能手机的乙烯基膦酸功能化金纳米粒子用于水中铀酰离子的比色检测
Colorimetric detection for uranyl ions in water using vinylphosphonic acid functionalized gold nanoparticles based on smartphone.
机构信息
Institute of Materials, China Academy of Engineering Physics, No. 9, Huafengxincun, Jiangyou City, Sichuan Province 621908, PR China; The Key Laboratory of Leather Chemistry and Engineering of Ministry of Education, Sichuan University, Chengdu 610065, PR China.
Institute of Materials, China Academy of Engineering Physics, No. 9, Huafengxincun, Jiangyou City, Sichuan Province 621908, PR China.
出版信息
Spectrochim Acta A Mol Biomol Spectrosc. 2022 Mar 15;269:120748. doi: 10.1016/j.saa.2021.120748. Epub 2021 Dec 13.
A simple and portable colorimetric sensor for colorimetric detection of UO 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 UO would induce aggregation of VPA-AuNPs, resulting in the color change from wine-red to blue, and red-shift of the ultraviolet-visible (UV-vis) spectra. The UO assay based on VPA-AuNPs showed good selectivity and sensitivity, with a limit of detection to be approximately 2.0 μM by naked eyes and 1.07 μM 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 UO with different concentrations, and the concentration of UO samples could be conveniently exported by the calculated univariate calibration curves. This method shows good feasibility for on-site UO detection in an aqueous solution.
基于乙烯基膦酸功能化金纳米粒子 (VPA-AuNPs) ，开发了一种用于水溶液中 UO 比色检测的简单、便携的比色传感器。VPA-AuNPs 溶液是通过在存在乙烯基膦酸的情况下用硼氢化钠还原制备的。UO 的加入会诱导 VPA-AuNPs 的聚集，导致颜色从酒红色变为蓝色，紫外-可见 (UV-vis) 光谱发生红移。基于 VPA-AuNPs 的 UO 测定表现出良好的选择性和灵敏度，通过肉眼观察的检出限约为 2.0 μM，通过 UV-vis (S/N = 3) 的检出限约为 1.07 μM。此外，还使用了带有免费应用程序“PhotoMetrix”的智能手机来估计存在不同浓度 UO 时 VPA-AuNPs 的颜色强度（红色、绿色、蓝色值），并可以通过计算的单变量校准曲线方便地导出 UO 样品的浓度。该方法在水溶液中现场 UO 检测方面具有良好的可行性。
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