Target-triggered inhibiting oxidase-mimicking activity of platinum nanoparticles for ultrasensitive colorimetric detection of silver ion

被引：37

作者：

Deng, Haohua ^{[1
]}

He, Shaobin ^{[1
]}

Lin, Xiuling ^{[1
]}

Yang, Lu ^{[1
]}

Lin, Zhen ^{[1
]}

Chen, Ruiting ^{[1
]}

Peng, Huaping ^{[1
]}

Chen, Wei ^{[1
]}

机构：

[1] Fujian Med Univ, Dept Pharmaceut Anal, Higher Educ Key Lab Nano Biomed Technol Fujian Pr, Fuzhou 350004, Fujian, Peoples R China

来源：

CHINESE CHEMICAL LETTERS | 2019年 / 30卷 / 09期

基金：

中国国家自然科学基金;

关键词：

Colorimetric detection; Oxidase-like activity; Platinum nanoparticle; Tetramethylbenzidine; Silver ion; PEROXIDASE MIMETICS; HEAVY-METALS; GOLD; FLUORESCENCE; CARBON; H2O2; AG; NANOSENSOR; PALLADIUM; PROBE;

D O I：

10.1016/j.cclet.2019.05.032

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The development of efficient methods for the detection of hazardous and toxic elements is extremely important for environmental security and public health. In this work, we developed a facile colorimetric assaying system for Ag+ detection in aqueous solution. Chitosan-stabilized platinum nanoparticles (Ch-PtNPs) were synthesized and severed as an artificial oxidase to catalyze the oxidation of the substrate 3,3',5,5'-tetramethylbenzidine (TMB) and generate color signal. In the presence of Ag+, due to the strong metallophilic interactions between Ag+ and Pt2+ on the surface of Ch-PtNPs, Ag+ can weaken the affinity to the substrates and inactivate the catalytic activity of Ch-PtNPs, leading to decreased absorbance signal to varying degrees depending on Ag+ amount. Combing the specific binding between Ch-PtNPs and Ag+ with signal amplification procedure based on the Ch-PtNPs-catalyzed TMB oxidation, a sensitive, selective, simple, cost-effective, and rapid detection method for Ag+ can be realized. Ag+ ions in tap and lake waters have been successfully detected. We ensured that the proposed method can be a potential alternative for Ag+ determination in environmental samples. (C) 2019 Chinese Chemical Society and Institute of Materia Medica, Chinese Academy of Medical Sciences. Published by Elsevier B.V. All rights reserved.

引用

页码：1659 / 1662

页数：4

共 40 条

[1] pH-Tunable Oxidase-Like Activity of Cerium Oxide Nanoparticles Achieving Sensitive Fluorigenic Detection of Cancer Biomarkers at Neutral pH [J].