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Recent developments of nanoenzyme-based colorimetric sensors for heavy metal detection and the interaction mechanism

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Abstract

Heavy metal contamination has posed a great threat to human survival and social development. For this, a series of nanoenzyme-based colorimetric sensors, e.g., metal nanoparticles, metal oxides, metal sulfides, graphene-based nanomaterials, G-quadruplex and so on, were developed for the rapid and efficient detection of toxic heavy metal ions, whose detection limit for heavy metal ions could be as low as the nmol Lāˆ’1 level. The recognition mechanism was based on the catalysis and signal amplification of nanozymes, a new type of nanomaterial possessing specific catalytic activity towards certain chemical reactions such as the oxidation of colorless TMB to blue oxTMB. In this work, we are trying to present readers with a better understanding of this important colorimetric sensing material by illustrating its application in the detection of heavy metal ions using metal nanoparticles, metal oxides, metal sulfides, graphene-based nanomaterials, G-quadruplex, etc. respectively.

Graphical abstract: Recent developments of nanoenzyme-based colorimetric sensors for heavy metal detection and the interaction mechanism

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Article information


Submitted
15 Feb 2020
Accepted
11 Mar 2020
First published
13 Mar 2020

Analyst, 2020, Advance Article
Article type
Critical Review

Recent developments of nanoenzyme-based colorimetric sensors for heavy metal detection and the interaction mechanism

Z. Yan, H. Yuan, Q. Zhao, L. Xing, X. Zheng, W. Wang, Y. Zhao, Y. Yu, L. Hu and W. Yao, Analyst, 2020, Advance Article , DOI: 10.1039/D0AN00339E

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