In:
Journal of Materials Chemistry B, Royal Society of Chemistry (RSC), Vol. 10, No. 48 ( 2022), p. 10075-10082
Abstract:
Covalent organic frameworks (COFs) were fabricated with a hierarchical flower-like hollow structure, possessing a large specific surface area, high porosity, and excellent environmental stability. In situ growth of noble silver nanoparticles (AgNPs) onto COFs was conducted yielding COF–Ag nanozymes. The structural advantages of COFs can ensure the uniform dispersion and effective size control of AgNPs. More interestingly, the oxidase-like catalytic activity of the obtained COF–Ag nanozymes could be enhanced in the presence of Hg 2+ ions, which could specifically interact with AgNPs to form Ag–Hg alloys. A COF–Ag catalysis-based colorimetric platform was thereby constructed for highly selective and sensitive analysis of Hg 2+ ions, showing a linear concentration range from 0.050 to 10.0 μM, with a limit of detection of about 3.7 nM. Besides, the developed colorimetric strategy was successfully applied for detecting Hg 2+ ions in human blood with favorable detection recoveries, indicating its potential for applications in the biomedical analysis, environmental monitoring, and food safety fields.
Type of Medium:
Online Resource
ISSN:
2050-750X
,
2050-7518
Language:
English
Publisher:
Royal Society of Chemistry (RSC)
Publication Date:
2022
detail.hit.zdb_id:
2702241-9
detail.hit.zdb_id:
2705149-3
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