In:
Analytical Methods, Royal Society of Chemistry (RSC), Vol. 14, No. 38 ( 2022), p. 3727-3738
Abstract:
Heavy metal pollution has spread around the world with the development of industry, posing a major threat to human health. It is urgent to design and fabricate bifunctional materials for detection and adsorption of heavy metal ions. Herein, poly(glycidyl methacrylate- co -ethylene glycol dimethacrylate) microspheres, a kind of common macroporous adsorption resin (MAR), were employed as the matrix, and carbon dots (CDs) with excellent optical properties were grafted onto the surface of MAR by surface-initiated atom transfer radical polymerization (SI-ATRP) and photo-initiated “thiol-yne” click chemistry. The synthesized MAR@poly(PA)@CD could produce fluorescence quenching with Fe 3+ . A simple fluorescence spectrometric method for detection of Fe 3+ was established. The fluorescence intensity of MAR@poly(PA)@CD decreased linearly with the concentration of Fe 3+ in the range of 0–70 nmol L −1 , with a limit of detection (LOD) of 6.6 nmol L −1 , which had the potential for trace detection. In addition, after SI-ATRP modification, many adsorption sites were generated on the surface of MAR, and the adsorption capacity for Fe 3+ was 23.8 mg g −1 . Isothermal and kinetic adsorption experiments were more consistent with the Langmuir model ( r = 0.9992) and pseudo-second-order model ( r = 0.9902), indicating that the adsorption was monolayer adsorption and chemical adsorption, respectively. MAR@poly(PA)@CD with dual functions of detecting and adsorbing Fe 3+ was successfully prepared, showing great application prospects in the environmental field.
Type of Medium:
Online Resource
ISSN:
1759-9660
,
1759-9679
Language:
English
Publisher:
Royal Society of Chemistry (RSC)
Publication Date:
2022
detail.hit.zdb_id:
2515210-5
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