Silicon quantum dots-based fluorescent sensor for the detection of cobalt with high sensitivity and selectivity

Ebtihaj Mohammed Sullam ¹Khalid Mohammed Adam ²Juanjuan Liu ³Hongli Chen ³Jianxi Xiao³

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作者信息

1. State Key Laboratory of Applied Organic Chemistry,College of Chemistry and Chemical Engineering,Lanzhou University,Lanzhou 730000,China;Department of Chemistry,Faculty of Education,University of Kordofan,El Obeid 51111,Sudan
2. Department of Chemistry,Faculty of Education,University of Kordofan,El Obeid 51111,Sudan
3. State Key Laboratory of Applied Organic Chemistry,College of Chemistry and Chemical Engineering,Lanzhou University,Lanzhou 730000,China
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Abstract

Fluorescent silicon quantum dots(Si QDs)were hydrothermally synthesized from a mixture of 3(2-aminoethylamino)propyl(dimethoxymethylsilane)(AEAPDMMS)and poly(vinylpyrrolidine)(PVP).The resulting Si QDs exhibited good water solubility and high stability.Under the optimized conditions,the probe revealed an excellent linear fluorescence quenching effect on Co2+ranging from 1 μmol/L to 120μmol/L with a limit of detection of 0.37 μmol/L(based on 3s/k).The quenching mechanism was stud-ied,showing that static quenching(SQE)causes the main effect.Furthermore,the test paper based on Si QDs was prepared,which is cost-effective,high sensitivity,good selectivity,easy to use and show excel-lent anti-interference capability.This method was applied to analyze the content of Co2+in environmen-tal water samples with satisfying results.

Key words

Silicon quantum dots/Fluorescence/Poly(vinylpyrrolidine)/Test paper/Cobalt detection

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基金项目

国家自然科学基金(21874060)

国家自然科学基金(22074057)

国家自然科学基金(21775059)

出版年

2024

中国化学快报(英文版)

中国化学会

中国化学快报(英文版)

CSTPCDCSCD

影响因子：0.771

ISSN：1001-8417

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