Facile synthesis of N-doped graphene quantum dots as a fluorescent sensor for Cr() and folic acid detection

The development of stable fluorescent sensors for toxic pollutants and drugs is meaningful to the environment and public health. In this work, nitrogen-doped graphene quantum dots (N-GQDs) were facially synthesized by a one-step hydrothermal method using soluble starch and l -arginine as carbon and...

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Bibliographic Details
Published in:RSC advances 2024-08, Vol.14 (36), p.26667-26673
Main Authors: Ni, Chu-Sen, Zhang, Wen-Jie, Bi, Wen-Zhu, Wu, Ming-Xia, Feng, Su-Xiang, Chen, Xiao-Lan, Qu, Ling-Bo
Format: Article
Language:English
Subjects:
Acids
Chemistry
Environmental monitoring
Fluorescence
Folic acid
Graphene
Nitrogen
Public health
Quantum dots
Sensors
Synthesis
Thermal stability
Vitamin B
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Summary:The development of stable fluorescent sensors for toxic pollutants and drugs is meaningful to the environment and public health. In this work, nitrogen-doped graphene quantum dots (N-GQDs) were facially synthesized by a one-step hydrothermal method using soluble starch and l -arginine as carbon and nitrogen sources in pure water at 190 °C for 4 h. The as-synthesized N-GQDs were well characterized and displayed blue fluorescence emission at 445 nm with excellent pH stability, salt tolerance, thermostability, photobleaching resistance and reproducibility. Moreover, N-GQDs could serve as an "on-off" sensor for selective detection of Cr( vi ) and folic acid with low detection limit (0.80 and 2.1 μM), good linear correlation over wide linear range (0-50 μM and 0-200 μM) as well as short response time (
ISSN:2046-2069
2046-2069
DOI:10.1039/d4ra05016a