Graphene quantum dots: Highly active bifunctional nanoprobes for nonenzymatic photoluminescence detection of hydroquinone

In this paper, a simple and sensitive photoluminescence method is developed for the hydroquinone quantitation by using graphene quantum dots which simultaneously serve as a peroxidase-mimicking catalyst and a photoluminescence indicator. In the presence of dissolved oxygen, graphene quantum dots wit...

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Bibliographic Details
Published in:Biosensors & bioelectronics 2015-12, Vol.74, p.418-422
Main Authors: He, Yuezhen, Sun, Jian, Feng, Dexiang, Chen, Hongqi, Gao, Feng, Wang, Lun
Format: Article
Language:English
Subjects:
Bioelectricity
Biotechnology
Equipment Design
Equipment Failure Analysis
Fluorescence
Graphene
Graphene quantum dots
Graphite - chemistry
Hydroquinone
Hydroquinones - analysis
Luminescent Measurements - instrumentation
Nanoparticles - chemistry
Nanoparticles - ultrastructure
Peroxidase-mimicking catalytic activity
Photoluminescence
Photometry - instrumentation
Platforms
Quantum Dots
Reproducibility of Results
Sensitivity and Specificity
Water Pollutants, Chemical - analysis
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Summary:In this paper, a simple and sensitive photoluminescence method is developed for the hydroquinone quantitation by using graphene quantum dots which simultaneously serve as a peroxidase-mimicking catalyst and a photoluminescence indicator. In the presence of dissolved oxygen, graphene quantum dots with intrinsic peroxidase-mimicking catalytic activity can catalyze the oxidation of hydroquinone to produce p-benzoquinone, an intermediate, which can efficiently quench graphene quantum dots' photoluminescence. Based on this effect, a novel fluorescent platform is proposed for the sensing of hydroquinone, and the detection limit of 5nM is found. •Graphene quantum dots (GQDs) are used as sensing platform for hydroquinone detection.•GOQs serve as a peroxidase-mimicking catalyst and a photoluminescence indicator.•The sensor is very green and simple because GQDs are the only reagents used.
ISSN:0956-5663
1873-4235
DOI:10.1016/j.bios.2015.07.006