Journal
BIOSENSORS & BIOELECTRONICS
Volume 74, Issue -, Pages 418-422Publisher
ELSEVIER ADVANCED TECHNOLOGY
DOI: 10.1016/j.bios.2015.07.006
Keywords
Graphene quantum dots; Peroxidase-mimicking catalytic activity; Photoluminescence; Hydroquinone
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Funding
- Natural Science Foundation of China [21275008, 21405004, 21475001]
- Research Culture Funds of Anhui Normal University [2013xmpy11]
- PhD Research Startup Funds of Anhui Normal University [2014bsqdjj43]
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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 5 nM is found. (C) 2015 Elsevier B.V. All rights reserved.
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