Graphene quantum dots: Highly active bifunctional nanoprobes for nonenzymatic photoluminescence detection of hydroquinone
Graphene quantum dots: Highly active bifunctional nanoprobes for nonenzymatic photoluminescence detection of hydroquinone
复制标题
石墨烯量子点：用于对苯二酚非酶光致发光检测的高活性双功能纳米探针
DOI：
10.1016/j.bios.2015.07.006
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发表时间：
2015-12-15
影响因子：
12.6
通讯作者：
Wang, Lun
中科院分区：
文献类型：
--
作者：
He, Yuezhen;Sun, Jian;Wang, Lun
本文利用石墨烯量子点作为过氧化物酶模拟催化剂和光致发光指示剂，建立了一种简单、灵敏的对苯二酚定量光致发光方法。在溶解氧存在下，石墨烯量子点具有固有的模拟过氧化物酶的催化活性，可以催化对苯二酚氧化生成对苯醌，这是一种有效猝灭石墨烯量子点光致发光的中间体。基于这一效应，提出了一种新的对苯二酚检测荧光平台，并获得了5 nM的检测限。(C) 2015 Elsevier B.V.版权所有
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.