title: Graphene quantum dots: Highly active bifunctional nanoprobes for nonenzymatic photoluminescence detection of hydroquinone.
abstract: 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.
authors.affiliation: Anhui Key Laboratory of Chemo-Biosensing; Key Laboratory of Functional Molecular Solids Ministry of Education, Anhui Laboratory of Molecule-based Materials; College of Chemistry and Materials Science; Anhui Normal University, Wuhu 241000, People's Republic of China.
authors.forename: Yuezhen
authors.initials: Y
authors.lastname: He
authors.affiliation: Anhui Key Laboratory of Chemo-Biosensing; Key Laboratory of Functional Molecular Solids Ministry of Education, Anhui Laboratory of Molecule-based Materials; College of Chemistry and Materials Science; Anhui Normal University, Wuhu 241000, People's Republic of China.
authors.forename: Jian
authors.initials: J
authors.lastname: Sun
authors.affiliation: Anhui Key Laboratory of Chemo-Biosensing; Key Laboratory of Functional Molecular Solids Ministry of Education, Anhui Laboratory of Molecule-based Materials; College of Chemistry and Materials Science; Anhui Normal University, Wuhu 241000, People's Republic of China.
authors.forename: Dexiang
authors.initials: D
authors.lastname: Feng
authors.affiliation: Anhui Key Laboratory of Chemo-Biosensing; Key Laboratory of Functional Molecular Solids Ministry of Education, Anhui Laboratory of Molecule-based Materials; College of Chemistry and Materials Science; Anhui Normal University, Wuhu 241000, People's Republic of China.
authors.forename: Hongqi
authors.initials: H
authors.lastname: Chen
authors.affiliation: Anhui Key Laboratory of Chemo-Biosensing; Key Laboratory of Functional Molecular Solids Ministry of Education, Anhui Laboratory of Molecule-based Materials; College of Chemistry and Materials Science; Anhui Normal University, Wuhu 241000, People's Republic of China.
authors.forename: Feng
authors.initials: F
authors.lastname: Gao
authors.affiliation: Anhui Key Laboratory of Chemo-Biosensing; Key Laboratory of Functional Molecular Solids Ministry of Education, Anhui Laboratory of Molecule-based Materials; College of Chemistry and Materials Science; Anhui Normal University, Wuhu 241000, People's Republic of China. Electronic address: wanglun@mail.ahnu.edu.cn.
authors.forename: Lun
authors.initials: L
authors.lastname: Wang
mesh_terms: D004867:Equipment Design; D019544:Equipment Failure Analysis; D006108:Graphite / Q000737:chemistry*; D006873:Hydroquinones / Q000032:analysis*; D008163:Luminescent Measurements / Q000295:instrumentation*; D053758:Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D010783:Photometry / Q000295:instrumentation; D045663:Quantum Dots; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D006873:Hydroquinones; D014874:Water Pollutants, Chemical; D006108:Graphite; C031927:hydroquinone
keywords: Graphene quantum dots; Hydroquinone; Peroxidase-mimicking catalytic activity; Photoluminescence