Solvothermal method to prepare graphene quantum dots by hydrogen peroxide

Simple and efficient synthesis of graphene quantum dots (GQDs) with anodic electrochemiluminescence (ECL) remains a great challenge. Herein, we present an anodic ECL-sensing platform based on nitrogen-doped GQDs (N-GQDs), which enables sensitive detection of hydrogen peroxide (H2O2) and glucose. N-GQDs are easily prepared using one-step molecular fusion between carbon precursor and a dopant in an alkaline hydrothermal process. The synthesis is simple, green, and has high production yield. The as-prepared N-GQDs exhibit a single graphene-layered structure, uniform size, and good crystalline. In the presence of H2O2, N-GQDs possess high anodic ECL activity owing to the functional hydrazide groups. With N-GQDs being ECL probes, sensitive detection of H2O2 in the range of 0.3–100.0 μM with a limit of detection or LOD of 63 nM is achieved. As the oxidation of glucose catalyzed by glucose oxidase (GOx) produces H2O2, sensitive detection of glucose is also realized in the range of 0.7–90.0 μM (LOD of 96 nM).

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GRAPHENE QUANTUM DOTS AS A REDUCING REAGENT AND STABILIZER FOR GREEN SYNTHESIS OF SILVER NANOPARTICLES: TOWARDS A HYDROGEN PEROXIDE AND GLUCOSE SENSOR

Vietnam Journal of Science and Technology ◽

10.15625/2525-2518/56/1a/12515 ◽

2018 ◽

Vol 56 (1A) ◽

pp. 146 ◽

Cited By ~ 1

Author(s):

Tran Vinh Hoang

Keyword(s):

Hydrogen Peroxide ◽

Quantum Dots ◽

Silver Nanoparticles ◽

Glucose Sensor ◽

Graphene Quantum Dots ◽

X Ray Diffraction ◽

Simple Method ◽

Transmission Electron ◽

Sensitivity And Selectivity ◽

Signal Probe

In this work, we have developed a simple method for preparation of silver nanoparticles/graphene quantum dots hybrid (AgNPs/GQDs) using graphene quantum dots (GQDs) as reducing reagent and stabilizer. The synthesized GQDs and AgNPs/GQDs hybrid have been characterized by ultraviolet–visible spectroscopy (UV-Vis), photoluminescence (PL), X-ray diffraction (XRD) and transmission electron microscopy (TEM). Results indicated that mono-dispersed AgNPs were obtained with particles size around 30 nm. Based on the etching of silver nanoparticles by hydrogen peroxide (H2O2), we have constructed a colorimetric sensor for H2O2 and glucose sensors basing on the use of AgNPs/GQDs hybrid as capture probe and signal probe. The fabricated sensors performed excellent sensitivity and selectivity, high reproducibility for H2O2 and glucose detection with a low detection limit of 100 nM and 0.1 mM for hydrogen peroxide and glucose, respectively.

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In Situ Growth of Surfactant-Free Gold Nanoparticles on Nitrogen-Doped Graphene Quantum Dots for Electrochemical Detection of Hydrogen Peroxide in Biological Environments

Analytical Chemistry ◽

10.1021/ac5041555 ◽

2015 ◽

Vol 87 (3) ◽

pp. 1903-1910 ◽

Cited By ~ 385

Author(s):

Jian Ju ◽

Wei Chen

Keyword(s):

Hydrogen Peroxide ◽

Quantum Dots ◽

Gold Nanoparticles ◽

Graphene Quantum Dots ◽

In Situ Growth ◽

Nitrogen Doped ◽

Free Gold ◽

Nitrogen Doped Graphene ◽

Doped Graphene

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A new mild, clean and highly efficient method for the preparation of graphene quantum dots without by-products

Journal of Materials Chemistry B ◽

10.1039/c5tb01093d ◽

2015 ◽

Vol 3 (34) ◽

pp. 6871-6876 ◽

Cited By ~ 61

Author(s):

Chong Zhu ◽

Siwei Yang ◽

Gang Wang ◽

Runwei Mo ◽

Peng He ◽

...

Keyword(s):

Hydrogen Peroxide ◽

Quantum Dots ◽

Graphene Oxide ◽

Tungsten Oxide ◽

Hydroxyl Radicals ◽

Efficient Method ◽

Graphene Quantum Dots ◽

Catalytic Decomposition ◽

Highly Efficient ◽

By Products

We demonstrated that graphene oxide can be oxidized and cut into graphene quantum dots by hydroxyl radicals which is obtained by catalytic decomposition of hydrogen peroxide with a tungsten oxide nanowire catalyst.

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