scholarly journals An ultrasonic-assisted synthesis of leather-derived luminescent graphene quantum dots: catalytic reduction and switch on–off probe for nitro-explosives

RSC Advances ◽  
2020 ◽  
Vol 10 (39) ◽  
pp. 22959-22965
Author(s):  
Shamsa Kanwal ◽  
Shanaz Jahan ◽  
Farukh Mansoor
Keyword(s):  
Quantum Dots ◽  
Catalytic Reduction ◽  
Research Effort ◽  
Graphene Quantum Dots ◽  
Nitro Explosives ◽  
Ultrasonic Assisted ◽  
Current Research Effort

The current research effort demonstrates the ultrasonic-assisted synthesis of highly fluorescent graphene quantum dots (GQDs) of ∼5 nm diameter.

Fabrication of graphene quantum dots/chitosan composite film and its catalytic reduction for 4-nitrophenol

2019 ◽  
Vol 548 (1) ◽  
pp. 124-132
Author(s):  
Lansheng Wei ◽  
Jihai Cai ◽  
Xiaoyun Li ◽  
Xiaoying Wang
Keyword(s):  
Quantum Dots ◽  
Composite Film ◽  
Catalytic Reduction ◽  
Graphene Quantum Dots ◽  
Chitosan Composite

Electrochemistry and Electrocatalysis of Hemoglobin Based on Graphene Quantum Dots Modified Electrode

2020 ◽  
Vol 16 (3) ◽  
pp. 308-315
Author(s):  
Xiaoyan Li ◽  
Hui Xie ◽  
Guiling Luo ◽  
Yanyan Niu ◽  
Xiaobao Li ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Modified Electrode ◽  
Electrochemical Impedance ◽  
Ph Value ◽  
Catalytic Reduction ◽  
Graphene Quantum Dots ◽  
Phosphate Buffer Solution ◽  
Buffer Solution ◽  
Detection Range ◽  
Electrochemical Behaviors

Background: Graphene quantum dots (GQD) is a new member of carbon nanomaterial that has attracted increasing attention owing to its better chemical inertness, low cytotoxicity, large specific surface area, cheap cost, suitable conductivity and excellent biocompatibility. Methods: Electrochemical behaviors of this modified electrode were studied by cyclic voltammetry and electrochemical impedance spectroscopy. Electrochemical investigations of Nafion/Hb/GQD/ CILE were carried out with electrochemical parameters calculated. Results: In the phosphate buffer solution with a pH value of 5.0, good linear relationships between the catalytic reduction current and the concentration of substrate were got for TCA (6.0~100.0 mmol·L-1), NaNO2 (2.0~12.0 mmol·L-1) and H2O2 (6.0~30.0 mmol·L-1). The proposed method was applied to NaNO2 concentration detection in soak water from picked vegetables with satisfactory results. Conclusion: This Nafion/Hb/GQD/CILE had a good bioelectrocatalytic activity to different substrates such as trichloroacetic acid, NaNO2 and H2O2 reduction with the advantages including wide detection range, low detection limit and good stability. Therefore, the application of GQD in electrochemical sensor was extended in this paper.

Synthesis and applications of graphene quantum dots: a review

2018 ◽  
Vol 7 (2) ◽  
pp. 157-185 ◽  
Author(s):  
Weifeng Chen ◽  
Guo Lv ◽  
Weimin Hu ◽  
Dejiang Li ◽  
Shaona Chen ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Graphene Quantum Dots ◽  
Drug Carriers ◽  
Preparation Methods ◽  
New Class ◽  
Advantages And Disadvantages ◽  
Ultrasonic Assisted ◽  
Potential Applications ◽  
Bio Imaging ◽  
Novel Devices

AbstractAs a new class of fluorescent carbon materials, graphene quantum dots (GQDs) have attracted tremendous attention due to their outstanding properties and potential applications in biological, optoelectronic, and energy-related fields. Herein, top-down and bottom-up strategies for the fabrication of GQDs, mainly containing oxidative cleavage, the hydrothermal or solvothermal method, the ultrasonic-assisted or microwave-assisted process, electrochemical oxidation, controllable synthesis, and carbonization from small molecules or polymers, are discussed. Different methods are presented in order to study their characteristics and their influence on the final properties of the GQDs. The respective advantages and disadvantages of the methods are introduced. With regard to some important or novel methods, the mechanisms are proposed for reference. Moreover, recent exciting progresses on the applications of GQD, such as sensors, bio-imaging, drug carriers, and solar cells are highlighted. Finally, a brief outlook is given, pointing out the issues still to be settled for further development. We believe that new preparation methods and properties of GQDs will be found, and GQDs will play more important roles in novel devices and various applications.

scholarly journals Large-scale synthesis of defect-selective graphene quantum dots by ultrasonic-assisted liquid-phase exfoliation

Carbon ◽  
2016 ◽  
Vol 109 ◽  
pp. 373-383 ◽  
Author(s):  
Liqiang Lu ◽  
Yingchun Zhu ◽  
Chao Shi ◽  
Yutao T. Pei
Keyword(s):  
Quantum Dots ◽  
Liquid Phase ◽  
Large Scale ◽  
Graphene Quantum Dots ◽  
Ultrasonic Assisted ◽  
Liquid Phase Exfoliation ◽  
Large Scale Synthesis

Preparation of Graphene Quantum Dots and Their Biological Applications

2016 ◽  
Vol 31 (4) ◽  
pp. 337 ◽  
Author(s):  
SUN Xiao-Dan ◽  
LIU Zhong-Qun ◽  
YAN Hao
Keyword(s):  
Quantum Dots ◽  
Graphene Quantum Dots ◽  
Biological Applications

Effect of graphene quantum dots on intestinal imaging and mesenteric microcirculation in mice

2014 ◽  
Vol 35 (4) ◽  
pp. 372
Author(s):  
Yong-qiang MA ◽  
Zhen-guo WANG ◽  
Xue-li GOU ◽  
Na LI ◽  
Ya-qiang FENG ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Graphene Quantum Dots ◽  
Mesenteric Microcirculation

Targeted bioimaging and sensing of folate receptor-positive cancer cells using folic acid-conjugated sulfur-doped graphene quantum dots

2020 ◽  
Vol 187 (8) ◽  
Author(s):  
Sachin Kadian ◽  
Gaurav Manik ◽  
Neeladrisingha Das ◽  
Partha Roy
Keyword(s):  
Quantum Dots ◽  
Folic Acid ◽  
Cancer Cells ◽  
Folate Receptor ◽  
Graphene Quantum Dots ◽  
Doped Graphene
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