NiAg-graphene quantum dot-graphene hybrid with high oxidase-like catalytic activity for sensitive colorimetric detection of malathion

2021 ◽  
Author(s):  
Xu Dan ◽  
Ruiyi Li ◽  
Qinsheng Wang ◽  
Yongqiang Yang ◽  
Haiyan Zhu ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Graphene Oxide ◽  
Catalytic Activity ◽  
Quantum Dot ◽  
Colorimetric Detection ◽  
Graphene Quantum Dots ◽  
Functionalized Graphene ◽  
Graphene Quantum Dot ◽  
Nickel Silver

The paper reports the synthesis of nickel-silver-graphene quantum dot-graphene hybrid. Histidine-functionalized graphene quantum dots (His-GQDs) were bonded to graphene oxide (GO) and then combined with Ni2+ and Ag+ to form...

scholarly journals Nanocomposite of hydrophobic cellulose aerogel/graphene quantum dot/Pd: synthesis, characterization, and catalytic application

RSC Advances ◽  
2019 ◽  
Vol 9 (30) ◽  
pp. 17129-17136 ◽  
Author(s):  
Sajjad Keshipour ◽  
Masoumeh Khezerloo
Keyword(s):  
Quantum Dots ◽  
Catalytic Activity ◽  
Quantum Dot ◽  
Graphene Quantum Dots ◽  
High Catalytic Activity ◽  
Graphene Quantum Dot ◽  
Cellulose Aerogel ◽  
Catalytic Application

Novel hydrophobic cellulose aerogel (CA) supported graphene quantum dots (GQD)/Pd were synthesized with high lipophilicity, superior porosity as well as high catalytic activity.

scholarly journals Effect of thiophene S on the enhanced ORR electrocatalytic performance of sulfur-doped graphene quantum dot/reduced graphene oxide nanocomposites

RSC Advances ◽  
2018 ◽  
Vol 8 (35) ◽  
pp. 19635-19641 ◽  
Author(s):  
Fei Li ◽  
Lang Sun ◽  
Yi Luo ◽  
Ming Li ◽  
Yongjie Xu ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Electron Transfer ◽  
Graphene Oxide ◽  
Quantum Dot ◽  
Reduced Graphene Oxide ◽  
Graphene Quantum Dots ◽  
Graphene Quantum Dot ◽  
Reduced Graphene ◽  
Doped Graphene ◽  
Transfer Numbers

Thiophene S of sulfur-doped graphene quantum dots play an important role in electrocatalysis by increasing the electron transfer numbers.

scholarly journals One-Step Synthesis of Diamine-Functionalized Graphene Quantum Dots from Graphene Oxide and Their Chelating and Antioxidant Activities

Nanomaterials ◽  
2020 ◽  
Vol 10 (1) ◽  
pp. 104 ◽  
Author(s):  
Rabeb El-Hnayn ◽  
Laetitia Canabady-Rochelle ◽  
Christophe Desmarets ◽  
Lavinia Balan ◽  
Hervé Rinnert ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Graphene Oxide ◽  
Colloidal Stability ◽  
Antioxidant Activities ◽  
Graphene Quantum Dots ◽  
Average Diameter ◽  
Functionalized Graphene ◽  
One Step ◽  
Low Cytotoxicity ◽  
Health Applications

2,2’-(Ethylenedioxy)bis(ethylamine)-functionalized graphene quantum dots (GQDs) were prepared under mild conditions from graphene oxide (GO) via oxidative fragmentation. The as-prepared GQDs have an average diameter of ca. 4 nm, possess good colloidal stability, and emit strong green-yellow light with a photoluminescence (PL) quantum yield of 22% upon excitation at 375 nm. We also demonstrated that the GQDs exhibit high photostability and the PL intensity is poorly affected while tuning the pH from 1 to 8. Finally, GQDs can be used to chelate Fe(II) and Cu(II) cations, scavenge radicals, and reduce Fe(III) into Fe(II). These chelating and reducing properties that associate to the low cytotoxicity of GQDs show that these nanoparticles are of high interest as antioxidants for health applications.

Graphene quantum dot based micromotors: a size matter

2019 ◽  
Vol 55 (47) ◽  
pp. 6795-6798 ◽  
Author(s):  
Roberto Maria-Hormigos ◽  
Beatriz Jurado-Sánchez ◽  
Alberto Escarpa
Keyword(s):  
Quantum Dots ◽  
Quantum Dot ◽  
Graphene Quantum Dots ◽  
Graphene Quantum Dot ◽  
Low Dimensional ◽  
Size Matter

Low dimensional 0D graphene quantum dots are used for the preparation of micromotors with higher yield compared to graphene micromotors.

scholarly journals Synthesis of graphene quantum dot-stabilized gold nanoparticles and their application

RSC Advances ◽  
2019 ◽  
Vol 9 (37) ◽  
pp. 21215-21219 ◽  
Author(s):  
Weifeng Chen ◽  
Jialu Shen ◽  
Shaona Chen ◽  
Jiaying Yan ◽  
Nuonuo Zhang ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Gold Nanoparticles ◽  
Quantum Dot ◽  
Graphene Quantum Dots ◽  
Graphene Quantum Dot

Herein, we report an in situ synthesis of graphene quantum dots (GQDs), which have been synthesized from only starch and water and stabilize AuNPs in water.

A review on graphene quantum dots and their nanocomposites: from laboratory synthesis towards agricultural and environmental applications

2020 ◽  
Vol 7 (12) ◽  
pp. 3710-3734
Author(s):  
Murilo H. M. Facure ◽  
Rodrigo Schneider ◽  
Luiza A. Mercante ◽  
Daniel S. Correa
Keyword(s):  
Quantum Dots ◽  
Quantum Dot ◽  
Graphene Quantum Dots ◽  
Environmental Applications ◽  
Graphene Quantum Dot ◽  
Laboratory Synthesis

This review highlights recent and important advances related to the synthesis, characterization and application of graphene quantum dot (GQD)-based nanocomposites for the agriculture and environmental sectors.

Photophysical properties and photodynamic therapy activity of ameso-tetra(4-carboxyphenyl)porphyrin tetramethyl ester–graphene quantum dot conjugate

2019 ◽  
Vol 43 (11) ◽  
pp. 4518-4524 ◽  
Author(s):  
Muthumuni Managa ◽  
Bokolombe Pitchou Ngoy ◽  
Tebello Nyokong
Keyword(s):  
Quantum Dots ◽  
Photodynamic Therapy ◽  
Quantum Dot ◽  
Photophysical Properties ◽  
Graphene Quantum Dots ◽  
Graphene Quantum Dot

Ameso-tetra(4-carboxyphenyl)porphyrin tetramethyl ester and the Zn and GaCl derivatives were π–π stacked with graphene quantum dots to form conjugates and their photophysical and photodynamic therapy properties were investigated.

Graphene quantum dot induced tunable growth of nanostructured MnCo2O4.5 composites for high-performance supercapacitors

2019 ◽  
Vol 3 (9) ◽  
pp. 2499-2508 ◽  
Author(s):  
Maiwen Zhang ◽  
Wenwen Liu ◽  
Ruilin Liang ◽  
Ricky Tjandra ◽  
Aiping Yu
Keyword(s):  
Quantum Dots ◽  
Quantum Dot ◽  
Electrochemical Performance ◽  
High Performance ◽  
Graphene Quantum Dots ◽  
Graphene Quantum Dot ◽  
Supercapacitor Applications

A method that adapts graphene quantum dots (GQDs) as structural inducing agents to tune the morphology of MnCo2O4.5/GQDs composites is developed, and utilized to enhance their electrochemical performance for supercapacitor applications.

Selective oxidation of veratryl alcohol with composites of Au nanoparticles and graphene quantum dots as catalysts

2015 ◽  
Vol 51 (29) ◽  
pp. 6318-6321 ◽  
Author(s):  
Xiaochen Wu ◽  
Shouwu Guo ◽  
Jingyan Zhang
Keyword(s):  
Quantum Dots ◽  
Quantum Dot ◽  
Selective Oxidation ◽  
Au Nanoparticles ◽  
Graphene Quantum Dots ◽  
Veratryl Alcohol ◽  
Veratric Acid ◽  
Graphene Quantum Dot ◽  
Efficient Conversion ◽  
Excellent Selectivity

Veratryl alcohol can be oxidized to veratryl aldehyde or veratric acid with excellent selectivity and efficient conversion using Au and graphene quantum dot composites (Au/GQDs) as catalysts.

Steering graphene quantum dots in living cells: lighting up the nucleolus

2016 ◽  
Vol 4 (4) ◽  
pp. 779-784 ◽  
Author(s):  
Xiaojuan Wang ◽  
Yanan Wang ◽  
Hua He ◽  
Xin Chen ◽  
Xing Sun ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Quantum Dot ◽  
Graphene Quantum Dots ◽  
Living Cells ◽  
Graphene Quantum Dot

A novel graphene quantum dot capable of lighting up the nucleoli of living cells has been developed.

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