Creating high yield water soluble luminescent graphene quantum dots via exfoliating and disintegrating carbon nanotubes and graphite flakes

2012 ◽  
Vol 48 (82) ◽  
pp. 10177 ◽  
Author(s):  
Liangxu Lin ◽  
Shaowei Zhang
Keyword(s):  
Carbon Nanotubes ◽  
Quantum Dots ◽  
Graphene Quantum Dots ◽  
Water Soluble ◽  
High Yield

Interfacial enhancement effect of graphene quantum dots on PEDOT:PSS/single-walled carbon nanotubes thermoelectric materials

2021 ◽  
Vol 280 ◽  
pp. 116861
Author(s):  
Ping Fu ◽  
Jin-Kun Xiao ◽  
Jia-Zhi Gong ◽  
Ying Zhu ◽  
Jun-An Yao ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Quantum Dots ◽  
Thermoelectric Materials ◽  
Graphene Quantum Dots ◽  
Single Walled Carbon Nanotubes ◽  
Enhancement Effect ◽  
Single Walled Carbon ◽  
Walled Carbon Nanotubes

scholarly journals Green Preparation of High Yield Fluorescent Graphene Quantum Dots from Coal-Tar-Pitch by Mild Oxidation

Nanomaterials ◽  
2018 ◽  
Vol 8 (10) ◽  
pp. 844 ◽  
Author(s):  
Quanrun Liu ◽  
Jingjie Zhang ◽  
He He ◽  
Guangxu Huang ◽  
Baolin Xing ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Coal Tar ◽  
Graphene Quantum Dots ◽  
High Yield ◽  
Coal Tar Pitch ◽  
Narrow Size Distribution ◽  
Material Source ◽  
Graphene Layers ◽  
Mild Conditions ◽  
Simple Strategy

Coal tar pitch (CTP), a by-product of coking industry, has a unique molecule structure comprising an aromatic nucleus and several side chains bonding on this graphene-like nucleus, which is very similar to the structure of graphene quantum dots (GQDs). Based on this perception, we develop a facile approach to convert CTP to GQDs only by oxidation with hydrogen peroxide under mild conditions. One to three graphene layers, monodisperse GQDs with a narrow size distribution of 1.7 ± 0.4 nm, are obtained at high yield (more than 80 wt. %) from CTP. The as-produced GQDs are highly soluble and strongly fluorescent in aqueous solution. This simple strategy provides a feasible route towards the commercial synthesis of GQDs for its cheap material source, green reagent, mild condition, and high yield.

scholarly journals Graphene quantum dots based on maltose as a high yield photocatalyst for efficient photodegradation of imipramine in wastewater samples

2020 ◽  
Vol 18 (2) ◽  
pp. 1531-1540
Author(s):  
Raheleh Hatefi ◽  
Ali Mashinchian-Moradi ◽  
Habibollah Younesi ◽  
Saeed Nojavan
Keyword(s):  
Quantum Dots ◽  
Graphene Quantum Dots ◽  
High Yield ◽  
Wastewater Samples

Electrochemical sensor for detecting dopamine using graphene quantum dots incorporated with multiwall carbon nanotubes

2020 ◽  
Vol 508 ◽  
pp. 145294 ◽  
Author(s):  
Shiva Kumar Arumugasamy ◽  
Saravanan Govindaraju ◽  
Kyusik Yun
Keyword(s):  
Carbon Nanotubes ◽  
Quantum Dots ◽  
Electrochemical Sensor ◽  
Graphene Quantum Dots ◽  
Multiwall Carbon Nanotubes ◽  
Multiwall Carbon

scholarly journals High yield synthesis of graphene quantum dots from biomass waste as a highly selective probe for Fe3+ sensing

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Aumber Abbas ◽  
Tanveer A. Tabish ◽  
Steve J. Bull ◽  
Tuti Mariana Lim ◽  
Anh N. Phan
Keyword(s):  
Quantum Dots ◽  
Optical Properties ◽  
Low Cost ◽  
Graphene Quantum Dots ◽  
Cost Effective ◽  
Renewable Resource ◽  
Microwave Treatment ◽  
High Yield ◽  
Biomass Waste ◽  
Practical Applications

AbstractGraphene quantum dots (GQDs), a novel type of zero-dimensional fluorescent materials, have gained considerable attention owing to their unique optical properties, size and quantum confinement. However, their high cost and low yield remain open challenges for practical applications. In this work, a low cost, green and renewable biomass resource is utilised for the high yield synthesis of GQDs via microwave treatment. The synthesis approach involves oxidative cutting of short range ordered carbon derived from pyrolysis of biomass waste. The GQDs are successfully synthesised with a high yield of over 84%, the highest value reported to date for biomass derived GQDs. As prepared GQDs are highly hydrophilic and exhibit unique excitation independent photoluminescence emission, attributed to their single-emission fluorescence centre. As prepared GQDs are further modified by simple hydrothermal treatment and exhibit pronounced optical properties with a high quantum yield of 0.23. These modified GQDs are used for the highly selective and sensitive sensing of ferric ions (Fe3+). A sensitive sensor is prepared for the selective detection of Fe3+ ions with a detection limit of as low as 2.5 × 10–6 M. The utilisation of renewable resource along with facile microwave treatment paves the way to sustainable, high yield and cost-effective synthesis of GQDs for practical applications.

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