Solvothermal Fabrication of NiO/Co 3 O 4 Spherical Composites Modified with N‐Doped Graphene Quantum Dots as a Catalyst in the Microwave‐Assisted Synthesis of Spiro[diindenopyridine‐indoline] Triones

2021 ◽  
Vol 6 (32) ◽  
pp. 8402-8410
Author(s):  
Javad Safaei‐Ghomi ◽  
Pouria Babaei ◽  
Zahra Elyasi
Keyword(s):  
Quantum Dots ◽  
Graphene Quantum Dots ◽  
Microwave Assisted Synthesis ◽  
Microwave Assisted ◽  
Doped Graphene

scholarly journals Ultrafast ammonia-driven, microwave-assisted synthesis of nitrogen-doped graphene quantum dots and their optical properties

Nanophotonics ◽  
2017 ◽  
Vol 6 (1) ◽  
pp. 259-267 ◽  
Author(s):  
Binjie Zheng ◽  
Yuanfu Chen ◽  
Pingjian Li ◽  
Zegao Wang ◽  
Bingqiang Cao ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Optical Properties ◽  
Graphene Quantum Dots ◽  
Microwave Assisted Synthesis ◽  
Scale Production ◽  
Excitation Spectra ◽  
Nitrogen Doped ◽  
Microwave Assisted ◽  
Nitrogen Doped Graphene ◽  
Doped Graphene

AbstractFor the first time, a facile, ultrafast, ammonia-driven microwave-assisted synthesis of high-quality nitrogen-doped graphene quantum dots (NGQDs) at room temperature and atmospheric pressure is presented. This one-step method is very cheap, environment friendly, and suitable for large-scale production. The as-synthesized NGQDs consisting of one to three graphene monolayers exhibit highly crystalline quality with an average size of 5.3 nm. A new fluorescence (FL) emission peak at 390 nm is observed, which might be attributed to the doped nitrogen atoms into the GQDs. An interesting red-shift is observed by comparing the FL excitation spectra to the UV-visible absorption spectra. Based on the optical properties, the detailed Jablonski diagram representing the energy level structure of NGQDs is derived.

scholarly journals Engineered N-doped graphene quantum dots/CoFe2O4 spherical composites as a robust and retrievable catalyst: fabrication, characterization, and catalytic performance investigation in microwave-assisted synthesis of quinoline-3-carbonitrile derivatives

RSC Advances ◽  
2021 ◽  
Vol 11 (55) ◽  
pp. 34724-34734
Author(s):  
Pouria Babaei ◽  
Javad Safaei-Ghomi
Keyword(s):  
Quantum Dots ◽  
Graphene Quantum Dots ◽  
Catalytic Performance ◽  
Microwave Assisted Synthesis ◽  
Microwave Assisted ◽  
Doped Graphene

Sustainable fabrication of spherical N-GQDs/CoFe2O4 nanocomposites as a novel magnetically retrievable catalyst for the synthesis of quinoline-3-carbonitrile derivatives has been developed.

Transforming glucose into fluorescent graphene quantum dots via microwave radiation for sensitive detection of Al3+ ions based on aggregation-induced enhanced emission

The Analyst ◽  
2020 ◽  
Vol 145 (21) ◽  
pp. 6981-6986 ◽  
Author(s):  
Maomao Yao ◽  
Jinkun Huang ◽  
Zihao Deng ◽  
Wenying Jin ◽  
Yali Yuan ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Microwave Radiation ◽  
Fluorescence Detection ◽  
Graphene Quantum Dots ◽  
Sensitive Detection ◽  
Microwave Assisted Synthesis ◽  
Microwave Assisted

This work initially describes the microwave-assisted synthesis of graphene quantum dots (GQDs) for fluorescence detection of Al3+ ions based on the analyte-mediated aggregation of GQDs leading to aggregation-induced enhanced emission (AIEE).

scholarly journals Tailoring fluorescence emissions, quantum yields, and white light emitting from nitrogen-doped graphene and carbon nitride quantum dots

Nanoscale ◽  
2019 ◽  
Vol 11 (35) ◽  
pp. 16553-16561 ◽  
Author(s):  
Siyong Gu ◽  
Chien-Te Hsieh ◽  
Yasser Ashraf Gandomi ◽  
Jianlin Li ◽  
Xing Xing Yue ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Carbon Nitride ◽  
Solid Phase ◽  
Graphene Quantum Dots ◽  
Quantum Yields ◽  
Light Emitting ◽  
Nitrogen Doped ◽  
Microwave Assisted ◽  
Nitrogen Doped Graphene ◽  
Doped Graphene

Highly fluorescent N-doped graphene quantum dots (NGQDs) and graphitic carbon nitride quantum dots (CNQDs, g-C3N4) were synthesized using a solid-phase microwave-assisted (SPMA) technique.

Graphene quantum dot-decorated carbon electrodes for energy storage in vanadium redox flow batteries

Nanoscale ◽  
2020 ◽  
Vol 12 (14) ◽  
pp. 7834-7842 ◽  
Author(s):  
Michael C. Daugherty ◽  
Siyong Gu ◽  
Doug S. Aaron ◽  
Ryan E. Kelly ◽  
Yasser Ashraf Gandomi ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Carbon Nitride ◽  
Solid Phase ◽  
Graphene Quantum Dots ◽  
Carbon Electrodes ◽  
Graphene Quantum Dot ◽  
Microwave Assisted ◽  
Nitrogen Doped Graphene ◽  
Doped Graphene ◽  
Vanadium Redox

Nitrogen-doped graphene quantum dots (GQDs) and graphitic carbon nitride (g-C3N4) quantum dots are synthesized via a solid-phase microwave-assisted (SPMA) technique.

Microwave-Assisted Synthesis of Nitrogen-Doped Multi-Layer Graphene Quantum Dots with Oxygen-Rich Functional Groups

2016 ◽  
Vol 69 (3) ◽  
pp. 357 ◽  
Author(s):  
Xiaobei Hou ◽  
Yibing Li ◽  
Chuan Zhao
Keyword(s):  
Quantum Dots ◽  
Functional Groups ◽  
Graphene Quantum Dots ◽  
Atomic Ratio ◽  
Microwave Assisted Synthesis ◽  
Graphene Layers ◽  
Nitrogen Doped ◽  
Microwave Assisted ◽  
Layer Graphene ◽  
Potential Applications

Strong green-luminescent nitrogen-doped multi-layer graphene quantum dots (N-GQDs) have been prepared via a microwave-assisted hydrothermal method using glucose and urea as the starting materials. The fabricated N-GQDs show a highly crystalline structure and consist of ~3–10 graphene layers with an N/C atomic ratio 5.7 %. The wavelength-dependent luminescence emission behaviour is observed with a photoluminescence quantum yield of 5.2 %. The combination of the unique optical properties introduced by nitrogen doping with the high solubility in aqueous medium offered by the surface oxygen-rich functional groups in N-GQDs provides additional advantages for their potential applications in biolabelling and bioimaging.

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