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.

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.

Three Minute Ultrarapid Microwave-Assisted Synthesis of Bright Fluorescent Graphene Quantum Dots for Live Cell Staining and White LEDs

2018 ◽  
Vol 1 (4) ◽  
pp. 1623-1630 ◽  
Author(s):  
Weitao Li ◽  
Ming Li ◽  
Yijian Liu ◽  
Dengyu Pan ◽  
Zhen Li ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Graphene Quantum Dots ◽  
Live Cell ◽  
Microwave Assisted Synthesis ◽  
White Leds ◽  
Microwave Assisted ◽  
Cell Staining

Fabrication of graphene oxide decorated with nitrogen-doped graphene quantum dots and its enhanced electrochemiluminescence for ultrasensitive detection of pentachlorophenol

The Analyst ◽  
2015 ◽  
Vol 140 (4) ◽  
pp. 1253-1259 ◽  
Author(s):  
Xiaojiao Du ◽  
Ding Jiang ◽  
Qian Liu ◽  
Gangbing Zhu ◽  
Hanping Mao ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Graphene Oxide ◽  
Electrocatalytic Activity ◽  
Graphene Quantum Dots ◽  
Ultrasensitive Detection ◽  
Nitrogen Doped ◽  
New Class ◽  
Potential Applications ◽  
Nitrogen Doped Graphene ◽  
Doped Graphene

Nitrogen-doped graphene quantum dots, as a new class of quantum dots, have potential applications in fuel cells and optoelectronics fields due to their electrocatalytic activity, tunable luminescence and biocompatibility.

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.

Nitrogen-Doped Graphene Quantum Dots with Oxygen-Rich Functional Groups

2011 ◽  
Vol 134 (1) ◽  
pp. 15-18 ◽  
Author(s):  
Yan Li ◽  
Yang Zhao ◽  
Huhu Cheng ◽  
Yue Hu ◽  
Gaoquan Shi ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Functional Groups ◽  
Graphene Quantum Dots ◽  
Nitrogen Doped ◽  
Nitrogen Doped Graphene ◽  
Doped Graphene

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.

Hybrid dye sensitized solar cell based on single layer graphene quantum dots

2020 ◽  
Vol 175 ◽  
pp. 108118 ◽  
Author(s):  
Farhad Jahantigh ◽  
S.M. Bagher Ghorashi ◽  
Amir Bayat
Keyword(s):  
Quantum Dots ◽  
Solar Cell ◽  
Graphene Quantum Dots ◽  
Single Layer ◽  
Single Layer Graphene ◽  
Dye Sensitized Solar Cell ◽  
Dye Sensitized ◽  
Layer Graphene
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