Bandgap engineering of coal-derived graphene quantum dots

ACS Applied Materials & Interfaces
Ruquan YeJames M Tour

Abstract

Bandgaps of photoluminescent graphene quantum dots (GQDs) synthesized from anthracite have been engineered by controlling the size of GQDs in two ways: either chemical oxidative treatment and separation by cross-flow ultrafiltration, or by a facile one-step chemical synthesis using successively higher temperatures to render smaller GQDs. Using these methods, GQDs were synthesized with tailored sizes and bandgaps. The GQDs emit light from blue-green (2.9 eV) to orange-red (2.05 eV), depending on size, functionalities and defects. These findings provide a deeper insight into the nature of coal-derived GQDs and demonstrate a scalable method for production of GQDs with the desired bandgaps.

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Citations

Nov 10, 2015·ACS Applied Materials & Interfaces·Anton KovalchukJames M Tour
Oct 10, 2015·ACS Applied Materials & Interfaces·Kazuto HatakeyamaYasumichi Matsumoto
Oct 24, 2015·Luminescence : the Journal of Biological and Chemical Luminescence·Chan Jin JeongSung Young Park
Apr 5, 2016·Advanced Materials·Hiroyuki TetsukaTakayuki Matsui
Aug 28, 2015·ACS Applied Materials & Interfaces·Erhan ZorArben Merkoçi
Apr 14, 2016·Physical Chemistry Chemical Physics : PCCP·Senthil Kumar ThiyagarajanPerumal Ramamurthy
Jul 16, 2016·Luminescence : the Journal of Biological and Chemical Luminescence·Larry J KrickaJason Y Park
Aug 2, 2016·Physical Chemistry Chemical Physics : PCCP·S R M SantiagoC A J Lin
Apr 12, 2018·Chemical Communications : Chem Comm·Meredith McDowellAngel A Martí
Sep 13, 2017·Chemical Communications : Chem Comm·Ya ZhouXiaogang Qu
Feb 27, 2019·Chemical Communications : Chem Comm·Tobias ScharlDirk M Guldi
Jul 30, 2020·Soft Matter·Kaylee M ClarkCarlos D Garcia
Aug 6, 2019·Advanced Science·Qingsong MeiZhongping Zhang
Aug 28, 2017·Journal of Materials Chemistry. B, Materials for Biology and Medicine·Daniela IannazzoAlessandro Pistone
Oct 13, 2020·Journal of Photochemistry and Photobiology. B, Biology·Saikat PaulAnup K Ghosh
Apr 24, 2021·Luminescence : the Journal of Biological and Chemical Luminescence·Şifa KirRamazan Esen
Jul 4, 2019·ACS Sensors·Meixiu LiJingquan Liu
Jun 19, 2021·ACS Applied Nano Materials·Lisandro CunciCarlos R Cabrera
Apr 18, 2019·ACS Applied Materials & Interfaces·Lizanne NilewskiJames M Tour
Oct 4, 2021·Comprehensive Reviews in Food Science and Food Safety·Arumugam Selva SharmaQuansheng Chen

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