Bandgap Engineering of Coal-Derived Graphene Quantum Dots

Ruquan Ye; Zhiwei Peng; Andrew Metzger; Jian Lin; Jason A. Mann; Kewei Huang; Changsheng Xiang; Xiujun Fan; Errol L. G. Samuel; Lawrence B. Alemany; Angel A. Martí; James M. Tour

doi:10.1021/acsami.5b01419

Bandgap Engineering of Coal-Derived Graphene Quantum Dots

Ruquan Ye, Zhiwei Peng, Andrew Metzger, Jian Lin, Jason A. Mann, Kewei Huang, Changsheng Xiang, Xiujun Fan, Errol L. G. Samuel, Lawrence B. Alemany, Angel A. Martí^*, James M. Tour^*

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

221 Citations (Scopus)

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.

Original language	English
Pages (from-to)	7041-7048
Journal	ACS Applied Materials and Interfaces
Volume	7
Issue number	12
Online published	10 Mar 2015
DOIs	https://doi.org/10.1021/acsami.5b01419
Publication status	Published - 1 Apr 2015
Externally published	Yes

Research Keywords

anthracite
bandgap
cross-flow filtration
graphene quantum dots
photoluminescent

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10.1021/acsami.5b01419

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@article{07c5a8a4d9a24f2da0e4edf71f73cb00,

title = "Bandgap Engineering of Coal-Derived Graphene Quantum Dots",

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.",

keywords = "anthracite, bandgap, cross-flow filtration, graphene quantum dots, photoluminescent",

author = "Ruquan Ye and Zhiwei Peng and Andrew Metzger and Jian Lin and Mann, {Jason A.} and Kewei Huang and Changsheng Xiang and Xiujun Fan and Samuel, {Errol L. G.} and Alemany, {Lawrence B.} and Mart{\'i}, {Angel A.} and Tour, {James M.}",

year = "2015",

month = apr,

day = "1",

doi = "10.1021/acsami.5b01419",

language = "English",

volume = "7",

pages = "7041--7048",

journal = "ACS Applied Materials and Interfaces",

issn = "1944-8244",

publisher = "American Chemical Society",

number = "12",

}

TY - JOUR

T1 - Bandgap Engineering of Coal-Derived Graphene Quantum Dots

AU - Ye, Ruquan

AU - Peng, Zhiwei

AU - Metzger, Andrew

AU - Lin, Jian

AU - Mann, Jason A.

AU - Huang, Kewei

AU - Xiang, Changsheng

AU - Fan, Xiujun

AU - Samuel, Errol L. G.

AU - Alemany, Lawrence B.

AU - Martí, Angel A.

AU - Tour, James M.

PY - 2015/4/1

Y1 - 2015/4/1

N2 - 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.

AB - 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.

KW - anthracite

KW - bandgap

KW - cross-flow filtration

KW - graphene quantum dots

KW - photoluminescent

UR - http://www.scopus.com/inward/record.url?scp=84926319265&partnerID=8YFLogxK

UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-84926319265&origin=recordpage

U2 - 10.1021/acsami.5b01419

DO - 10.1021/acsami.5b01419

M3 - RGC 21 - Publication in refereed journal

AN - SCOPUS:84926319265

SN - 1944-8244

VL - 7

SP - 7041

EP - 7048

JO - ACS Applied Materials and Interfaces

JF - ACS Applied Materials and Interfaces

IS - 12

ER -

Bandgap Engineering of Coal-Derived Graphene Quantum Dots

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Research Keywords

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