A facile one-step green synthesis of graphene by mild solvent exfoliation

Joanna Su Yuin Chia, Michelle T.T. Tan, Poi Sim Khiew, Jit Kai Chin, Chiu Wee Siong

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

The intriguing properties of graphene have led to wide explorations into scalable, reproducible methods of its bulk-scale production. This work expands upon the Hansen Solubility Parameters (HSP) theory to predict the lowest Ra distance in a particular solvent-water system for optimum exfoliation process. This simple, one-step facile synthesis is able to exfoliate graphene sheets from Highly Oriented Pyrolytic Graphite (HOPG), producing homogeneous dispersions of graphene sheets with average lateral dimensions of more than 2 μm and average thickness of <2 nm. This has provided a viable avenue for a single-step direct exfoliation of graphene in various solvent-water system. A range of solvents ranging from alcohol-water systems to mild acid-water systems were studied in order to prove the suitability of the HSP theory in predicting the efficiency of exfoliation in these solvent systems. Further studies on the effect of the Ra distance upon the degree of exfoliation were also demonstrated by studying the biosensing potential of the as-produced graphene sheets. Improvements in sensitivity by 10 to 80 times, depending on the lowest Ra value of a particular solvent system in comparison to the bare electrode, reinforced the hypothesis that the Ra value has impact on the exfoliation efficiency. These results show that by choosing solvent combinations with the lowest minimum Ra values, it is possible to further increase the efficiency of exfoliation, as reflected in higher sensitivities and faster amperometric responses. The proposed method is not only easy, low cost and low toxic, the ability to employ an unlimited number of solvent combinations opens up vast opportunities for future applications.

LanguageEnglish
Pages1177-1186
Number of pages10
JournalScience of Advanced Materials
Volume8
Issue number6
DOIs
Publication statusPublished - 1 Jun 2016
Externally publishedYes

Fingerprint

Graphite
Graphene
Water
Solubility
Poisons
Dispersions
Alcohols
Electrodes
Acids
Costs

Cite this

Chia, Joanna Su Yuin ; Tan, Michelle T.T. ; Khiew, Poi Sim ; Chin, Jit Kai ; Siong, Chiu Wee. / A facile one-step green synthesis of graphene by mild solvent exfoliation. In: Science of Advanced Materials. 2016 ; Vol. 8, No. 6. pp. 1177-1186.
@article{e005c33bf0d84099914f9cd95b6f77df,
title = "A facile one-step green synthesis of graphene by mild solvent exfoliation",
abstract = "The intriguing properties of graphene have led to wide explorations into scalable, reproducible methods of its bulk-scale production. This work expands upon the Hansen Solubility Parameters (HSP) theory to predict the lowest Ra distance in a particular solvent-water system for optimum exfoliation process. This simple, one-step facile synthesis is able to exfoliate graphene sheets from Highly Oriented Pyrolytic Graphite (HOPG), producing homogeneous dispersions of graphene sheets with average lateral dimensions of more than 2 μm and average thickness of <2 nm. This has provided a viable avenue for a single-step direct exfoliation of graphene in various solvent-water system. A range of solvents ranging from alcohol-water systems to mild acid-water systems were studied in order to prove the suitability of the HSP theory in predicting the efficiency of exfoliation in these solvent systems. Further studies on the effect of the Ra distance upon the degree of exfoliation were also demonstrated by studying the biosensing potential of the as-produced graphene sheets. Improvements in sensitivity by 10 to 80 times, depending on the lowest Ra value of a particular solvent system in comparison to the bare electrode, reinforced the hypothesis that the Ra value has impact on the exfoliation efficiency. These results show that by choosing solvent combinations with the lowest minimum Ra values, it is possible to further increase the efficiency of exfoliation, as reflected in higher sensitivities and faster amperometric responses. The proposed method is not only easy, low cost and low toxic, the ability to employ an unlimited number of solvent combinations opens up vast opportunities for future applications.",
keywords = "Amperometric sensing, Facile exfoliation, Few layered graphene, Graphene synthesis, Hansen solubility parameters, Liquid exfoliation",
author = "Chia, {Joanna Su Yuin} and Tan, {Michelle T.T.} and Khiew, {Poi Sim} and Chin, {Jit Kai} and Siong, {Chiu Wee}",
year = "2016",
month = "6",
day = "1",
doi = "10.1166/sam.2016.2702",
language = "English",
volume = "8",
pages = "1177--1186",
journal = "Science of Advanced Materials",
issn = "1947-2935",
publisher = "American Scientific Publishers",
number = "6",

}

A facile one-step green synthesis of graphene by mild solvent exfoliation. / Chia, Joanna Su Yuin; Tan, Michelle T.T.; Khiew, Poi Sim; Chin, Jit Kai; Siong, Chiu Wee.

In: Science of Advanced Materials, Vol. 8, No. 6, 01.06.2016, p. 1177-1186.

Research output: Contribution to journalArticle

TY - JOUR

T1 - A facile one-step green synthesis of graphene by mild solvent exfoliation

AU - Chia, Joanna Su Yuin

AU - Tan, Michelle T.T.

AU - Khiew, Poi Sim

AU - Chin, Jit Kai

AU - Siong, Chiu Wee

PY - 2016/6/1

Y1 - 2016/6/1

N2 - The intriguing properties of graphene have led to wide explorations into scalable, reproducible methods of its bulk-scale production. This work expands upon the Hansen Solubility Parameters (HSP) theory to predict the lowest Ra distance in a particular solvent-water system for optimum exfoliation process. This simple, one-step facile synthesis is able to exfoliate graphene sheets from Highly Oriented Pyrolytic Graphite (HOPG), producing homogeneous dispersions of graphene sheets with average lateral dimensions of more than 2 μm and average thickness of <2 nm. This has provided a viable avenue for a single-step direct exfoliation of graphene in various solvent-water system. A range of solvents ranging from alcohol-water systems to mild acid-water systems were studied in order to prove the suitability of the HSP theory in predicting the efficiency of exfoliation in these solvent systems. Further studies on the effect of the Ra distance upon the degree of exfoliation were also demonstrated by studying the biosensing potential of the as-produced graphene sheets. Improvements in sensitivity by 10 to 80 times, depending on the lowest Ra value of a particular solvent system in comparison to the bare electrode, reinforced the hypothesis that the Ra value has impact on the exfoliation efficiency. These results show that by choosing solvent combinations with the lowest minimum Ra values, it is possible to further increase the efficiency of exfoliation, as reflected in higher sensitivities and faster amperometric responses. The proposed method is not only easy, low cost and low toxic, the ability to employ an unlimited number of solvent combinations opens up vast opportunities for future applications.

AB - The intriguing properties of graphene have led to wide explorations into scalable, reproducible methods of its bulk-scale production. This work expands upon the Hansen Solubility Parameters (HSP) theory to predict the lowest Ra distance in a particular solvent-water system for optimum exfoliation process. This simple, one-step facile synthesis is able to exfoliate graphene sheets from Highly Oriented Pyrolytic Graphite (HOPG), producing homogeneous dispersions of graphene sheets with average lateral dimensions of more than 2 μm and average thickness of <2 nm. This has provided a viable avenue for a single-step direct exfoliation of graphene in various solvent-water system. A range of solvents ranging from alcohol-water systems to mild acid-water systems were studied in order to prove the suitability of the HSP theory in predicting the efficiency of exfoliation in these solvent systems. Further studies on the effect of the Ra distance upon the degree of exfoliation were also demonstrated by studying the biosensing potential of the as-produced graphene sheets. Improvements in sensitivity by 10 to 80 times, depending on the lowest Ra value of a particular solvent system in comparison to the bare electrode, reinforced the hypothesis that the Ra value has impact on the exfoliation efficiency. These results show that by choosing solvent combinations with the lowest minimum Ra values, it is possible to further increase the efficiency of exfoliation, as reflected in higher sensitivities and faster amperometric responses. The proposed method is not only easy, low cost and low toxic, the ability to employ an unlimited number of solvent combinations opens up vast opportunities for future applications.

KW - Amperometric sensing

KW - Facile exfoliation

KW - Few layered graphene

KW - Graphene synthesis

KW - Hansen solubility parameters

KW - Liquid exfoliation

UR - http://www.scopus.com/inward/record.url?scp=84973158735&partnerID=8YFLogxK

U2 - 10.1166/sam.2016.2702

DO - 10.1166/sam.2016.2702

M3 - Article

VL - 8

SP - 1177

EP - 1186

JO - Science of Advanced Materials

T2 - Science of Advanced Materials

JF - Science of Advanced Materials

SN - 1947-2935

IS - 6

ER -