Light and Atmosphere Affect the Quasi-equilibrium States of Graphite Oxide and Graphene Oxide Powders

Chun Kiang Chua, Martin Pumera

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

Graphite oxide (GiO) and graphene oxide (GeO) possess wide applicability in technological devices. The exact chemical compositions, structures, and properties of these materials remain vague to the graphene community despite being heavily researched. As metastable materials, the properties of GiO and GeO are easily manipulated under various conditions of temperature, light, and atmosphere. Although these aspects are important considerations for long-term storage of the materials, they are not well understood. In this experimental work, investigations are performed to determine how light and atmosphere contribute to the characteristics of GiO and GeO powders. The study shows that, at room-temperature, the quasi-equilibrium states of both materials, in specific the O/C ratios, vary according to the storage conditions. Drastic disparities between GiO and GeO are observed. GiO kept away from light and GeO kept under inert atmosphere maintain relatively high O/C ratios. As the metastable states of the materials are governed by the diffusion of oxygen functionalities, the presence of epoxide groups diminishes while negligible changes occur to the sp2 lattice size. This experimental work lays out fundamental aspects that govern the stability of frequently mass-produced GiO and GeO powders under different environments, with major implications on their optimal storage conditions.

Original languageEnglish
Pages (from-to)1266-1272
Number of pages7
JournalSmall
Volume11
Issue number11
DOIs
Publication statusPublished - 2015 Mar 18

Fingerprint

Graphite
Atmosphere
Powders
Oxides
Graphene
Light
Temperature
Epoxy Compounds

All Science Journal Classification (ASJC) codes

  • Biotechnology
  • Biomaterials
  • Chemistry(all)
  • Materials Science(all)
  • Engineering (miscellaneous)

Cite this

@article{79ac254398274b278f32a2b7507477d4,
title = "Light and Atmosphere Affect the Quasi-equilibrium States of Graphite Oxide and Graphene Oxide Powders",
abstract = "Graphite oxide (GiO) and graphene oxide (GeO) possess wide applicability in technological devices. The exact chemical compositions, structures, and properties of these materials remain vague to the graphene community despite being heavily researched. As metastable materials, the properties of GiO and GeO are easily manipulated under various conditions of temperature, light, and atmosphere. Although these aspects are important considerations for long-term storage of the materials, they are not well understood. In this experimental work, investigations are performed to determine how light and atmosphere contribute to the characteristics of GiO and GeO powders. The study shows that, at room-temperature, the quasi-equilibrium states of both materials, in specific the O/C ratios, vary according to the storage conditions. Drastic disparities between GiO and GeO are observed. GiO kept away from light and GeO kept under inert atmosphere maintain relatively high O/C ratios. As the metastable states of the materials are governed by the diffusion of oxygen functionalities, the presence of epoxide groups diminishes while negligible changes occur to the sp2 lattice size. This experimental work lays out fundamental aspects that govern the stability of frequently mass-produced GiO and GeO powders under different environments, with major implications on their optimal storage conditions.",
author = "Chua, {Chun Kiang} and Martin Pumera",
year = "2015",
month = "3",
day = "18",
doi = "10.1002/smll.201400154",
language = "English",
volume = "11",
pages = "1266--1272",
journal = "Small",
issn = "1613-6810",
publisher = "Wiley-VCH Verlag",
number = "11",

}

Light and Atmosphere Affect the Quasi-equilibrium States of Graphite Oxide and Graphene Oxide Powders. / Chua, Chun Kiang; Pumera, Martin.

In: Small, Vol. 11, No. 11, 18.03.2015, p. 1266-1272.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Light and Atmosphere Affect the Quasi-equilibrium States of Graphite Oxide and Graphene Oxide Powders

AU - Chua, Chun Kiang

AU - Pumera, Martin

PY - 2015/3/18

Y1 - 2015/3/18

N2 - Graphite oxide (GiO) and graphene oxide (GeO) possess wide applicability in technological devices. The exact chemical compositions, structures, and properties of these materials remain vague to the graphene community despite being heavily researched. As metastable materials, the properties of GiO and GeO are easily manipulated under various conditions of temperature, light, and atmosphere. Although these aspects are important considerations for long-term storage of the materials, they are not well understood. In this experimental work, investigations are performed to determine how light and atmosphere contribute to the characteristics of GiO and GeO powders. The study shows that, at room-temperature, the quasi-equilibrium states of both materials, in specific the O/C ratios, vary according to the storage conditions. Drastic disparities between GiO and GeO are observed. GiO kept away from light and GeO kept under inert atmosphere maintain relatively high O/C ratios. As the metastable states of the materials are governed by the diffusion of oxygen functionalities, the presence of epoxide groups diminishes while negligible changes occur to the sp2 lattice size. This experimental work lays out fundamental aspects that govern the stability of frequently mass-produced GiO and GeO powders under different environments, with major implications on their optimal storage conditions.

AB - Graphite oxide (GiO) and graphene oxide (GeO) possess wide applicability in technological devices. The exact chemical compositions, structures, and properties of these materials remain vague to the graphene community despite being heavily researched. As metastable materials, the properties of GiO and GeO are easily manipulated under various conditions of temperature, light, and atmosphere. Although these aspects are important considerations for long-term storage of the materials, they are not well understood. In this experimental work, investigations are performed to determine how light and atmosphere contribute to the characteristics of GiO and GeO powders. The study shows that, at room-temperature, the quasi-equilibrium states of both materials, in specific the O/C ratios, vary according to the storage conditions. Drastic disparities between GiO and GeO are observed. GiO kept away from light and GeO kept under inert atmosphere maintain relatively high O/C ratios. As the metastable states of the materials are governed by the diffusion of oxygen functionalities, the presence of epoxide groups diminishes while negligible changes occur to the sp2 lattice size. This experimental work lays out fundamental aspects that govern the stability of frequently mass-produced GiO and GeO powders under different environments, with major implications on their optimal storage conditions.

UR - http://www.scopus.com/inward/record.url?scp=84924758276&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84924758276&partnerID=8YFLogxK

U2 - 10.1002/smll.201400154

DO - 10.1002/smll.201400154

M3 - Article

VL - 11

SP - 1266

EP - 1272

JO - Small

JF - Small

SN - 1613-6810

IS - 11

ER -