Thermal reduction of graphene oxide: How temperature influences purity

Among various methods used for the reduction of graphene oxide (GO) into a purer form of graphene, the thermal reduction method provides a simpler, safer, and economic alternative, compared to other techniques. Thermal reduction of GO causes significant weight loss and volume expansion of the materi...

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Bibliographic Details
Published in:Journal of materials research Vol. 33; no. 23; pp. 4113 - 4122
Main Authors: Sengupta, Iman, Chakraborty, Samarshi, Talukdar, Monikangkana, Pal, Surjya K., Chakraborty, Sudipto
Format: Journal Article
Language:English
Published: New York, USA Cambridge University Press 14.12.2018
Springer International Publishing
Springer Nature B.V
Subjects:
Annealing
Applied and Technical Physics
Atmospheric pressure
Biomaterials
Carbon
Chemical vapor deposition
Crystal defects
Defects
Fourier transforms
Graphene
Graphite
Infrared analysis
Inorganic Chemistry
Materials Engineering
Materials research
Materials Science
Microwave heating
Nanocomposites
Nanotechnology
Physical properties
Potassium
Reaction kinetics
Researchers
Sulfuric acid
Temperature
Thermal degradation
Thermal reduction
Thermogravimetric analysis
Weight loss
nanoscale
thermogravimetric analysis (TGA)
C
ISSN:0884-2914, 2044-5326
Online Access:Get full text
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Summary:Among various methods used for the reduction of graphene oxide (GO) into a purer form of graphene, the thermal reduction method provides a simpler, safer, and economic alternative, compared to other techniques. Thermal reduction of GO causes significant weight loss and volume expansion of the material. Current work investigates the onset temperature where reduction in terms of exfoliation takes place, which is determined to be 325 °C at standard atmospheric pressure. Reduction temperature plays the most crucial role as it controls the quality of reduced graphene oxide in terms of weight percentage of carbon and lattice defect. The study leads to achieving highest content with a minimum defect in the graphene lattice at the optimum temperature, which is found to be 350 °C at standard atmospheric pressure. The thermal reduction process has been analyzed with the help of Fourier transform infrared spectroscopy, thermogravimetric analysis, and thermal degradation kinetics. From thermal degradation kinetics of GO, the rate of reaction has been found to be independent of concentration and is a sole function of temperature.
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ISSN:0884-2914
2044-5326
DOI:10.1557/jmr.2018.338