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Journal of Biotechnology and Phytochemistry

Volume 1, Issue 2

Notes:

Plasma Chemistry 2017

November 13-14, 2017 Paris, France

International Conference on

PLASMA CHEMISTRY AND

PLASMA PROCESSING

María Dolores Calzada, J Biot Phyt 2017

High-quality graphene production from ethanol

decomposition using a microwave plasma

torch

raphene is a perfect two-dimensional material

with important electrical, mechanical and chemical

properties that make this material suitable for a

wide range of applications in different scientific and

technological fields. Thus, it has been successfully used

for manufacturing solar cells or as support for catalysts

in the electrodes of fuel cells. Conventional methods as

Chemical vapour deposition (CVD) and Liquid phase

exfoliation (LPE) have both been applied for graphene

production at industrial level. However, microwave

plasmas have been reported as efficient, clean, eco-

friendly and scalable technology for this purpose using

alcohols as precursors. Microwave plasma torches

have demonstrated the capability to dissociate the

molecules introduced into the discharge, giving place

to atoms and radicals. These species can recombine

at the plasma exit forming different products to those

used as precursors. In microwave plasma torches, the

reactions in which the plasma species are involved

depend on plasma parameters such as densities and

temperatures, whose values can be modified acting on

operational conditions used to create and maintain the

plasma, thus offering an important degree of control

over the final products. Besides, non-intrusive emission

spectroscopy techniques can be used to identify the

species and radicals formed into the plasma during

the precursor decomposition. This fact contributes to

understanding the key factors for graphene synthesis

using plasma technology. A microwave plasma torch,

so-called TIAGO (Torche à Injection Axiale sur Guide

d’Ondes), has been used to obtain high-quality graphene

2-7 layers utilizing Ar and ethanol as carrier gas and

carbon precursor, respectively. In this way, grapheme

powder is directly formed in a single step without

requiring any metal catalyst to induce the growing

process. In addition, the device and procedure can be

escalated at industrial level, adding a new technique for

graphene production to those already available.

Biography

María Dolores Calzada has completed her PhD degree in plasma physics from

the University of Seville in 1994. She carried out postdoctoral in Group of Plasma

Physics Department at University of Montreal, Canada. Since 1997, she joined the

department of physics at University of Córdoba, Spain and she is full professor from

2012. Currently, she is Head of the laboratory in innovation in plasmas (LIPs) with

research interests on the implementation of new spectroscopy methods for low-

temperature plasmas and the application of these ones into hydrogen production,

graphene synthesis, analytical chemistry, food conservation, and material

treatment.

md.calzada@uco.es

María Dolores Calzada

University of Cordoba - Rabanales Campus, Spain