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Journal of Materials Science and Nanotechnology | Volume 3
February 25-26, 2019 | Paris, France
Materials Science and Engineering
2
nd
International Conference on
One simple and facile synthesis of different phase of vanadium di-oxide (VO
2
) via hydrothermal route
Meenu Saini
and
Brijnandan S Dehiya
Deenbandhu Chhotu Ram University of Science & Technology, India
Among all these vanadium dioxide phases, VO
2
(B) and VO
2
(M)
are especially interesting due to their layered structure, good
energy capacity with high potential and promising applications
in the field of energy conversion. VO
2
(B) is used as cathode
material for Li-ion batteries, it is also used as precursor for the
synthesis of VO
2
(M/R). VO
2
(M) is useful as a coating on smart
windows, electrical and optical switching devices etc. In the
past few decades, a lot of research work has been done in the
area of synthesis of VO
2
(B) and VO
2
(M). But the synthesis of
VO
2
(M) in a single step without doping is still rare. Here, we
have reported the successful facile synthesis of VO
2
(B) and VO
2
(M) in one step by hydrothermal method.
Methods:
The different phase of VO
2
has been synthesized by
varying molar ratio of reducing agent (citric acid monohydrate,
C
6
H
8
O
7
.H
2
O) to vanadium source (vanadium (V) oxide, V
2
O
5
) at
an autoclave temperature of 230
o
C for 24hr by hydrothermal
method. Six samples were synthesized with corresponding
variation in molar ratio of vanadium (V) oxide to citric acid
monohydrate as 1:1, 1:1.5, 1:2, 1:3, 1:4, 1:5 respectively.
Results:
The synthesized nanoparticles were characterized
by XRD for phase identification and comparison done with
simulation also. SEM and TEMwere performed for morphology
and, UV-Vis and FTIR for other physico-chemical information.
Electrical conductivity studies were carried out against
temperature, and thermal properties were measured using a
STA. Single phase VO
2
(B), VO
2
(M) and amorphous VO
2
can be
synthesized by the mere variation of reducing agent relative
concentrations.
Conclusion:
A simple, one-step procedure is sufficient to
produce pure phases without the use of inert environment
or post-synthesis heat treatments. In addition, the crystal size
mode is found to be sub-10 nm
e:
meenu.rschmsn@dcrustm.org