+44-1518-081136One simple and facile synthesis of different phase of vanadium di-oxide (VO2) via hydrothermal route
2nd International Conference on Materials Science and Engineering
February 25-26, 2019 | Paris, France
Meenu Saini and Brijnandan S Dehiya
Deenbandhu Chhotu Ram University of Science & Technology, India
Posters & Accepted Abstracts : Mater Sci Nanotechnol
Abstract:
Among all these vanadium dioxide phases, VO2 (B) and VO2 (M)
are especially interesting due to their layered structure, good
energy capacity with high potential and promising applications
in the field of energy conversion. VO2 (B) is used as cathode
material for Li-ion batteries, it is also used as precursor for the
synthesis of VO2 (M/R). VO2 (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 VO2 (B) and VO2 (M). But the synthesis of
VO2 (M) in a single step without doping is still rare. Here, we
have reported the successful facile synthesis of VO2 (B) and VO2
(M) in one step by hydrothermal method.
Methods: The different phase of VO2 has been synthesized by
varying molar ratio of reducing agent (citric acid monohydrate,
C6H8O7.H2O) to vanadium source (vanadium (V) oxide, V2O5) at
an autoclave temperature of 230oC 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 TEM were 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 VO2 (B), VO2 (M) and amorphous VO2 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
Biography:
E-mail:
meenu.rschmsn@dcrustm.orgPDF HTML