TITLE:
Synthesis and Structural Characterization of Monocrystalline α-V2O5 Nanowires
AUTHORS:
María Luisa Tafoya Ronquillo, Patricia Santiago Jacinto, Pilar Ovalle, Luis Rendón Vázquez, Elizabeth Chavira Martínez, Ernesto Marinero, Vicente Garibay
KEYWORDS:
Nanostructures, Oxides, Crystal Growth, X-Ray Diffraction, Crystal Structure
JOURNAL NAME:
Materials Sciences and Applications,
Vol.7 No.9,
September
1,
2016
ABSTRACT: A stable one-dimensional system in an
orthorhombic α-V2O5 nanowires monocrystalline structure was obtained by a solvothermal method from
a polymorphic V2O5 structure. The starting material was
firstly submitted to acid hydrolysis in H2O2 followed by
a solvothermal treatment. The outcome of this procedure, a metastable phase of
the one-dimensional system V10O24·12H2O/V3O7·H2O,
was subsequently reoxidized by controlled heating in an open air system. The
final product was an orange crystalline solid mainly formed by monocrystalline
nanowires of α-V2O5 having lengths of tens of micrometers and widths of about 75 nm with a
preferential [200] growth direction. It was found that the pH value of the
initial solution plays an important role in the formation of the crystalline
phase in the final products. Characterization was performed by X-ray
diffraction (XRD), scanning electron microscopy (SEM) and high-resolution
transmission electron microscopy (HRTEM). This study offers an alternate route
for the synthesis of vanadium oxides and related compounds.