Green synthesis of vanadium oxide nanoparticles for thin film based sensor application

Abstract

A high yield of single phase orthorhombic vanadium oxide (V2O5) nanoparticles with solution combustion method is obtained in a very quick succession at 500 °C, by the utilization of Butea monosperma seed extract, to study its suitability towards pressure sensors. The Structural, Transmission spectral, Morphological, Compositional and the Absorption spectral analysis of the deposited vanadium oxide nanoparticle samples are examined using X-Ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), Scanning electron microscope (SEM), High resolution transmission electron microscope (HRTEM), Energy dispersive X-Ray analysis (EDX) and Ultraviolet–visible spectroscopy (UV) respectively. The results from the structural analysis denote the nanoparticles with the crystallite size of 4.76 Å, dislocation density of 441.35*1016/m2 along with the micro strain of 76.0366*10-3. Infrared transmission spectral images clearly display three strong peaks at 1633.76 cm-1, 1070.80 cm-1 and 537.25 cm-1, stating the presence of a strong and stable vanadyl bonding structure. Images from its morphological analysis depict the nanoparticles are homogeneously porous without any cracks on its surface. The composition of the nanoparticles clearly displays the presence of vanadium and oxygen atoms in a strong bonding structure. Absorption spectral results showed that the obtained samples after synthesis are in nano size with narrow size distribution. The results obtained from the experimental analysis indicate a stable performance, good linearity and stability, indicating its suitability for pressure sensing application.

Comparative microstructural analysis of V2O5 nanoparticles via x-ray diffraction (XRD) technique

“…Y hkl (7) where, β hkl is full width at half maxima of a particular reflection, θ is angle of diffraction, k is shape factor, d is crystallite size, σ intrinsic stress and Y hkl Young's modulus in the direction perpendicular to crystal lattice (hkl) plane.…”

“…Solgel routes have been utilized for the synthesis of V 2 O 5 nanoparticles, offering a controlled and tunable approach [6]. Additionally, combustion methods have been employed due to their simplicity and high product yield [7].…”