V₂O₅ has attracted much attention because of its multivalent layered structure, high catalytic and electrical properties. It is also potential candidate for chemiresistive gas sensor application. V₂O₅ films are deposited using chemical spray pyrolysis technique at a substrate temperature of 300°C by varying volume of the precursor. X-ray diffraction studies confirm that deposited thin films are polycrystalline nature with orthorhombic phase. The predominant peak, which has the maximum intensity, has appeared along (001) direction and it is considered as preferred orientation. The crystallite size is determined using Scherrer’s formula and it is found to increase from 19.2 to 26.4 nm with the increase of precursor volume. The surface morphology of the films is explained using SEM and it has appeared as fibre-like morphology at the volume of 30mL precursor. Chemical stoichiometry of the V₂O₅ films is analyzed using EDX and the spectra consist of vanadium and oxygen atoms only. Layered structured and polycrystalline behaviour of the deposited thin films is studied using micro-Raman spectroscopy. Optical properties are investigated using UV–Visible spectroscopy and the optical band gap is measured using Tauc plot and it is found increase from 2.28 to 3.33eV as the volume of the precursor is enhanced from 20mL to 40mL. The mobility, concentration of charge carriers and resistivity of vanadium pentoxide thin films prepared at various precursor volumes determined using Van der Pauw Hall system. Gas sensing investigations have been carried out using the static liquid distribution method. The selectivity of the film towards various volatile organic vapours is determined.

V ₂ O ₅由于具有多价层状结构，高催化性能和电性能而备受关注。它也是化学气体传感器应用的潜在候选者。V ₂ O ₅通过改变前驱物的体积，使用化学喷雾热解技术在300°C的基板温度下沉积薄膜。X射线衍射研究证实，沉积的薄膜具有正交晶相，具有多晶性质。具有最大强度的主要峰沿（001）方向出现，被认为是首选方向。使用Scherrer公式确定微晶尺寸，并且发现其随着前体体积的增加从19.2nm增加至26.4nm。使用SEM解释了薄膜的表面形态，并在30mL前体的体积下表现为纤维状形态。V ₂ O _5的化学计量使用EDX分析薄膜，其光谱仅由钒和氧原子组成。使用显微拉曼光谱研究了沉积薄膜的分层结构和多晶行为。使用紫外可见光谱法研究了光学性质，并使用Tauc图测量了光学带隙，发现随着前体体积从20mL增加到40mL，光学带隙从2.28eV增加到3.33eV。使用Van der Pauw Hall系统测定的各种前驱体体积制备的五氧化二钒薄膜的迁移率，电荷载流子浓度和电阻率。使用静态液体分配方法进行了气敏研究。确定了膜对各种挥发性有机蒸气的选择性。