Molybdenum Oxide Nanoparticles: Synthesis, Characterization and Application in Green-House Gas Sensing
An adduct behaviour of nano molybdenum oxide (MoO3) towards green house gas (CO2) sensing has been studied with the change in particle size and surface morphology of the hydrothermally synthesized MoO3 nanoparticles at various temperatures i.e., 80–200
°C at intervals of 20 °C designated as S1–S6 sequentially with time duration of 4 h for each batch. The synthesized samples were characterized by X-ray Diffraction (XRD), Scanning Electron Microscope (SEM), Particle Size Analyzer (PSA) and UV-Visible Spectroscopy (UV-Vis). The
XRD patterns revealed the orthorhombic structure of the synthesized samples with variation in particle size. The least particle size is observed for the MoO3 nanoparticles synthesized at 150 °C (sample S4) i.e., 22.8 nm from PSA. The gas sensing characteristics were performed
towards CO2 gas to examine the material's sensitivity over a temperature range of 50 °C to 400 °C towards 1000 ppm of CO2 gas. The sensor showed high sensitivity of S = 68.5% for the sample S4 at an optimum temperature of 200 °C. This proves that the
adsorption of the desired gas on the material increases with the decrease in the particle size. The response and recovery times were observed as 50 s and 40 s respectively.
Keywords: CO2 SENSOR; HYDROTHERMAL PROTOCOL; MOO3 NANOPARTICLES; PSA; SEM
Document Type: Research Article
Publication date: 01 March 2018
- Journal of Advanced Physics is an interdisciplinary peer-reviewed journal consolidating research activities in all experimental and theoretical aspects of advanced physics. The journal aims in publishing articles of novel and frontier physics that merit the attention and interest of the whole physics community. JAP publishes review articles, full research articles, short communications of important new scientific and technological findings in all latest research aspects of physics.
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