Structural analysis of nanostructured iron antimonate by experimental and quantum chemical simulation and its LPG sensing

A stable and highly sensitive room-temperature liquefied petroleum gas sensor based on nano-cubes/cuboids of zinc antimonate

“…We have removed the above drawback of the sensor and fabricated nano-cube/cuboid-based LPG sensors with a short response time as compared to previous sensors reported in literature. [1][2][3][4][5][6][7][8][9][10][11][12][13]40,59,61,64 As discussed in introduction section, the maximum sensitivity of room-temperature LPG sensors reported in literature is 0.77 for 600 ppm of LPG, as investigated by Goutham et al 53 However, the sensor we developed has a sensitivity of 1.36 for 1000 ppm of LPG, which is quite high in comparison to previous sensors reported below the lower explosive limit (LEL) of LPG. Moreover, the response and recovery times of our sensor are $41 and 95 s, respectively, which are less than those observed by Saxena et al 58 Therefore, in fact, our study is an advanced step towards the development of an efficient sensor for LPG detection.…”

“…LPG sensors based on nanospheres, nanorods, nano-owers, nanoellipses, nanonails, and vertical and horizontal rods have already been investigated, [1][2][3][4][5][6][7][8][9][10][11][12][13]40,59,61,64 but their sensing behaviours were found cumbersome to use due to their large response time. We have removed the above drawback of the sensor and fabricated nano-cube/cuboid-based LPG sensors with a short response time as compared to previous sensors reported in literature.…”

“…[43][44][45][46][47] Noble metal catalysts such as antimony, when coated on the oxide surface, result in improvement of the sensing capabilities, as antimony tends to promote chemical reactions by reducing the activation energy between the oxide and the gas to be detected. 59 Therefore, antimonybased trirutile nanostructured oxide materials (antimonates) are promising, as they increase the rate of reaction (adsorption/ desorption) between the incoming target gas molecules and the sensing layers. 40 This is quite signicant to improve the sensitivity, selectivity, repeatability, stability, and response and recovery times of the sensor.…”

“…Antimony acts as a catalyst for the dissociation of oxygen over the lm surface and, thus, enhances the spillover of oxygen species over the lm surface, which may enhance the sensitivity of the sensor. 59 The increased reactivity of nanostructured antimonates at room temperature may result in an increase in the sensitivity, which diminishes the required power consumption and, thus, has a valuable effect on the stability and lifetime of the sensor. Therefore, the primary objective of our research is to synthesize nanostructured antimonate material suitable for the development of a gas sensor.…”

Fast-LPG Sensors at Room Temperature by α-Fe2O3/CNT Nanocomposite Thin Films

“…Many reports are available on the development of the LPG sensors that operate at room temperature, the reduction of the MOS size [6,7], and the mixing of MOS with metal nanoparticles [8] including the fabrication of heterojunctions [4,[9][10][11], which is one of the most strategies used. Due to the mixing of MOS and other materials, it formed a variety of the unique properties for sensing material, such as a change in conductance, improved surface catalytic property, increasing surface reaction sites, and producing a high porosity [12].…”