Mesoporous In₂O₃ nanocrystals: synthesis, characterization and NO_x gas sensor at room temperature

Abstract

Highly mesoporous In2O3 nanocrystals exhibit excellent sensing performance toward NOx, with a low detection limit of 970 ppb at room temperature.

Advances in designs and mechanisms of semiconducting metal oxide nanostructures for high-precision gas sensors operated at room temperature

“…Various SMONs have been designed and synthesized, such as nanorods, [71][72][73][74][75] nanoparticles, [76][77][78][79][80][81] nanowires, [82][83][84][85][86][87][88][89] nanospheres, 90 nanosheets, [91][92][93][94] nanotubes, [95][96][97][98] and mesoporous nanostructures. [99][100][101][102][103] The literature on SMON-based RT gas sensing is rich and the application area is very critical. New devices have been regularly introduced.…”

Hydrogen gas sensor based on mesoporous In2O3 with fast response/recovery and ppb level detection limit

“…The measured lattice fringe spacings of 0.293 nm and 0.253 nm (in Fig. 2d) are corresponding to the crystal planes of (222) and (400) of cubic In2O3 [47], respectively. N2 adsorption/desorption isotherm of mesoporous In2O3 (the inset is pore size distributions).…”

Metal oxide nanomaterial-based sensors for monitoring environmental NO2and its impact on the plant ecosystem: a review

“…The sensing action was due to the nanocrystalline SnO 2 grains and the high density of defects (twin boundaries & dislocations) [97]. The sensor using In 2 O 3 mesoporous was reported with its high response value of 158.7 towards 97 ppm NO 2 , with a fast response time of 96 s and a low LOD of 970 ppb at RT [19]. The sensor made of TiO 2 nanoparticles (6.…”

“…A different process for the manufacture of MOS-nanostructured NO 2 gas sensors is pre-synthesis followed by deposition (using spin coating, paste printing, and PLD methods, etc.) of the as-prepared MOS-based nanomaterials synthesized by hydrothermal [19,102,103,125,126], solvothermal [135], and solgel [106,136], and others [175,176].…”