Room-temperature, high selectivity and low-ppm-level triethylamine sensor assembled with Au decahedrons-decorated porous α-Fe2O3 nanorods directly grown on flat substrate

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

“…2. Room temperature gas sensors based on single phase semiconducting metal oxide nanostructures 2.1 N-type semiconducting metal oxide nanostructures and gas sensors N-type SMONs are the most reported sensing materials for RT resistive gas sensors, and they include ZnO, [152][153][154][155][156] SnO 2 , [157][158][159][160] In 2 O 3 , 161 WO 3 , 162 TiO 2 , [163][164][165][166] Fe 2 O 3 , [167][168][169] MoO 3 , 170 174 acetone, 175 alcohol, 106 HCHO, 176 liquefied petroleum gas (LPG), etc. Table 1 summarizes some of the reported RT sensors using the n-type SMONs.…”

Mulberry-like heterostructure (Fe–O–Ti): a novel sensing material for ethanol gas sensors

“…6a suggests that the elements O, Fe and Ti were existed in Fe-O-Ti heterostructure nanoparticles. 26,27 The binding energies at 710.45 and 724.10 eV respectively correspond to Fe 2p 3/2 and Fe 2p 1/2 (Fig. 5b).…”

“…The nanoscale porous structure of the Fe-O-Ti heterostructures can accelerate the reaction rate of gas sensing reaction, which lead to faster response and recovery time of the gas sensor. 26,41 Gas sensing performance of Fe 2 O 3 -or TiO 2 -based nanomaterials to ethanol were listed in Table 1. It suggested that mulberry-like heterostructure Fe-O-Ti has a good sensing performance.…”

Nano metal oxides for sensing the VOC based gaseous pollutants

“…High extent of chemisorbed oxygen adsorption capacity on the surface of Au/α-Fe 2 O 3 results in the high response by accelerating the reaction between the oxygen species and the reducing gas. This leads to decrease in recovery time of Au/ α-Fe 2 O 3 sensors [29]. In addition, few other nano materials used in the sensing of various types ofVOCs at different concentratin and operating temperature are summerised in the Table 1.…”