Au-loaded Zn2SnO4/SnO2/ZnO nanosheets for fast response and highly sensitive TEA gas sensors

In-MIL-68 derived In2O3/Fe2O3 shuttle-like structures with n–n heterojunctions to improve ethanol sensing performance

“…When the temperature is too high, it will drive gas molecules with high energy of activation to escape rapidly at the surface of the material, leading to low response. 28 From Fig. 6a, it can be noted that the response of In0Fe and In0.1Fe to 100 ppm ethanol reaches its maximum value at 250 °C and 200 °C, respectively, and the optimum working temperature of the material after composite is 50 °C lower than that of the pure phase material.…”

Novel Metal–Organic Framework-Assisted Synthesis of ZnO Nanoparticle-Decorated {221} SnO2 Octahedrons for Improved Triethylamine Gas Sensing

“…As a result, the carrier concentration increases, while the resistance decreases at the same time. The surface gas-sensing reactions are expressed as follows: − …”

“…As a result, the carrier concentration increases, while the resistance decreases at the same time. The surface gas-sensing reactions are expressed as follows: − O 2 ( g ) ↔ O 2 ( ads ) O 2 ( ads ) ↔ O 2 − ( ads ) + h · O 2 − ( ads ) ↔ 2 O − ( ads ) + h · 2 normalN false( C 2 H 5 false) 3 ( gas ) + 39 O − ( ads ) → N 2 + 15 H 2 O 2 + 12 CO 2 + 39 e − …”

Nanostructured metal oxide heterojunctions for chemiresistive gas sensors

“…For example, Sun et al proposed noble metal-doped multiple heterostructured metal oxide (Au-doped Zn 2 SnO 4 /SnO 2 /ZnO) nanosheets for trimethylamine monitoring by means of a low-cost hydrothermal approach. 174 As shown in Fig. 8d, the existence of other interfering gases, including ethanol, methanol, acetone, toluene and ammonia, insignificantly affects its sensitivity, indicating excellent selectivity in the analysis of the target gas.…”