Synthesis of SnO2 nano-dodecahedrons with high-energy facets and their sensing properties to SO2 at low temperature

Hollow Zinc Oxide Microsphere–Multiwalled Carbon Nanotube Composites for Selective Detection of Sulfur Dioxide

“…A comparison of the SO 2 sensing performance of the optimum ZnO−MWCNT (15:1) composite against previously reported metal oxide-based sensors is given in Table S1. From this table, it can be observed that the ZnO−MWCNT (15:1) composite displays a much higher sensing performance toward SO 2 gas than previous sensors based on CuO nanoplates, 87 ZnO nanoflowers, 88 SnO 2 nanododecahedrons, 89 BiFeO 3 and WO 3 nanoparticles, 90,91 and NiO−ZnO composites, 92,93 despite exhibiting slightly to moderately higher optimum operating temperature. For instance, CuO nanoplates displayed a response of 2.80 to 10 ppm of SO 2 gas at 200 °C.…”

Crystal facet effect of tin dioxide nanocrystals on photocatalytic degradation and photo-assisted gas sensing properties

“…36 In conclusion, it is urgent to study the crystal facet dependent effect and related mechanism of SnO 2 in the photocatalytic degradation of actual water pollutants. Different from the field of photocatalysis, the crystal facet dependent effect of SnO 2 has attracted much attention in the field of gas sensing towards the detection of various gases, including acetylene, 37 triethylamine, 38 SO 2 , 39 NO 2 , 40 and ethanol. 41 However, no research has been done on the ammonia gas sensing performance and mechanism of SnO 2 with specific crystal facets.…”

Phenylalanine Dipeptide-Regulated Ag/In2O3 Nanocomposites for Enhanced NO2 Gas Sensing at Room Temperature with UV Illumination

“…However, the oxygen molecules on In 2 O 3 surface grab electrons and become adsorbed oxygen (O 2 − , O − , O 2− ) for gas detection, which usually need to be at a temperature of 100−300 °C. 20 The high working temperature requires high power consumption that can lead to the combustion or explosion of the gas being detected. 21,22 To solve this problem, several techniques have been used, including incorporation of transition metals, application of a large electric field across the sensor terminals, and the illumination of sensors with UV radiation.…”

“…Among various efforts, semiconducting metal oxide has been popular due to the simplicity of its fabrication and low cost. , At the time of this study, a growing number of metal oxides have been used in the detection of various gases, such as tin oxide (SnO 2 ), − titanium dioxide (TiO 2 ), , tungsten oxide (WO 3 ), vanadium pentoxide (V 2 O 5 ), and zinc oxide (ZnO). ,− Furthermore, indium oxide (In 2 O 3 ) has the advantage of being able to detect both reducing and oxidizing gases, − with a high sensitivity and fast response due to its high surface-to-volume ratio for gas species absorption/desorption and low-resistance pathways for charge carrier transport. However, the oxygen molecules on In 2 O 3 surface grab electrons and become adsorbed oxygen (O 2 – , O – , O 2– ) for gas detection, which usually need to be at a temperature of 100–300 °C . The high working temperature requires high power consumption that can lead to the combustion or explosion of the gas being detected. , To solve this problem, several techniques have been used, including incorporation of transition metals, application of a large electric field across the sensor terminals, and the illumination of sensors with UV radiation.…”