Self-templated flower-like WO3-In2O3 hollow microspheres for conductometric acetone sensors

Metal oxide semiconductor gas sensing materials for early lung cancer diagnosis

“…The metal oxide gas sensor's sensitivity could be boosted by the addition of a noble metal according to Refs. [23,24,[37][38][39]. Doping strengthens the gas sensor sensing performance by modifying the bandgap structure and decreasing charge carriers' activation energy.…”

Hierarchical In2O3/rGO nanostructures with uniformly distributed In2O3 nanoparticles: microwave-assisted synthesis and improved NO-sensing performance

“…It has been used for detecting various gases, including NO x , 17,18 H 2 S, 19 CO, 20 H 2 , 21 ozone 22 and some volatile organic gases. [23][24][25][26] In 2 O 3 -based sensors for the detection of pure NO have rarely been reported and present poor performance. Chinh et al 27 fabricated In 2 O 3 sensors by an arc-discharge method, and the sensor showed a maximum response of 10.3 at 200 1C towards 20 ppm NO gas.…”

Hollow Mesoporous SnO2/Zn2SnO4 Heterojunction and RGO Decoration for High-Performance Detection of Acetone

“…In recent years, gas sensors based on metal oxide semiconductors are considered a convenient and simple analysis technique for conventional VOCs. Metal oxide semiconductors, such as WO 3 , , ZnO, α-Fe 2 O 3 , NiO, CO 3 O 4 , In 2 O 3 , and SnO 2 , have been extensively explored as gas-sensing materials because of their excellent sensitivity, rapid response–recovery time, and concise preparation process. Recently, some researchers confirm that the sensing properties of metal oxides are decided by the morphology, nanostructure, and composition of sensing materials. − Thus, many investigations on surface structure and dimension are conducted to increase gas-sensing performance as much as possible by regulating the surface active site and adsorption process.…”

“…In various ternary Sn-based metal oxides, Zn 2 SnO 4 is a typical n-type semiconductor oxide. Benefiting from its excellent gas sensitivity and good electronic characteristics, Zn 2 SnO 4 -based sensors are widely applied in the gas-sensing field. − However, scholars found that the improvement of optimizing the morphology and adjusting structure is limited in gas-sensing performance. , To the best of our knowledge, fabricating heterojunctions (combining individual metal oxides) is the most effective method to boost gas-sensing properties by optimizing electron transfer. At present, different kinds of n–n/p–n heterojunction architectures are reported in detail, including SnO 2 /ZnSnO 3 , NiO/Zn 2 SnO 4 , ZnO/ZnFe 2 O 4 , Co 3 O 4 /CoFe 2 O 4 and SnO 2 /Zn 2 SnO 4 .…”

“…33−36 However, scholars found that the improvement of optimizing the morphology and adjusting structure is limited in gas-sensing performance. 20,37 To the best of our knowledge, fabricating heterojunctions (combining individual metal oxides) is the most effective method to boost gas-sensing properties by optimizing electron transfer. At present, different kinds of n−n/p−n heterojunction architectures are reported in detail, including SnO 2 /ZnSnO 3 , 38 41 and SnO 2 /Zn 2 SnO 4 .…”