Preparation of cross-linked porous SnO2 nanosheets using three-dimensional reduced graphene oxide as a template and their gas sensing property

Sodium citrate-induced generation of multi-interfacial embroidered spherical SnO2for augmented electromagnetic wave absorption

“…The void structure can be used effectively to reduce the density of the material and adjust the electromagnetic parameters to be more adequate for practical production applications. 44…”

Current Trends in Nanomaterials for Metal Oxide-Based Conductometric Gas Sensors: Advantages and Limitations—Part 2: Porous 2D Nanomaterials

“…However, this method is laboratory in nature and is unacceptable for large-scale application. Huang et al [ 97 ] have taken a different approach to preparing porous 2D nanostructures. Cross-linked porous tin dioxide nanosheets were obtained using three-dimensional reduced-graphene oxide as a hard template followed by an annealing process at 550 °C in the air for 4 h ( Figure 11 ).…”

“…The operation temperature depends on the semiconductor used and its structural condition. However, as a rule for most sensors, the maximum sensory response to reducing gases is observed at temperatures of 200–340 °C [ 88 , 97 , 110 ], and to oxidizing gases, at a temperature of 100–200 °C [ 62 , 90 ]. This difference is associated with a different mechanism of sensory response to these gases and is typical of all metal oxide sensors [ 15 , 111 , 112 ].…”

“… ( a ) Schematic diagram of the synthesis procedure and (b ) SEM image of porous SnO 2 nanosheets. Reprinted with permission from Huang et al [ 97 ]. Copyright 2022: Elsevier.…”

Nanosensor Based on Thermal Gradient and Machine Learning for the Detection of Methanol Adulteration in Alcoholic Beverages and Methanol Poisoning

“…Due to this poor selectivity, it is difficult to distinguish two similar molecules such as ethanol and methanol. Although SnO 2 is one of the metal oxides with the best properties and therefore most used for gas sensors, even the finest nanostructures such as cross-linked porous nanosheets [ 20 ] and hollow nanoparticles [ 21 ] exhibit very similar responses to these two gases, making them difficult to distinguish. Therefore, chemoresistors are usually joined in arrays called electronic noses, which exploit different materials to obtain good selectivity [ 22 , 23 ].…”