Porous SnO2 hierarchical nanosheets: hydrothermal preparation, growth mechanism, and gas sensing properties

Microwave assisted synthesis of hierarchical Pd/SnO2 nanostructures for CO gas sensor

“…The improvement of the sensing performance of 3D structure is mainly ascribed to their unique configuration that the flake-like architecture composed of nanoflakes possesses more exposed surface, which could facilitate the diffusion and adsorption of the gas molecules and provide plenty of active sites and space for redox reaction between carbon monoxide gases and adsorbed oxygen [31,32]. When the sensors are exposed to air, oxygen molecules can be easily adsorbed to the exposed surfaces of these structures and be captured [33]. Electrons are transferred from SnO 2 nanoclusters to PdO nanoclusters because of the larger work function of PdO than SnO 2 .…”

A new way for synthesizing SnO2 nanosheets

“…Tin dioxide (SnO 2 ) is an important non-layered semiconductor oxide with a wide bandgap (Eg¼ 3.6 eV) and has been widely studied for many applications such as gas sensors, supercapacitors, solar cells and lithium-ion batteries [7][8][9][10]. Enormous efforts have been devoted to synthesizing two dimensional (2D) SnO 2 nanosheets for their high performance applications [11][12][13].…”

Tuning SnO 2 architectures with unitary or composite microstructure for the application of gas sensors

“…These excellent works inspire us to use PVP directly as structure directing agent which can be assisted in generating the specific microstructure. In addition, the high temperature and high pressure of solvothermal condition influence the ostwald ripening process and the driving force for nucleation, crystal growth, coagulation, and flocculation [19,20]. So the PVP assisted synthesis of SnO 2 with or without solvothermal process were studied in a comparative view.…”