One-pot synthesis of 3D hierarchical SnO2 nanostructures and their application for gas sensor

Bio-green synthesis of Ni-doped tin oxide nanoparticles and its influence on gas sensing properties

“…A gas sensor is generally characterized by its sensitivity, speed (response-recovery time), selectivity and sensitivity, 13 among which, the sensitivity weighs a lot, because higher sensitivity usually means potential sensing ability for gas detection at a low concentration level. 1D SnO 2 nanorod, 15 SnO 2 nanosheets, 16 SnO 2 nanoflowers, 17 Apart from this, one of the most important methods to modify the materials is the introduction of dopants into the host system. Thus, it is imperative to develop an applicable sensor for detecting NO 2 gas.…”

Hydrothermal Synthesis of TiO2@SnO2 Hybrid Nanoparticles in a Continuous‐Flow Dual‐Stage Reactor

“…It shouldb en oted that in other reports of SnO 2 synthesized at alkaline conditions ar ich variety of morphologies are observed, including nanoflowers, nanorods, and nanospheres. [44][45][46] The powder X-ray diffraction (PXRD) peak asymmetry towards lower angles indicates al arger unit cell size for parts of www.chemsuschem.org the diffractingv olume. This may be attributed to surface relaxation from hydroxylationo ri nclusion of OH defects.…”

Synthesis, characterization, and comparative gas sensing properties of tin dioxide nanoflowers and porous nanospheres

“…For n-type semiconductor metal oxides, the classical model of an electron depletion layer generated by surface oxygen species is considered be responsible for the sensing mechanism [29]. The studies have revealed that enhancement of the gas sensing performance of hierarchical SnO 2 nanostructures can be dramatically tuned by nanostructures of materials because of (i) the loose and porous 3D hierarchical nanostructures can facilitate molecular absorption, gas diffusion and mass transport; (ii) the special surface resulted from hierarchical nanostructure may provide suite active sites for target gas absorption, thus resulted in the selective performance; (iii) the more amounts of the adsorbed oxygen species are positive to the increase of the capability of the sensor [30][31][32]. Thus, we speculated the gas sensing properties of the fabricated sensors may be related to the effects of hierarchical structures.…”