Mesostructured SnO2 as sensing material for gas sensors

Electrospun fibrous polyacrylic acid membrane-based gas sensors

“…It can be seen that the frequency shifts have an opposite trend with the average fiber diameter. In general, the sensitivity of sensors increases with increasing the surface area [18]. And the surface area increases with decreasing the average fiber diameter [19].…”

Efficient synthesis of biodiesel over well-dispersed sulfated mesoporous SiO 2 colloidal spheres

“…The sharp bands in the region of 1400-1500 cm −1 are attributed to the deformation of \CH 2 \ and \CH 3 of the incorporated surfactants [28]. The band in the region of 3018 cm −1 is clearly observed, which is assigned to C\CH 3 asymmetric stretching and N\CH 3 symmetric stretching vibrations of solid surfactant [29]. When the HPMo interacted with CTAB, strong peaks at 2925, 2853, 1474, 1384 cm −1 are observed from M-6, which are assigned to C\H stretching vibrations, revealing the formation of molybdophosphoric acid quaternary ammonium.…”

Preparation of Macroporous Semiconductive Materials for the Sensing of Sulfur Compounds

“…In particular, the generation of highly specific surface areas and uniform systems of large pores increases the probability of a gas interacting with a semiconductor, which is likely to increase the sensitivity of the material. The concept of utilizing self-assembled arrays of amphiphiles to synthesize well-ordered mesoporous materials (3) has recently been applied to tin oxide (SnO 2 ). SnO 2 is the most widely used n-type semiconductor in gas-sensing devices because of its ability to detect combustible gases, such as CH 4 , C 2 H 5 OH, CO, and H 2 .…”