Gas-sensing studies on SnO2 or NASICON-type composite materials

Abstract

NASICON Na 1þx Zr 2 Si x P xÀ3 O 12 ; 0 x 3 ð Þ powders were prepared by solid-state synthesis, a fraction was ion exchanged by Li or K, verified by X-ray diffraction and energy dispersive X-ray analysis, blended with tin oxide powder, transferred to thick film pastes, and dispensed on a commercial sensor substrate (Heraeus, Germany). Simultaneous gas sensitivity measurements on nine SnO 2 /NASICON-type (M 1þx Zr 2 Si x P xÀ3 O 12 , x=0, 2.2, 3, M = Li, Na, K) composites in thermocyclic sensor operation mode by exposure to different concentrations of Ethanol, Toluene, Propylene, CO, and H 2 in humidified synthetic air show a strong correlation of the gas-sensing properties with the mobile ion concentration and type of the solid electrolyte additive.

Optimization of High Conducting Na3Zr2Si2PO12 Phase by new Phosphate Salt for Solid Electrolyte

“…01-084-1200) phases. It is well reported in the literature that initially SiO 2 segregates in the glassy matrix which leads to formation of Na 2 ZrSi 2 O 7 phase along with m-ZrO 2 phase [16]. On the other hand, the samples sintered at 1150 • C, 1200 • C and 1250 • C exhibit m-Na 3 Zr 2 Si 2 PO 12 with minor m-ZrO 2 as given in Table 1.…”

The enhanced alcohol-sensing response of ultrathin WO3nanoplates

“…Alcohol sensors with unique performance have numerous practical applications in the areas of wine quality monitoring, breath analysis, and the food and biomedical industries [13,14]. Semiconducting metal oxides, including SnO 2 nanofibers [15], branched SnO 2 nanowires [16], indium-doped SnO 2 nanowires [17], ZnO nanorods [18], porous ZnO nanoplates [19], ZnO nanotubes [20], TiO 2 nanoparticles [21], porous α-Fe 2 O 3 nanorods [22], α-Cr 2 O 3 nanotubes [23], porous ZnFe 2 O 4 nanorods [24], CdIn 2 O 4 nanocrystals [25], V 2 O 5 nanobelts [14], V 2 O 5 macroscopic fibers [26], SnO 2 /NASICON-type composites [27] and α-Fe 2 O 3 /SnO 2 core-shell nanorods [28], have been reported as efficient active elements for alcohol-detection applications. However, there are also some problems needing to be solved.…”