Enhancement of CO gas sensing performance by Mn-doped porous ZnSnO₃ microspheres

Abstract

Mn site in ZnSnO3 plays a critical role to adsorb CO molecules. This generates more number of oxygen vacancies in the lattice and hence more number of free electrons, improving the gas sensing.

Microwave-Assisted Hydrothermal Synthesis of {100} and {111} Faceted LiFeO2 Truncated Octahedra: Investigations on Volatile Organic Compound Sensing Performance

“…The {100} facets contain rows of alternative Li/Fe atoms and O atoms, whereas the {111} facets contain only Li/Fe atoms, which favors the adsorption of more oxygen or analyte molecules. When the LiFeO 2 truncated octahedron sensor is exposed to air, the atmospheric oxygen molecules interact with the surface of the material as per eqn and trap free electrons from the conduction band to form surface-adsorbed oxygen ions like O 2 – and O – as per eqs and , resulting in the formation of a depletion layer on the LiFeO 2 truncated octahedron surface as shown in Figure c, which leads to an increase in the base resistance. O 2 ( g a s ) → O 2 false( a d s false) O 2 ( a d s ) + e − → normalO 2 false( normala normald normals false) − normalO 2 false( normala normald normals false) − + e − → 2 O false( normala normald normals false) − …”

Facile synthesis of NiFe2O4-based nanoblocks for low-temperature detection of trace n-butanol

“…The reaction processes are apparent in eqn (2)–(5) . 24 O 2 (gas) → O 2 (ads) O 2 (gas) + e − → O 2 − , T < 100 °C O 2 − + e − → 2O − (ads), 100 °C < T < 300 °C O − (ads) + e − → O 2− (ads), T > 300 °C C 2 H 10 O + 12O − → 4CO 2 + 5H 2 O + 12e − e − + h + → null …”

Effect of Ti1−xFexO2 photoanodes on the performance of dye-sensitized solar cells utilizing natural betalain pigments extracted from Beta vulgaris (BV)

“…Previous studies suggested that transition metal doping alters the electronic dimensions, provides structural stability, and tunes the light absorption. [14][15][16][17] In most of the previously reported works on the BV dyebased DSSCs, generally photoanode structures were examined to investigate the device performance and stability. Although many nanostructured photoanodes were investigated it was impossible to significantly enhance the DSSC performance due to the insufficient charge collection efficiency, low photoscattering, and higher interfacial charge recombination.…”

“…Previous studies suggested that the transition metal doping alters the electronic dimensions, provide structural stability, and tuned the light absorption. [14][15][16][17]…”