Parts per Billion-Level H₂S Detection at Room Temperature Based on Self-Assembled In₂O₃ Nanoparticles

Room-Temperature High-Performance H2S Sensor Based on Porous CuO Nanosheets Prepared by Hydrothermal Method

“…There are lots of reports recently on the synthesis of various types of the CuO nanostructures, which include nanoparticles, 15 nanoneedle, 16 nanowires, 17 nanoflowers, 18,19 nanotube, 20 nanorods, 21 nanoleaves and nanosheets. 22−29 Among these, the 2D sheet-like CuO nanostructures have received considerable attention because of their high anisotropy and nano-scale 4 thickness. The nano-porous structures of CuO sheets could allow a fast and efficient gas adsorption on their surfaces, thus the response times of gas sensor will be significantly decreased.…”

Room-temperature H2S Gas Sensor Based on Au-doped ZnFe2O4 Yolk-shell Microspheres

“…44 While it exposed to H2S gas, the H2S molecules react with the previously absorbed oxygen species. The reaction between the H2S gas and the absorbed oxygen species can be expressed using the following equation: 44,45 2H2S + 3O2 -(ad) → 2H2O(g) + 2SO2(g) + 3e -During this process, as a result of the release of electrons into the conduction band of ZnFe2O4, the electron-depletion layer becomes thinner, and ZnFe2O4becomes less resistive.…”

Hydrothermally synthesized CeO2 nanowires for H2S sensing at room temperature

“…They will react with the previously absorbed oxygen species (O2 -) and generate sulfur oxides and H2O vapor. The reaction between the H2S gas and absorbed oxygen species could be expressed using the following equation [38,39]:…”

“…According to the sensing mechanisms of the semiconductors [36][37][38][39], the good H2S sensing performance of the CeO2 nanowires is related to the following factors.…”