Hydrothermal synthesis and their ethanol gas sensing performance of 3-dimensional hierarchical nano Pt/SnO2

Enhanced toluene gas-sensing properties of MEMS sensor based on Pt-loaded SnO2 nanoparticles

“…). The reaction process can be described as equations (2)-( 5) [90]. Once a dynamic equilibrium is attained, with continuous chemisorption of oxygen molecules, the corresponding free electrons are released and accumulate on the surface of SnO 2 .…”

Review on Porosity Control in Nanostructured Semiconducting Metal Oxides and Its Influence on Chemiresistive Gas Sensing

“…25−30 In particular, nanostructured materials have been actively investigated in the gas sensor. 31 Thus far, different synthetic methods for porous nanostructured SMOs have been reported including electrospinning, 3,32−34 spray pyrolysis, 35 hydrothermal, 36 solvothermal, 37,38 and direct precipitation. 39,40 On the other hand, various techniques to overcome their poor intrinsic gas selectivity have been suggested including functionalization with catalysts, 41−43 defect creation, 44 phase control, 45 and coating with selectivity overlayer.…”

“…Among them, SMOs have been widely used as gas-sensing layers due to their superior gas sensitivity at elevated temperatures. − In particular, nanostructured materials have been actively investigated in the gas sensor . Thus far, different synthetic methods for porous nanostructured SMOs have been reported including electrospinning, ,− spray pyrolysis, hydrothermal, solvothermal, , and direct precipitation. , On the other hand, various techniques to overcome their poor intrinsic gas selectivity have been suggested including functionalization with catalysts, − defect creation, phase control, and coating with selectivity overlayer. ,, Many publications ,− summarizing the performance of state-of-the-art SMOs concerning sensitivity, selectivity, sensing mechanisms, and morphology engineering have been widely reported.…”

Photochemical synthesis of bimetallic CuNiSxquantum dots onto g-C3N4as a cocatalyst for high hydrogen evolution

“…Recently, transition-metal sulfides as cocatalysts have attracted extensive attention due to their facile preparation, low cost, chemical stability, and high electron mobility. 27–33…”

“…utilized noble metal cocatalysts, such as Pt, Pd, and Ru, have good performance, but their disadvantages of high cost, rarity, and environmental pollution have restricted their application.Recently, transition-metal sulfides as cocatalysts have attracted extensive attention due to their facile preparation, low cost, chemical stability, and high electron mobility. [27][28][29][30][31][32][33] At present, nickel sulfide (NiS) possesses great potential as an ideal cocatalyst because of its earth-abundant elements and features exceptional chemical properties. 34 According to the reported articles, the key point of the photocatalytic mechanism of NiS is the active S site on the edge forming sulfurhydrogen (S-H ads ) bonds, which can effectively enrich H + to construct reaction centers.…”