A DFT study on the Ag-decorated ZnO graphene-like nanosheet as a chemical sensor for ethanol: Explaining the experimental observations

Oxygen vacancy‐rich ZnO nanorods‐based MEMS sensors for swift trace ethanol recognition

“…Furthermore, in contrast to the large size (1583 nm) of ZnO NPs, the ZnO NRs possessed a smaller crystallite size (average diameter: 8.5 nm, less than twice Debye length), which indicated that the gas‐induced variation in the surface‐trapped charge density was greatly amplified in this case, equivalent to a high sensitivity 58–60 . As for the excellent selectivity, previous reports verified that ZnO exhibited stronger interaction toward ethanol than other gases molecules by DFT simulations 61,62 . Besides, each ethanol molecule would release more electrons back to ZnO than other interfering gases during the reaction with O − on the surface of ZnO NRs (Equations S1–S8), thus leading to a preferable response toward ethanol 51 …”

“…[58][59][60] As for the excellent selectivity, previous reports verified that ZnO exhibited stronger interaction toward ethanol than other gases molecules by DFT simulations. 61,62 Besides, each ethanol molecule would release more electrons back to ZnO than other interfering gases during the reaction with O − on the surface of ZnO NRs (Equations S1-S8), thus leading to a preferable response toward ethanol. 51…”

Highly dispersed Pd nanoparticles on NiO–CuO nanocomposite for efficient ethanol sensing

“…1,2 Hence, it is essential to develop a rapid, sensitive, and reliable approach for the determination of ethanol to monitor accidental cases and quality control process of various food products as well as alcoholic beverages. [3][4][5][6] Several methods, including gas chromatography (GC), high performance liquid chromatography (HPLC), fluorescence, spectrophotometry, mass spectrometry, refractometry, specific gravity, and electrochemical (electroanalytical), have been used for ethanol detection. However, most of the methods retain severe limitations, such as high cost, operation and maintenance processes, and composite and laborious procedures.…”

“…31 Among all these catalysts, the metal oxides and their nanocomposites came into spotlight owing to their low band gap, non-toxicity, cost-effectiveness, high chemical stability, easy availability, and good electrical conductivity. 32,33 Currently, the mono metal oxides have been explored often for the sensing application, including, W 18 O 49 , 27 CuO, 34,35 SnO 2 , [36][37][38] ZnO, [39][40][41] In 2 O 3 42 a-NiMoO 4 , 43,44 ZrO, 45 NiO, 46,47 50,51 and CdO. 52 Amongst these transition metal oxides, NiO is a good electro-catalytic material for sensing applications of alcohol since it is p-type semiconducting material having good chemical/thermal stability and catalytic activity.…”

“…31 Among all these catalysts, the metal oxides and their nanocomposites came into spotlight owing to their low band gap, non-toxicity, cost-effectiveness, high chemical stability, easy availability, and good electrical conductivity. 32,33 Currently, the mono metal oxides have been explored often for the sensing application, including, W 18 O 49 , 27 CuO, 34,35 SnO 2 , 36–38 ZnO, 39–41 In 2 O 3 42 α-NiMoO 4 , 43,44 ZrO, 45 NiO, 46,47 Fe 2 O 3 , 48 Co 2 O 4 , 49 MnO 2 , 50,51 and CdO. 52…”