Effect of Alkali Source on Crystal Regulation and Ethanol Gas Sensing Properties of Nano-ZnO.

ABSTRACT: This study investigates the ethanol gas-sensing mechanisms of ZnO nanocrystals with distinct morphologies, synthesized via a hydrothermal method using various alkali sources. Significant differences in the gas-sensing performance and morphology of ZnO samples synthesized with ammonium carbonate (Na₂CO₃), hexamethylenetetramine (HMTA), ammonia solution (NH₃·H₂O), and sodium hydroxide (NaOH) were observed. ZnO were confirmed to be impurity-free through XRD analysis, and their morphological features were characterized by SEM. TEM, XPS, and FTIR were employed to further analyze the crystal structure and binding energy of ZnO. To elucidate the underlying mechanisms, density functional theory (DFT) calculations combined with electron depletion layer th

SUBMITTER: Liao Y 

PROVIDER: S-EPMC11644861 | biostudies-literature | 2024 Nov

REPOSITORIES: biostudies-literature