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

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 (NaCO), hexamethylenetetramine (HMTA), ammonia solution (NH·HO), and sodium hydroxide (NaOH) were observed. ZnO were confirmed to be impurity-free through XRD analysis, and their morphological features were characterized by SEM.