1988 年 9 巻 6 号 p. 452-458
In order to clarify adsorption and reaction on the fine ZnO particle surfaces in the atmosphere, the heating desorption analysis of the particles, which had previously adsorbed CO2 gas or CO2 gas containing water, was carried out using FID and TCD gas chromatography. The prism-like and the needle-like ZnO fine particles were synthesized by gas phase oxidation of zinc vapor. The effects of water vapor and of the surface crystal structure of these particles were examined, and the reaction of CO2 gas with H2O adsorbed on the crystal surface was studied. The results revealed that adsorption of H2O on the ZnO surface gave great influence upon the reaction with CO2 in the atmosphere. It was concluded that a thin layer of hydrozincite or smithsonite, depending upon the degree of stabilization of crystal surface, was probably formed.