Accession Number : AD0746776

Title :   The Effect of Illumination on the Adsorption of Dyes on Zinc Oxide,

Corporate Author : DEFENCE STANDARDS LABS ADELAIDE (AUSTRALIA)

Personal Author(s) : Norman,V. J.

Report Date : 30 NOV 1971

Pagination or Media Count : 5

Abstract : The adsorption of uranine and rhodamine B, from ethanolic solution, onto high-purity polycrystalline zinc oxide has been determined in the dark, in natural room-light, and under ultraviolet irradiation. It is shown that the amount of uranine chemisorbed in room-light is approximately 60% greater than that chemisorbed in the dark. Ultraviolet irradiation effected a threefold increase in the amount of uranine chemisorbed, with a corresponding decrease in physisorption and total adsorption. The adsorption of rhodamine B, which is exclusively chemisorption, is significantly increased in room-light, and is approximately doubled by ultraviolet irradiation. (Author)

Descriptors :   (*ZINC COMPOUNDS, *ADSORPTION), (*DYES, ADSORPTION), CHEMISORPTION, PHOTOCHEMICAL REACTIONS, COLORIMETRIC ANALYSIS, AUSTRALIA

Subject Categories : Physical Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE