Preparation of Zn-Al layered double hydroxide thin films intercalated with anionic dyes through the sol-gel process with hot water treatment

Abstract

Zn-Al layered double hydroxide (LDH) thin films intercalated with various organic anionic dyes were prepared by immersion of sol-gel derived amorphous Al2O3-ZnO thin films in hot water containing organic dyes like Brilliant blue FCF, Fast green FCF, and Bordeaux S. In all the systems, extended interlayer spacing of the Zn-Al LDH was observed after immersion in distilled water with the organic salts in comparison to the LDH with carbonate anions, indicating that we have succeeded in direct formation of Zn-Al LDH films with various organic anionic dyes on the substrates.