Double chemical modification of the rutile surface

✍ Scribed by I.A Polunina; S.S Mikhailova; A.A Isirikyan; N.S Ovchinnikova

• Book ID: 103967280
• Publisher: Elsevier Science
• Year: 1995
• Tongue: English
• Weight: 469 KB
• Volume: 105
• Category: Article
• ISSN: 0927-7757
• DOI: 10.1016/0927-7757(95)03262-2

✦ Synopsis

The successive adsorption of some aliphatic amines and carboxylic acids on titanium dioxide (rutile modification) from their vapors and toluene solutions has been studied. It was found that the efficiency of double modification of TiO2 with different modifiers depends on the sequence of their adsorption. From adsorption measurements and massspectroscopic thermal analysis, it has been shown that when the rutile surface is modified with vapors of n-butylamine and acetic acid, it is possible for the two substances to interact in the surface layer. As a result, the order in which the amine and the acid are adsorbed affects the structure and properties of the resulting adsorbed layers. Both the displacement of the previously adsorbed substance and the formation of new surface compounds are observed. It has been established that the modifying amine layer on rutile with preadsorbed carboxylic acid is the densest. This layer consists of molecules of both the modifiers and the product of their surface reaction.