Amine-Functionalized Titanosilicates Prepared by the Sol−Gel Process as Adsorbents of the Azo-Dye Orange II

Amino-functionalized titanosilicate materials were prepared as an alternative for developing efficient adsorbents of azo dyes. Functionalization of the titanosilicates with ethylenediamine groups was carried out via the sol−gel process, using the hydrolytic route. The obtained xerogels were characte...

Full description

Saved in:
Bibliographic Details
Published inIndustrial & engineering chemistry research Vol. 50; no. 1; pp. 239 - 246
Main Authors Marçal, L, de Faria, E. H, Saltarelli, M, Calefi, P. S, Nassar, E. J, Ciuffi, K. J, Trujillano, R, Vicente, M. A, Korili, S. A, Gil, A
Format Journal Article
LanguageEnglish
Published Washington, DC American Chemical Society 05.01.2011
Subjects
Applied Chemistry
Applied sciences
Chemical engineering
Exact sciences and technology
Sol gel process
Azo dye
Online AccessGet full text

Cover

More Information
Summary:Amino-functionalized titanosilicate materials were prepared as an alternative for developing efficient adsorbents of azo dyes. Functionalization of the titanosilicates with ethylenediamine groups was carried out via the sol−gel process, using the hydrolytic route. The obtained xerogels were characterized by thermal analysis, elemental chemical analysis, infrared absorption spectroscopy, textural analysis, transmission electron microscopy, and energy-dispersive X-ray spectroscopy. Adsorption of the azo dye Orange II from aqueous solutions by the functionalized titanosilicate materials was investigated by adsorption isotherms and kinetic studies. The Langmuir and Freundlich adsorption models were applied to describe the experimental isotherms and to obtain the isotherm constants.
ISSN:0888-5885
1520-5045
DOI:10.1021/ie101650h