Issue 9, 2002
From the journal:

Journal of Materials Chemistry

Photocatalytic properties of Ba3Li2Ti8O20 sol–gel

A. Hernandez,a   L. M. Torres-Martinez,*a   E. Sanchez-Mora,a   T. Lopezb  and  F. Tzompantzib  

* Corresponding authors

a Facultad de Ciencias Quimicas, Division de Estudios Superiores, Universidad Autonoma de Nuevo Leon, A. P. 1625, Monterrey, Nuevo Leon, Mexico
E-mail: ltorres@ccr.dsi.uanl.mx
Fax: (52) (8) 3 74 07 09

b Universidad Autonoma Metropolitana-Iztapalapa, Department of Chemistry, A. P. 55-534, 09340 México D.F., Mexico

Abstract

Samples of Ba3Li2Ti8O20 were prepared by the sol–gel method at pH 3 and 9 using acetic acid and ammonia hydroxide respectively as hydrolysis catalysts. The band gap (Eg) of the solids prepared was calculated from the UV-Vis absorption spectra of samples thermally treated at different temperatures, the values obtained ranging from 3.37 to 3.09 eV. The Eg values of the powders synthesized at pH 9 were higher than those of samples prepared at pH 3. Surface characterization of the solids was carried out from adsorption isotherms and FTIR studies, and their photocatalytic activities on 2,4-dinitroaniline degradation were also measured. The decomposition rate followed Langmuir–Hinshelwood kinetics. According to the calculated kinetic parameters, better results were obtained once the crystalline structure of Ba3Li2Ti8O20 had formed.

Graphical abstract: Photocatalytic properties of Ba3Li2Ti8O20 sol–gel

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Article information

DOI
https://doi.org/10.1039/B109593P
Article type
Paper
Submitted
18 Oct 2001
Accepted
24 Jun 2002
First published
24 Jul 2002

J. Mater. Chem., 2002,12, 2820-2824

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Photocatalytic properties of Ba3Li2Ti8O20 sol–gel

A. Hernandez, L. M. Torres-Martinez, E. Sanchez-Mora, T. Lopez and F. Tzompantzi, J. Mater. Chem., 2002, 12, 2820 DOI: 10.1039/B109593P

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