Content area

Abstract

Translate

Titania was prepared by the sol-gel method from titanium alkoxide. Depending on the pH of the gelling solution, specific surface areas between 88 and 10 m2/g were obtained. The band gap (Eg) of the samples was found between 3.05 and 3.32 eV. In samples gelled at pH5 and 9 and calcined at 400°C only anatase phase is observed, while for pH3 and pH7 brookite, anatase and rutile or anatase-rutile phases coexist. It was found that the photoactivity in the 2,4-dinitroanailine decomposition depends on the Eg and on the crystalline phases. The highest activity corresponds to the catalysts having the lowest Eg and more than one crystalline phases co-existing.

Details

Subject
Crystal structure;
Catalytic activity;
Sol-gel processes;
Anatase;
Phases;
Brookite;
Titanium dioxide;
Catalysis;
Photocatalysis;
Gelation;
Rutile;
Crystallinity;
Catalysts;
Decomposition
Identifier / keyword
2; Titania; Catalysis; Photocatalysis; Titanium dioxide; 4-dinitroaniline decomposition; titania band gap; titania x-ray diffraction; titania sol-gel preparation
Title
Photocatalytic Activity in the 2,4-Dinitroaniline Decomposition Over TiO2 Sol-Gel Derived Catalysts
Author
Lopez, Tessy 1 ; Gomez, R 1 ; Sanchez, E 2 ; Tzompantzi, F 2 ; Vera, L 2 

1  Department of Chemistry, Universidad Autonoma Metropolitana-Iztapalapa, DF, 
2  Tecnologico de Estudios Superiores de Ecatepec, Ecatepec Edo. de Mexico, 
Publication title
Journal of Sol-Gel Science and Technology; New York
Volume
22
Issue
1-2
Pages
99-107
Publication year
2001
Publication date
Sep 2001
Publisher
Springer Nature B.V.
Place of publication
New York
Country of publication
Netherlands
Publication subject
Engineering--Engineering Mechanics And Materials, Physics
ISSN
09280707
e-ISSN
15734846
Source type
Scholarly Journal
Language of publication
English
Document type
Journal Article
Publication history
 
 
Milestone dates
2004-10-07 (Registration)
DOI
https://doi.org/10.1023/A:1011272521955
ProQuest document ID
2259558316
Document URL
https://www.proquest.com/scholarly-journals/photocatalytic-activity-2-4-dinitroaniline/docview/2259558316/se-2?accountid=208611
Copyright
Journal of Sol-Gel Science and Technology is a copyright of Springer, (2001). All Rights Reserved.
Last updated
2023-11-28
Database
ProQuest One Academic