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Title: The influence of surfactants on the roughness of titania sol-gel films

Abstract

Substrate dipping in a composite sol-gel solution was used to prepare both smooth and rough thin films of titanium dioxide (TiO{sub 2}) on commercial fiberglass. The deposition of a composite film was done in a beaker using a solution of titanium (IV) isopropoxide as the sol-gel precursor and cetyltrimethyl ammonium bromide as the surfactant. In order to establish a correlation between experimental conditions and the titanium oxide produced, as well as the film quality, the calcined samples were characterized using Raman spectroscopy, UV-vis spectrophotometry, scanning electron microscopy and atomic force microscopy. One of the most important results is that a 61-nm TiO{sub 2} film was obtained with a short immersion of fiberglass into the sol-gel without surfactant. In other cases, the deposited film consisted of a titanium precursor gel encapsulating micelles of surfactant. The gel films were converted to only the anatase phase by calcining them at 500 deg. C. The resulting films were crystalline and exhibited a uniform surface topography. In the present paper, it was found that the TiO{sub 2} films prepared from the sol-gel with a surfactant showed a granular microstructure, and are composed of irregular particles between 1.5 and 3 {mu}m. Smooth TiO{sub 2} films couldmore » have useful optical and corrosion-protective properties and, on other hand, roughness on the TiO{sub 2} films can enhance the inherent photocatalytic activity.« less

Authors:
 [1];  [2];  [3];  [4];  [5]
  1. Departamento de Ingenieria Quimica y Bioquimica, Instituto Tecnologico de Aguascalientes, Av. A. Lopez Mateos Ote. No. 1801, Fracc. Bona Gens, Aguascalientes 20256 (Mexico). E-mail: jormeval@yahoo.com
  2. Centro de Investigaciones en Optica A.C., Loma del Bosque No. 115, Col. Lomas del Campestre, Leon, Gto. 37150 (Mexico). E-mail: cfraus@cio.mx
  3. Centro de Investigaciones en Optica A.C., Loma del Bosque No. 115, Col. Lomas del Campestre, Leon, Gto. 37150 (Mexico). E-mail: scalixto@cio.mx
  4. Instituto de Investigaciones en Materiales, Universidad Nacional Autonoma de Mexico, Circuito Exterior s/n, Cd. Universitaria, Mexico, D.F. 04510 (Mexico). E-mail: croqcroqcroq@yahoo.com
  5. Universidad Autonoma Metropolitana-Iztapalapa, Av. San Rafael Atlixco No. 186, Mexico, D.F. 09340 (Mexico). E-mail: lacv@xanum.uam.mx
Publication Date:
OSTI Identifier:
21003536
Resource Type:
Journal Article
Resource Relation:
Journal Name: Materials Characterization; Journal Volume: 58; Journal Issue: 3; Other Information: DOI: 10.1016/j.matchar.2006.04.021; PII: S1044-5803(06)00122-7; Copyright (c) 2006 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; AMMONIUM COMPOUNDS; ATOMIC FORCE MICROSCOPY; BROMIDES; CORRELATIONS; CORROSION; FIBERGLASS; MICROSTRUCTURE; PHOTOCATALYSIS; RAMAN SPECTROSCOPY; ROUGHNESS; SCANNING ELECTRON MICROSCOPY; SOL-GEL PROCESS; SPECTROPHOTOMETRY; SUBSTRATES; SURFACTANTS; THIN FILMS; TITANIUM OXIDES; TOPOGRAPHY; ULTRAVIOLET SPECTRA

Citation Formats

Medina-Valtierra, Jorge, Frausto-Reyes, Claudio, Calixto, Sergio, Bosch, Pedro, and Hugo Lara, Victor. The influence of surfactants on the roughness of titania sol-gel films. United States: N. p., 2007. Web. doi:10.1016/j.matchar.2006.04.021.
Medina-Valtierra, Jorge, Frausto-Reyes, Claudio, Calixto, Sergio, Bosch, Pedro, & Hugo Lara, Victor. The influence of surfactants on the roughness of titania sol-gel films. United States. doi:10.1016/j.matchar.2006.04.021.
Medina-Valtierra, Jorge, Frausto-Reyes, Claudio, Calixto, Sergio, Bosch, Pedro, and Hugo Lara, Victor. Thu . "The influence of surfactants on the roughness of titania sol-gel films". United States. doi:10.1016/j.matchar.2006.04.021.
@article{osti_21003536,
title = {The influence of surfactants on the roughness of titania sol-gel films},
author = {Medina-Valtierra, Jorge and Frausto-Reyes, Claudio and Calixto, Sergio and Bosch, Pedro and Hugo Lara, Victor},
abstractNote = {Substrate dipping in a composite sol-gel solution was used to prepare both smooth and rough thin films of titanium dioxide (TiO{sub 2}) on commercial fiberglass. The deposition of a composite film was done in a beaker using a solution of titanium (IV) isopropoxide as the sol-gel precursor and cetyltrimethyl ammonium bromide as the surfactant. In order to establish a correlation between experimental conditions and the titanium oxide produced, as well as the film quality, the calcined samples were characterized using Raman spectroscopy, UV-vis spectrophotometry, scanning electron microscopy and atomic force microscopy. One of the most important results is that a 61-nm TiO{sub 2} film was obtained with a short immersion of fiberglass into the sol-gel without surfactant. In other cases, the deposited film consisted of a titanium precursor gel encapsulating micelles of surfactant. The gel films were converted to only the anatase phase by calcining them at 500 deg. C. The resulting films were crystalline and exhibited a uniform surface topography. In the present paper, it was found that the TiO{sub 2} films prepared from the sol-gel with a surfactant showed a granular microstructure, and are composed of irregular particles between 1.5 and 3 {mu}m. Smooth TiO{sub 2} films could have useful optical and corrosion-protective properties and, on other hand, roughness on the TiO{sub 2} films can enhance the inherent photocatalytic activity.},
doi = {10.1016/j.matchar.2006.04.021},
journal = {Materials Characterization},
number = 3,
volume = 58,
place = {United States},
year = {Thu Mar 15 00:00:00 EDT 2007},
month = {Thu Mar 15 00:00:00 EDT 2007}
}