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Title: The microwave effect on the properties of silica-coated TiO{sub 2} fine particles prepared using sol-gel method

Abstract

The silica coating of TiO{sub 2} fine particle was conducted using microwave assisted sol-gel method and conventional sol-gel method to suppress its photo-catalytic activity. The amount and uniformity of silica coating on TiO{sub 2} surface were characterized by X-ray photoelectron spectroscopy (XPS), X-ray fluorescence spectroscopy (XRF), infrared spectroscopy (IR), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and zeta potential measurements. XPS and XRF results showed that the presence of catalyst and reaction time were important factors to reach high silica amounts. SEM, TEM, and zeta potential results indicated that dense film coating of SiO{sub 2} layer formed on TiO{sub 2} surface in conventional sol-gel method, whereas the nucleation coating was observed on sample prepared by microwave assisted sol-gel method. When photo-catalytic activities and ultraviolet (UV) shielding abilities of these samples were evaluated, the sample prepared by microwave processing showed higher inhibition of photo-catalytic activity and better UV shielding ability than the sample prepared by conventional method. These results suggested that the coating method significantly affected the photo-catalytic activity and UV shielding ability of coated TiO{sub 2}.

Authors:
 [1]; ; ;  [2];  [3]
  1. Department of Applied Chemistry, Faculty of Engineering, Utsunomiya University, Yoto 7-1-2, Utsunomiya 321-8585 (Japan)
  2. Department of Information and Control Systems Science, Graduate School of Engineering, Utsunomiya University, Yoto 7-1-2, Utsunomiya 321-8585 (Japan)
  3. Department of Information and Control Systems Science, Graduate School of Engineering, Utsunomiya University, Yoto 7-1-2, Utsunomiya 321-8585 (Japan), E-mail: suzukin@cc.utsunomiya-u.ac.jp
Publication Date:
OSTI Identifier:
21068247
Resource Type:
Journal Article
Journal Name:
Materials Research Bulletin
Additional Journal Information:
Journal Volume: 43; Journal Issue: 4; Other Information: DOI: 10.1016/j.materresbull.2007.04.031; PII: S0025-5408(07)00183-3; Copyright (c) 2007 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0025-5408
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ABSORPTION SPECTROSCOPY; INFRARED SPECTRA; MICROWAVE RADIATION; PHOTOCATALYSIS; SCANNING ELECTRON MICROSCOPY; SILICA; SILICON OXIDES; SOL-GEL PROCESS; SURFACE PROPERTIES; TITANIUM OXIDES; TRANSMISSION ELECTRON MICROSCOPY; X-RAY FLUORESCENCE ANALYSIS; X-RAY PHOTOELECTRON SPECTROSCOPY

Citation Formats

Furusawa, Takeshi, Honda, Kozue, Ukaji, Emi, Sato, Masahide, and Suzuki, Noboru. The microwave effect on the properties of silica-coated TiO{sub 2} fine particles prepared using sol-gel method. United States: N. p., 2008. Web. doi:10.1016/j.materresbull.2007.04.031.
Furusawa, Takeshi, Honda, Kozue, Ukaji, Emi, Sato, Masahide, & Suzuki, Noboru. The microwave effect on the properties of silica-coated TiO{sub 2} fine particles prepared using sol-gel method. United States. doi:10.1016/j.materresbull.2007.04.031.
Furusawa, Takeshi, Honda, Kozue, Ukaji, Emi, Sato, Masahide, and Suzuki, Noboru. Tue . "The microwave effect on the properties of silica-coated TiO{sub 2} fine particles prepared using sol-gel method". United States. doi:10.1016/j.materresbull.2007.04.031.
@article{osti_21068247,
title = {The microwave effect on the properties of silica-coated TiO{sub 2} fine particles prepared using sol-gel method},
author = {Furusawa, Takeshi and Honda, Kozue and Ukaji, Emi and Sato, Masahide and Suzuki, Noboru},
abstractNote = {The silica coating of TiO{sub 2} fine particle was conducted using microwave assisted sol-gel method and conventional sol-gel method to suppress its photo-catalytic activity. The amount and uniformity of silica coating on TiO{sub 2} surface were characterized by X-ray photoelectron spectroscopy (XPS), X-ray fluorescence spectroscopy (XRF), infrared spectroscopy (IR), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and zeta potential measurements. XPS and XRF results showed that the presence of catalyst and reaction time were important factors to reach high silica amounts. SEM, TEM, and zeta potential results indicated that dense film coating of SiO{sub 2} layer formed on TiO{sub 2} surface in conventional sol-gel method, whereas the nucleation coating was observed on sample prepared by microwave assisted sol-gel method. When photo-catalytic activities and ultraviolet (UV) shielding abilities of these samples were evaluated, the sample prepared by microwave processing showed higher inhibition of photo-catalytic activity and better UV shielding ability than the sample prepared by conventional method. These results suggested that the coating method significantly affected the photo-catalytic activity and UV shielding ability of coated TiO{sub 2}.},
doi = {10.1016/j.materresbull.2007.04.031},
journal = {Materials Research Bulletin},
issn = {0025-5408},
number = 4,
volume = 43,
place = {United States},
year = {2008},
month = {4}
}