Preparation and characterization of SiO2–TiO2 neutral sol by peroxo sol–gel method and its application on photocatalytic degradation

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Title:	Preparation and characterization of SiO2–TiO2 neutral sol by peroxo sol–gel method and its application on photocatalytic degradation
Authors:	陳郁文;Moongraksathum, Benjawan;Chen, Yu-Wen
Contributors:	工學院化學工程與材料工程學系
Keywords:	Anatase;Catalytic activity;Ceramics;Chemistry and Materials Science;Composites;Dip coatings;Glass;Glass substrates;High aspect ratio;Immersion coating;Inorganic Chemistry;Materials Science;Methylene blue;Nanoparticles;Nanotechnology;Natural Materials;Optical and Electronic Materials;Original Paper;Photocatalysis;Photodegradation;Protective coatings;Silicon dioxide;Sol-gel processes;Surfactants;Titanium dioxide
Date:	2016-02-01
Issue Date:	2026-04-21 14:48:20 (UTC+8)
Publisher:	Springer Netherlands;New York: Springer US
Abstract:	摘要： A bifunctional SiO 2 –TiO 2 material for antireflection and photocatalytic degradation was prepared by peroxo sol–gel method. The as-prepared sols have the following unique properties: (1) they can contain crystalline anatase nanoparticles without subsequent calcinations process and (2) they are very stable even without the presence of any protecting surfactant (i.e., no aggregation even after 1 year). The particle size of TiO 2 decreased as the SiO 2 content increased. The aspect ratio of TiO 2 particle also increased with increasing SiO 2 content. The SiO 2 –TiO 2 sol was neutral or slightly basic. SiO 2 –TiO 2 sol prepared by the presenting peroxo sol–gel method possesses several advantages, i.e., small TiO 2 particles in nanometer scale, high aspect ratio of TiO 2 , the lack of need for any surfactant, non-acidity and the lack of need for any annealing processes. The as-prepared sol can be used as a coating precursor on any substrate, and SiO 2 –TiO 2 films were successfully coated on glass substrates by dip-coating method. The as-deposited films were subjected to drying at 80 °C in air. The transmittance of the SiO 2 –TiO 2 -coated glass increased by 4 %, as compared to the bare glass. Photocatalytic degradation of methylene blue in water was carried out under UVA (365 nm) and UVC (254 nm) irradiation with the presence of the SiO 2 –TiO 2 films as catalysts. The results showed that the presence of SiO 2 in TiO 2 films would improve the photocatalytic activity, as compared to bare TiO 2 film. In addition, the fabricated SiO 2 –TiO 2 films showed high anti-reflection and high photocatalytic activity than bare TiO 2 films. Graphical Abstract 其他題名： J Sol-Gel Sci Technol 出版者： New York: Springer US 出版日期： 2016-02-01 出處： Journal of sol-gel science and technology, 2016-02, Vol.77 (2), p.288-297 版權： Springer Science+Business Media New York 2015 版權： Journal of Sol-Gel Science and Technology is a copyright of Springer, (2015). All Rights Reserved. 識別號： ISSN: 0928-0707 識別號： EISSN: 1573-4846 識別號： DOI: 10.1007/s10971-015-3853-7
Appears in Collections:	[Department of Chemical and Materials Engineering] journal & Dissertation

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