Preparation of Novel TiO2-Silica Filter Photocatalyst Derived from Titanium Alkoxy-Diolate Precursor

Masaki Naijo; Akira Hasegawa; Noriyoshi Kakuta

doi:10.4028/www.scientific.net/KEM.617.191

Paper Titles

Magnetic and Fluorescent Hybrid Silica Nanoparticles Based on the Co-Encapsulation of γ-Fe₂O₃ Nanocristals and [Mo₆Br₁₄]^2- Luminescent Nanosized Clusters by Water-in-Oil Microemulsion
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Nanohole Coat/Fill with Pt via Chemical Deposition in Supercritical Fluids
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Preparation of CuCrO₂ Powders with High Surface Areas
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Preparation of Novel TiO₂-Silica Filter Photocatalyst Derived from Titanium Alkoxy-Diolate Precursor
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Synthesis and Growth Mechanism of SiC/SiO₂ Core-Shell Nanowires by Thermal Evaporation Method
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Influence of Cu₂O Addition on Crystallization Process and Microstructure of Transparent Mica Glass-Ceramics
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HomeKey Engineering MaterialsKey Engineering Materials Vol. 617Preparation of Novel TiO2-Silica Filter...

Preparation of Novel TiO₂-Silica Filter Photocatalyst Derived from Titanium Alkoxy-Diolate Precursor

Abstract:

Commercially available TiO₂ (Degussa, P-25) is well-known as a highly active photocatalyst. However, in order to work as a photocatalyst, TiO₂ must be dispersed onto a substrate without any binders but this still remains very difficult. We thus attempted to develop a novel TiO₂system with high photocatalytic activity. TiO₂ anchored silica fibers (TAS) were prepared by chemical vapor deposition using titanium (IV) ethoxide and 1,3-butanediol. The content of TiO₂ in TAS was varied from 0.5 to 5 mass%. It was observed that the surface of TAS was covered with anatase TiO₂particles 5-10 nm in diameter. TAS shows higher activity at a lower loading amount compared to P-25. Measurement of the acetaldehyde decomposition rate constant of P-25 and TAS carrying 2 mass% of titanium oxide under ultraviolet irradiation showed a value for TAS that was 1.4 times that of P-25. TAS showed a solid acidity amount higher than the P-25 in NH₃-TPD measurements. It was considered that some Si species from the silica fibers migrated into the TiO₂ layer by calcination, increasing the solid acidity of TAS. As a result, the adsorption of acetaldehyde increased, and the photocatalyst activity improved.

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Periodical:

Key Engineering Materials (Volume 617)

Pages:

191-194

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.617.191

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Online since:

June 2014

Authors:

Masaki Naijo, Akira Hasegawa*, Noriyoshi Kakuta

Keywords:

CVD, Photocatalyst Activity, Titanium Alkoxy-Diolate

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