Photocatalytic characteristics of TiO2 supported on SiO2

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Abstract

The photocatalytic decomposition of acetaldehyde was carried out on TiO2/SiO2. The presence of a support (SiO2) in TiO2/SiO2 helped to promote the efficiency of the photocatalyst. The silica support enhanced the effective surface area of TiO2 and adsorption of acetaldehyde on TiO2/SiO2. TiO2/SiO2 synthesized from Ti(SO4)2 showed promoting effect on acetaldehyde decomposition. The XPS results revealed that TiO2/SiO2 prepared with Ti(SO4)2 generated SO42- sites on the TiO2 surface. The increased acidity could promote the adsorption of acetaldehyde and photocatalytic degradation of acetaldehyde. The sulfate ion seemed to generate the bifunctional sites (acid sites and photoactive sites) and promoted the acetaldehyde decomposition on TiO2/SiO2.

Original languageEnglish
Pages (from-to)849-859
Number of pages11
JournalResearch on Chemical Intermediates
Volume29
Issue number7-9
DOIs
Publication statusPublished - 2003 Dec 1

All Science Journal Classification (ASJC) codes

  • Chemistry(all)

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