Photocatalytic characteristics of TiO2 supported on SiO2

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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
Issue number7-9
Publication statusPublished - 2003

Bibliographical note

Funding Information:
This work was supported by Korea Research Foundation Grant (KRF-2001-005-E00030) and Ministry of Science and Technology of Korea through the National Research Laboratory program. In addition, we deeply appreciate the Center for Ultramicrochemical Process Systems (CUPS).

All Science Journal Classification (ASJC) codes

  • Chemistry(all)


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