Enhanced photocatalytic activity of TiO<sub>2</sub> by polydimethylsiloxane deposition and subsequent thermal treatment at 800 °C期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

Enhanced photocatalytic activity of TiO₂ by polydimethylsiloxane deposition and subsequent thermal treatment at 800 °C

Authors:	Myung-Geun JeongHyun Ook Seo Kwang-Dae KimYoung Dok Kim Dong Chan Lim

Affiliation:	^a Department of Chemistry, Sungkyunkwan University, Suwon, 440-746, Korea ^b Materials Processing Division, Korea Institute of Materials Science, Changwon, 641-010, Korea

Abstract:	A thin film of polydimethylsiloxane (PDMS) was coated on TiO₂ nanoparticles (P-25, Dagussa), and surface structures of the thin films were analyzed by Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy. Furthermore, photocatalytic activity of PDMS-coated TiO₂ samples with various annealing temperatures was determined using UV irradiation. We show that the 800 °C-annealed sample of PDMS-coated TiO₂ showed a two-fold higher photocatalytic activity with respect to the bare TiO₂. The enhanced photocatalytic activity was attributed to the greater hydrophilicity of the annealed PDMS coating.

Keywords:	Photocatalysis Evaporation polydimethylsiloxane Titanium Dioxide Powders Hydrophilic Interaction Methylene Blue
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