Fabrication of titania thin film with composite na

Authors: Gaojie Zhang Jinming Wu Shaoguang Liu Mi Yan

Publish Date: 2008/03/20

Volume: 2, Issue: 1, Pages: 44-48

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Abstract

A titania nanorod filmwas synthesized by direct oxidation of metallic Ti with hydrogen peroxide solution under a low temperature Titania nanoparticles were then filled into the gaps among the nanorods through an infiltration solgel procedure to form a composite titania film with an ordered nanostructure Xray diffraction spectra indicate that the composite film was a mixture of anatase and rutile while the titania film obtained by only using a solgel procedure was pure anatase Field emission scanning electron microscopy observations show that titania nanoparticles were embedded into the titania nanorod film Photoluminescence spectra suggest the enhanced separation of electron and hole pairs for the obtained composite titania film over the corresponding titania nanorod film The composite titania film exhibited improved ability to photodegrade rhodamine B in water compared with the titania nanorod film The apparent photodegradation rate constant fitting a pseudofirstorder was 3 times of that obtained by the solgel derived titania film at the same weight The improved photocatalytic activity for the composite titania film could be attributed to the enhanced separation of electron and hole pairs due to the embedding of the titania nanoparticles within the titania nanorods

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