Preparation of Surface-Modified TiO2 Nanoflower Film as Efficient Visible-Active Photocatalysts

Ya Hui Wu; Ming Ce Long; Chao Chen; Wei Min Cai

doi:10.4028/www.scientific.net/AMR.214.406

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Preparation of Surface-Modified TiO₂ Nanoflower Film as Efficient Visible-Active Photocatalysts
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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 214Preparation of Surface-Modified TiO2 Nanoflower...

Preparation of Surface-Modified TiO₂ Nanoflower Film as Efficient Visible-Active Photocatalysts

Abstract:

The TiO2 films were synthesized on Ti substrates by a novel method. Titanium metal was directly oxidized by hydrogen peroxide to generate a rough amorphous film and then hydrothermal process transformed the film to crystalline nanoflower TiO2 film. The obtained film can be modified by calcination with urea and the modified film can keep the nanoflower structure. According to the XPS data, the urea-induced modification is surface-modification rather than N-doping. Compared to the un-modified film, the response scope of the modified film extends to the visible light region. Photocatalytic activity of films were investigated by degrading methyl orange (MO) under visible light. As a result, 47% of MO was decomposed by modified film in 3 hours.

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Periodical:

Advanced Materials Research (Volume 214)

Pages:

406-411

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.214.406

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Online since:

February 2011

Authors:

Ya Hui Wu, Ming Ce Long, Chao Chen, Wei Min Cai

Keywords:

Hydrogen Peroxide, Nanoflower, Titania, Titanium, Urea, Visible Active Photocatalysts

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