Fabrication of TiO2/Cu Composite Photocatalyst Thin Film by 2-Step Mechanical Coating Technique and its Photocatalytic Activity

Yun Lu; Liang Hao; Keisuke Toh; Hiroyuki Yoshida

doi:10.4028/www.scientific.net/AMR.415-417.1942

Paper Titles

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 415-417Fabrication of TiO2/Cu Composite Photocatalyst...

Fabrication of TiO₂/Cu Composite Photocatalyst Thin Film by 2-Step Mechanical Coating Technique and its Photocatalytic Activity

Abstract:

A novel TiO₂/Cu composite photocatalyst thin film was successfully fabricated by 2-step Mechanical Coating Technique (2-step MCT). The composite photocatalyst thin film was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), among others. The formation process of Cu thin film and TiO₂/Cu composite photocatalyst thin film were also examined. The results revealed that the formation of Cu thin film can fall into the following stages: nucleation, growth of nuclei and connection, formation and thickening of continuous thin film, and the exfoliation of thin film. In addition, TiO₂/Cu composite thin film had a composite microstructure of TiO₂ islands coated on Cu thin film. Furthermore, the photocatalytic activity of TiO₂/Cu composite photocatalyst thin film was evaluated by measuring the degradation rate of methylene blue (MB). Enhancement on the photocatalytic activity of TiO₂ was confirmed. The improvement of the photocatalytic activity of TiO₂/Cu composite photocatalyst thin film should result from the increase of the charge separation efficiency and the mass increase of TiO₂ in the composite thin film.