AVS 54th International Symposium
    Advanced Surface Engineering Tuesday Sessions
       Session SE-TuP

Paper SE-TuP5
Photocatalysis of Dense and Porous Bilayers of Cuprite and Titania

Tuesday, October 16, 2007, 6:00 pm, Room 4C

Session: Advanced Surface Engineering Poster Session
Presenter: M.H. Wu, National Dong Hwa University, Taiwan
Authors: M.H. Wu, National Dong Hwa University, Taiwan
M.S. Wong, National Dong Hwa University, Taiwan
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Titanium dioxide with anatase phase couples with different materials contributing better or worse photocatalysis. Transferring of electrons and holes in junction is caused by the different energy levels of conduction band and valence band. Dense and porous bilayers of cuprous oxide and titanium dioxide with various microstructures and thickness were prepared by magnetron sputtering and electron beam evaporation with glancing-angle deposition technique. The photocatalysis of the films was tested via photo-degradation of methylene blue. Porous columnar titania films covered with Cu2O layer allow good carrier transfer and high specific surface area, where the photo-generated electrons and holes can be separated and function at different area of the columnar structure, resulting better photocatalytic performance.