In Situ XANES Study of CuO/TiO2 Thin Films During Photodegradation of Methylene Blue

Journal Article · Fri Feb 02 04:00:00 EST 2007 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2644591· OSTI ID:21054680

Tungli, Hsiung ^[1]; Wang, H Paul ^[1]; Yuling, Wei ^[2]

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1. Department of Environmental Engineering, National Cheng Kung University, Tainan City 70101, Taiwan (China)
2. Department of Environmental Science and Engineering, Tunghai University, Taichung, 407 Taiwan (China)

Speciation of copper in the CuO/TiO2 thin film (synthesized by the doctor-blade deposition method) during photocatalytic decomposition of methylene blue has been studied by in situ X-ray absorption near-edge structural (XANES) spectroscopy. During the UV/VIS radiation (90 min), in the presence of methylene blue, a decrease of Cu(II) and an increases of Cu(0) and Cu(I) fractions in the CuO/TiO2 thin film are observed by in situ XANES. The r-space Fourier transformation EXAFS (extend X-ray absorption fine structural) spectra also show that the bond distance of Cu-O in the thin film is decreased by 0.03 A during photocatalytic degradation of methylene blue.

• OSTI ID: 21054680
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 882; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
ABSORPTION SPECTRA
ABSORPTION SPECTROSCOPY
BOND LENGTHS
COPPER
COPPER OXIDES
DEPOSITION
FINE STRUCTURE
FOURIER TRANSFORMATION
INTERFACES
METHYLENE BLUE
PHOTOCATALYSIS
PHOTOCHEMISTRY
THIN FILMS
TITANIUM OXIDES
X-RAY SPECTRA
X-RAY SPECTROSCOPY