Enhanced photoelectrochemical properties of TiO{sub 2} by codoping with tungsten and silver

Journal Article · Mon Apr 21 04:00:00 EDT 2014 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4871977· OSTI ID:22273563

Khan, Matiullah ^[1]; Jiang, Peng; Cao, Wenbin ^[1]; Li, Jing ^[2]

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1. Department of Inorganic Nonmetallic Materials, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083 (China)
2. State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083 (China)

The Tungsten (W) and Silver (Ag) codoped TiO{sub 2} samples were successfully synthesized by hydrothermal method without any post calcination. To understand the correlation between electronic structure and photocatalytic properties, the synthesized samples were characterized using X-ray diffraction, Brunauer–Emmett–Teller specific surface area, transmission electron microscopy, ultra-violet–visible absorption spectra, and X-ray photoelectron spectroscopy (XPS), and the photocatalytic properties were evaluated under visible light irradiations. Codoping could not induce any changes in the phase and all the synthesized samples displayed pure anatase phase with spherical morphology. Visible light absorptions of the codoped samples were dramatically improved compared to the corresponding mono-doped samples. XPS analysis indicated that the dopant atoms successfully entered the TiO{sub 2} network. Results from the visible light photodegradation experiments showed that tungsten-silver codoped TiO{sub 2} possessed strong ability in photo-degrading methylene blue compared to tungsten doped TiO{sub 2} and silver doped TiO{sub 2}, which was attributed to the smaller particle size, higher specific surface area, enhanced visible light absorption, and improved separation of photogenerated carriers.

• OSTI ID: 22273563
• Journal Information: Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 15 Vol. 115; ISSN JAPIAU; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ABSORPTION SPECTRA
CALCINATION
CHARGE CARRIERS
COMPARATIVE EVALUATIONS
DOPED MATERIALS
ELECTRONIC STRUCTURE
HYDROTHERMAL SYNTHESIS
METHYLENE BLUE
PARTICLE SIZE
SILVER
SPECIFIC SURFACE AREA
TITANIUM OXIDES
TRANSMISSION ELECTRON MICROSCOPY
TUNGSTEN
VISIBLE RADIATION
X-RAY DIFFRACTION
X-RAY PHOTOELECTRON SPECTROSCOPY