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Photoelectrochemical Reactivity of a Hybrid Electrode Composed of Polyoxophosphotungstate Encapsulated in Titania Nanotubes
Author(s) -
Xie Y. B.
Publication year - 2006
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.200500695
Subject(s) - materials science , photocurrent , electrode , chemical engineering , photocatalysis , anodizing , nanotube , photoelectrochemistry , nanotechnology , calcination , titanium , scanning electron microscope , titanium oxide , titanium dioxide , fourier transform infrared spectroscopy , optoelectronics , carbon nanotube , electrochemistry , composite material , catalysis , aluminium , biochemistry , chemistry , engineering , metallurgy
A polyoxometalate‐modified titania hybrid electrode with a tailored microstructure is studied for its photoelectrochemical applications. A highly ordered TiO 2 nanotube array is prepared by low‐voltage anodization followed by calcination. Functionalized polyoxophosphotungstate–titania/titanium (POW–TiO 2 /Ti) hybrid electrodes are synthesized by encapsulating POW nanoaggregates in the TiO 2 nanotube array. The morphological characteristics and structures of POW–TiO 2 composites are examined by field‐emission scanning electron microscopy, X‐ray diffraction, energy dispersive X‐ray spectroscopy, and Fourier transform IR spectroscopy. The photoelectrochemical properties of the POW–TiO 2 /Ti electrodes are investigated by anodic polarization photocurrent‐response measurements. Photocatalytic/photoelectrocatalytic reactivities of microstructured and nanotubular POW–TiO 2 /Ti photoanodes are studied for their use in the degradation of recalcitrant organic pollutants.