|
KMID : 1024520070160121431
|
|
Journal of the Environmental Sciences
2007 Volume.16 No. 12 p.1431 ~ p.1437
|
|
|
Synthesis of CoTiOx and Its Catalytic Activity in Continuous Wet TCE Oxidation
|
|
Kim Moon-Hyeon
|
|
|
Abstract
|
|
|
|
Cobalt titanates(), such as and , have been synthesized via a solid-state reaction and characterized using X-ray diffraction(XRD) and X-ray photoelectron spectroscopic(XPS) measurement techniques, prior to being used for continuous wet trichloroethylene(TCE) oxidation at , to support our earlier chemical structure model for Co species in 5 wt% (fresh) and(spent) catalysts. Each XRD pattern for the synthesized and was very close to those obtained from the respective standard XRD data files. The two samples gave Co 2p XPS spectra consisting of very strong main peaks for Co and with corresponding satellite structures at higher binding energies. The Co main structure appeared at 781.3 eV for the , and it was indicated at 781.1 eV with the . Not only could these binding energy values be very similar to that exhibited for the 5 wt% (fresh), but the spin-orbit splitting() had also no noticeable difference between the cobalt titanates and a sample of the fresh catalyst. Neither of all the samples were active for the wet TCE oxidation, as expected, but a sample of pure had a good activity for this reaction. The earlier proposed model for the surface species existing with the fresh and spent catalysts is very consistent with the XPS characterization and activity measurements for the cobalt titanates.
|
|
|
KEYWORD
|
|
|
Cobalt Titanates, Solid-State Reaction, Trichloroethylene, X-ray Photoelectron Spectroscopy, Continuous Wet Oxidation
|
|
|
FullTexts / Linksout information
|
|
|
|
|
|
Listed journal information
|
|
|
|