Effect of molybdenum on the structure and performance of V2O5/TiO2–SiO2–MoO3 catalysts for the oxidative degradation of o-chlorotoluene

[Display omitted] V/TiO2–SiO2–MoO3 (TSM) catalysts exhibit enhanced redox capabilities, but the role of each species in the mixed oxide support is not well understood. Herein, the physicochemical characteristics of molybdenum oxide in TSM were investigated using X-ray diffraction, X-ray photoelectro...

Full description

Saved in:
Bibliographic Details
Published in:Applied catalysis. A, General General, 2020-04, Vol.595, p.117496, Article 117496
Main Authors: Kuma, Ryoji, Kitano, Tomoyuki, Tsujiguchi, Takuya, Tanaka, Tsunehiro
Format: Article
Language:English
Subjects:
Anatase
Catalysts
Chlorotoluene
Decomposition reactions
Dioxins
Electron transfer
Fine structure
Low temperature
Molybdenum
Molybdenum oxides
Molybdenum trioxide
o-Chlorotoluene
Photoelectrons
Silicon dioxide
Solid solutions
Spectrum analysis
Titanium dioxide
V2O5/TiO2–SiO2–MoO3
Vanadium
Vanadium pentoxide-Titanium dioxide
X ray absorption
X ray photoelectron spectroscopy
XAFS
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:[Display omitted] V/TiO2–SiO2–MoO3 (TSM) catalysts exhibit enhanced redox capabilities, but the role of each species in the mixed oxide support is not well understood. Herein, the physicochemical characteristics of molybdenum oxide in TSM were investigated using X-ray diffraction, X-ray photoelectron spectroscopy, and X-ray absorption fine structure spectroscopy, and the performance of V/TSM catalysts for the oxidative decomposition of o-chlorotoluene was examined. The V/TSM catalysts exhibited superior performances in this decomposition reaction at low temperatures. The molybdenum species were highly dispersed as Mo6+, replacing Ti4+ in the anatase TiO2 framework and forming a solid solution. The redox capability of the vanadium species in the catalyst was enhanced by electron transfer from the TSM support to vanadium, likely due to the coexistence of Mo6+ and Ti4+ in the TSM solid solution, which has a unique structure. These results are expected to contribute to enhancing the abatement of dioxins at low temperatures.
ISSN:0926-860X
1873-3875
DOI:10.1016/j.apcata.2020.117496