Influence of Mn valence state and characteristic of TiO2 on the performance of Mn?Ti catalysts in ozone decomposition

Title
Influence of Mn valence state and characteristic of TiO2 on the performance of Mn?Ti catalysts in ozone decomposition
Authors
권동욱김거종원종민홍성창
Issue Date
2017-01
Publisher
Environmental technology
Citation
VOL 38, NO 22-2792
Abstract
The effects of physicochemical properties of Mn-Ti catalysts on O-3 conversion were examined. The catalysts were prepared by a wet impregnation method that gave manganese supported on various commercial sources of TiO2. The properties of the catalysts were studied using physicochemical techniques, including Brunauer-Emmett-Teller (BET) surface area analysis, X-ray diffraction (XRD), H-2 temperature-programmed reduction (H-2-TPR), X-ray photoelectron spectroscopy (XPS), and thermal gravimetric analysis (TGA). The O-3 decomposition tests of Mn-Ti catalysts with various manganese loadings revealed that the 10 wt% manganese catalyst exhibited optimal, excellent activity. The O-3 conversion and Mn valence state of the Mn-Ti catalysts were different, depending on the structure of the TiO2 source. Increasing the O/Ti surface atomic ratio in TiO2 increased the Mn3+ ratio. The Mn3+ ratio directly affected the O-3 decomposition activity of the Mn-Ti catalyst. When the Mn3+ ratio was the largest, the catalyst showed the highest activity in O-3 decomposition. The valence state of Mn exposed to the surface was a critical factor in O-3 decomposition by Mn-Ti catalysts.
URI
http://pubs.kist.re.kr/handle/201004/68154
ISSN
0959-3330
Appears in Collections:
KIST Publication > Article
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE