Decomposition of high-level ozone under high humidity over Mn-Fe catalyst: The influence of iron precursors

摘要

Manganese-iron mixed oxide, an efficient and stable catalyst, has been successfully used in the decomposition of ozone. The influence of different iron precursors on the catalytic decomposition activity of high-level ozone under high-humidity over manganese-iron catalysts prepared using a hydrothermal approach was studied. The catalytic performance over MnFe0.5Ox-Fe(NO3)(3) was much better than that of MnFe0.5Ox-FeSO4 and MnFe0.5Ox-FeCl3. From the results of characterization by N-2 physical adsorption, XRD, XPS and SEM, it was concluded that the largest specific surface area, the lowest crystallinity, the most evenly distributed particle size and the most surface-active Mn2+ and Mn3+ led to the best catalytic activity for the MnFe0.5Ox-Fe(NO3)(3) catalyst. (C) 2014 Elsevier B.V. All rights reserved.