Mesoporous CeOx/MnOx catalyst derived from Mn-BTC for ozone catalytic decomposition

Abstract

Mesoporous 10CeOx/MnOx-Y catalysts were successfully prepared by doping Ce and calcining Mn-BTC (BTC = 1,3,5-benzenetricarboxylate) for ozone catalytic decomposition. The 10CeOx/MnOx-300 catalyst exhibited the highest catalytic activity under the relative humidity (RH) range from less than 5–65 %, giving 100 % conversion of 40 ppm O3 after 6 h. Series of physicochemical characterizations including XRD, TG, SEM, HR-TEM, ICP-OES, BET, XPS and H2-TPR were introduced the relationship of calcination temperature, catalysts structure and ozone catalytic performance. The results demonstrated that the 10CeOx/MnOx-300 catalyst had the highest Mn3+/Mn4+ and Oads/Olatt ratios and the largest specific surface compared with those of other samples, which are crucial to decompose ozone. In addition, better dispersion of crystals, larger pore volume, more oxygen vacancies, and better low-temperature reducibility are also conducive to ozone decomposition. This research establishes the basis for the application of manganese-based MOFs for ozone decomposition.