Ozone decomposition by mesoporous LnOx/MnOx catalysts derived from Mn-BTC under humid conditions

Mesoporous MnO x -Y and LnO x /MnO x ozone decomposition catalysts were prepared by calcination of Mn-BTC (BTC = 1,3,5-benzentricarboxylate) and doping of lanthanide elements (Ln = La, Ce, Sm, Eu, Er). Compared to MnO x -Y catalysts, the LnO x /MnO x catalysts showed higher ozone catalytic activity, the mutual conversion between Ln n+ and Mn n+ was helpful to improve ozone decomposition. The CeO x /MnO x catalyst showed the highest catalytic that showed 93% conversion of 40 ppm O 3 in the relative humidity (RH) = 65% after 360 min, which was attributed to the largest specific surface area, more oxygen vacancies , Mn 3+ and O ads . In addition, the CeO x /MnO x catalyst was loaded into the non-woven fabric to obtain CeO x /MnO x -NWF catalyst, which showed a highly efficient and stable ozone conversion under the RH range from less than 5%–85%. This work will promote the practical application of Mn-BTC derived catalysts.