Facile synthesis of amorphous mesoporous manganese oxides for efficient catalytic decomposition of ozone

Abstract

Amorphous mesoporous manganese oxides (MnOx) with different microstructures were synthesized via a facile redox method between manganese acetate and potassium permanganate by modulating the addition sequence of the precursors and directly used for catalytic decomposition of ozone.

Effective low‐temperature catalytic abatement of benzene over porous Mn‐Ni composite oxides synthesized via the oxalate route

“…Figure (a) depicts the O 2 ‐TPD curves of the gained catalysts and it can be seen that each curve consists of two different peaks. According to the literature, peaks at temperatures <400 °C are commonly believed to be the desorption of surface‐adsorbed oxygen species (O 2 − and O − ) that are related to the oxygen vacancies in metal oxides, whereas those peaks at temperatures higher than 400 °C can be assigned to the desorption of lattice oxygen species (O 2− ) . As seen in Fig.…”

“…According to the literature, peaks at temperatures <400 ∘ C are commonly believed to be the desorption of surface-adsorbed oxygen species (O 2 − and O − ) that are related to the oxygen vacancies in metal oxides, whereas those peaks at temperatures higher than 400 ∘ C can be assigned to the desorption of lattice oxygen species (O 2− ). 37,38 As seen in Fig. 7(a), both adsorbed oxygen species and lattice oxygen species of Ni-containing catalysts showed lower desorption temperatures than those of MnO x , implying looser bonding of oxygen species to the Mn-Ni composite oxides.…”

Gram-scale synthesis of ultra-fine Cu2O for highly efficient ozone decomposition

“…The active components of the catalyst mainly include noble metals [13][14][15] and transition metal oxides. [16][17][18][19] Imamura et al reported that p-type semiconductors have higher decomposition efficiency for ozone than n-type semiconductors. 20 Oyama measured the conductivity of the catalyst by the Hall effect and compared the correlation between oxide activity and conductivity, thereby further conrming that the p-type semiconductor oxide has higher activity for the catalytic decomposition of ozone.…”

Facile bile salt-induced synthesis of porous MnO2 nanoflowers: applications in dye removal and oxidation

“…Recently, MnO 2 have been prepared by reduction of KMnO 4 with MnSO 4 .H 2 O via a hydrothermal method and used for catalytic oxidation of HCHO [26], ozone decomposition [27], etc.…”