Direct Synthesis of Novel Sponge-Like Porous MnOx Catalysts Derived from Mn-MOFs for High-Efficiently Eliminate o-Dichlorobenzene by Catalytic Combustion

A series of novel lamellar sponge-like MnOx porous catalysts derived from Mn-MOFs have been prepared via modulator-assisted synthesis method and their catalytic performance has been evaluated for o-dichlorobenzene (o-DCB) catalytic combustion reaction. The catalysts were characterized by BET, XRD, Raman, SEM, TEM, XPS, H2-TPR, O2-TPD and other techniques to test the physicochemical properties of the catalysts. The results showed that MnOx had different morphology and properties. The active oxygen species and large specific surface area of MnOx played an important role in the catalytic combustion of o-dichlorobenzene. The T90 of the laminar catalyst MnOx-D, MnOx-D/M, MnOx-D/H/M, and MnOx-D/H was 321, 341, 346, and 355 °C, respectively. MnOx-D has good catalytic activity for the catalytic combustion of o-DCB, which confirmed that surface lattice oxygen played a crucial role in o-DCB combustion. Additionally, they had good hydrothermal stability, thermal stability and water resistance.