The catalytic materials were developed from metal-organic frameworks (MOFs) that contain transition metal ions such as Ce, Cu, Zr, V, Cr, Mn, Fe, Co, and Ni ions. The preparation conditions (e.g., temperature, atmosphere and duration) were well-defined to obtain metal oxide catalysts with controllable morphologies. The methodology avoided the aggregation of nanoparticles and kept the porous structure. The MOF-derived catalysts exhibited high reactivity in the low-temperature catalytic decomposition of volatile organic compounds (VOCs). The light-off temperatures were all lower than 200 °C for MnOx, Co3O4, CuO, and CeO2 derived from Mn-BDC, ZIF-67, CuBDC, and CeBDC, respectively. Ceria catalyst with a unique hierarchical structure developed from parallelepiped Ce-MOF material degraded VOCs (e.g., toluene, cyclohexane, o-xylene, methanol and acetone) at temperatures lower than 150 °C. The extraordinary catalytic performance is due to the high specific surface area, large number of surface defects and oxygen vacancies, as well as good reducibility. The activity and selectivity are comparable to the working noble metal supported catalysts, providing a new perspective for developing efficient low-cost catalysts for VOCs abatement.

Catalytic materials derived from MOFs for low-temperature VOC remediation

2019 Fall National Meeting

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