Structure and reactive properties of Nb-impregnated two-dimensional pillared MWW zeolites for total oxidation of volatile organic compounds

In this work, the structure and reactive properties of niobium (Nb)-impregnated MWW-type materials were evaluated for gas-phase total oxidation volatile organic compounds, including BTX (benzene, toluene o -xylene). The role type (two or three-dimensional) loading Nb considered. results indicated most species with a tetrahedral coordination on external surfaces both two- three-dimensional zeolites, together minimal contribution octahedral extra-framework Nb2O5 species. texture content played key in BTX. With same (5 wt%), pillared zeolite exhibited higher specific surface, larger pore volume mesopores between MWW nanosheets when compared to MCM-22 which resulted high accessibility reactant molecules active sites, reflected conversion at lower temperatures (50–300 °C). best performance was achieved (10 wt% Nb), reaching 300 °C 92%, 69% 58%, respectively. catalyst stable up 30 h reaction.