Novel Fe3O4@TiO2 core–shell nanostructure catalyst for NO removal through heterogeneous Fenton processes

Abstract

Diverse Fe3O4@TiO2 catalysts, featuring a range of core-shell ratios, were employed within an H2O2 catalytic activation system to facilitate the oxidation of NO. These catalysts underwent comprehensive structural characterization, including XRD, TEM, BET, XPS, VSM and TPR analysis. Experimental investigations were conducted with the specific goal of assessing the catalytic efficiency of Fe3O4@TiO2 core-shell catalysts and Fe3O4/TiO2 supported catalysts in the contexts of desulfurization and denitrification. The results demonstrated that catalysts featuring a core-shell ratio of 1:2 exhibited the highest catalytic efficiency. Moreover, the core-shell catalysts outperformed their supported counterparts with the same molar ratio in terms of physicochemical properties, removal efficiency, and stability. Notably, the core-shell catalysts possessed exceptionally favorable pore structures and substantial specific surface areas, facilitating enhanced H2O2 activation for NO oxidation through synergistic interactions between the core and shell components. This research holds the potential to guide future endeavors in the development of catalysts aimed at achieving superior H2O2 catalytic efficiency.