Abstract
O3 technology has exhibited promise in removing NO at low-temperature. However, challenges of high NO2 concentration that are difficult to absorb due to insufficient O3 oxidizing capacity remains. Herein, we reported an efficient strategy to generate oxygen-containing radicals for NO deep oxidation via fluorine and {001} facets modulated anatase TiO2 triggering highly activity sites that catalyzed O3/H2O2 to address the above issue. The strong electron withdrawing effect of F sites enhanced the deprotonation of H2O2, while Ti5c on {001} surface exhibited strong Lewis acid to activate O3, thermal stabilization treatment of the catalyst strengthened the synergistic effect of F and Ti5c, resulting in a 97 % NO deep oxidation efficiency at 100 °C with 3 % water vapor content. Additionally, the oxidation characteristics of the radicals was carefully discussed by occupying NO adsorption sites on TiO2 surface, the result revealed that radicals could remarkably react with gas-phase NO. Finally, the synergistic effect and oxidation properties would possess guiding significance for improving NO oxidation and applications.
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