The performance and reaction pathway of δ-MnO2/USY for catalytic oxidation of toluene in the presence of ozone at room temperature

In this work, a series of delta-MnO2/USY with different contents of delta-MnO2 (0.3 wt%, 1.5 wt%, 3.0 wt%, 10.0 wt %, and 15.0 wt%) were prepared. In addition, their performances of the adsorption of toluene, degradation and mineralization of toluene, and removal of ozone (O-3) were investigated. The results showed that, among all the samples, 3.0 wt% delta-MnO2/USY displayed the best performance of toluene adsorption, degradation and mineralization. Furthermore, according to the in situ DRIFTS and GC-MS analysis, the intermediate by-products during the toluene degradation progress were ascertained and the possible pathway of catalytic oxidation toluene by delta-MnO2/USY in the presence of O-3 was proposed. (C) 2020 Elsevier Ltd. All rights reserved.