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所属单位：经济与管理学院

发表刊物：SCIENTIFIC REPORTS

关键字：CATALYTIC OZONATION HYDROXYL-GROUPS ALPHA-FEOOH DECOMPOSITION ADSORPTION MECHANISM REMOVAL

摘要：A transformation process of ozone on different iron oxides suspensions, including alpha-Fe2O3, alpha-FeOOH, Fe3O4, was carried out using FTIR of adsorbed pyridine, ATR-FTIR and electron paramagnetic resonance (EPR) spectra with isotope O-1(8)3. It was verified that on the surface isolated hydroxyl groups and the surface hydroxyl groups without acid sites of these iron oxides, ozone was electrostatically adsorbed and did not interact with the surface of these oxides, stably existed as ozone molecule. In contrast, ozone could replace the surface hydroxyl groups on Lewis acid sites of oxides, and directly interacted with the surface metal ions, decomposing into reactive oxygen species (ROS) and initiating the surface metal redox. The results indicate that Lewis acid sites were active center while the electronic cycle of the Fe2+/Fe3+ is advantageous to promote ozone decomposition into O-2(center dot-) and (OH)-O-center dot radicals. The mechanism of catalytic ozonation in different surface acid sites of iron oxides aqueous suspension was proposed on the basis of all experimental information.

ISSN号：2045-2322

是否译文：否

发表时间：2019-10-14

合写作者：Yan, Liqiang,Bing, Jishuai

通讯作者：吴和成