Magnéli phases Ti O2−1 as novel ozonation catalysts for effective mineralization of phenol

摘要: Abstract Magneli phases TinO2n−1 have been demonstrated as promising environmentally friendly materials in advanced oxidation processes. In this study, used catalysts for the ozonation of phenol aqueous solution first time. The exhibited excellent catalytic activities both degradation and mineralization. When Ti4O7 was added, reaction rate six-fold higher than that with ozone alone, while total organic carbon removal substantially elevated from around 19.2% to 92%. By virtue good chemical stability materials, a low metal leaching less 0.15 mg·L− 1 could effectively avoid secondary pollution by ions. Radical quenching tests revealed O2− 1O2 be active oxygen species at pH 5. As semiconductor catalysts, show electronic transfer capability. Ozone adsorbed B-acid sites catalyst surface can capture an electron conversion Ti(III) Ti(IV), is thereby broken into species. It interesting observe exhibit better activity mineralization lower n value. difference electrical conductivity considered major factor performances. More highly conductive faster electron-transfer activity. Thus, significant evidences obtained single-electron-transfer mechanism TinO2n−1.