Abstract
Effective photocatalytic polyethylene degradation by TiO2 is hindered by the sluggish kinetics of alkyl hydroperoxide decomposition. Introduction of oxygen vacancies onto TiO2 destabilizes the hydroperoxide O-O bond due to mid-gap states and the elevated Fermi level. Downshift of the d-band center by oxygen vacancies also enhanced adsorbate-surface interactions and lowered the activation energy barrier from Gibbs calculations. Experimental evidence additionally substantiated enhanced polyethylene degradation on TiO2-x compared to TiO2.
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