Facile Vacuum Annealing-Induced Modification of TiO₂ with an Enhanced Photocatalytic Performance.

ABSTRACT: In this work, the photocatalytic performance enhancement of hydrothermally prepared TiO₂ was achieved by facile vacuum annealing treatment. Calcination of TiO₂ powder in air (CA-TiO₂) maintained its white color, while gray powder was obtained when the annealing was performed under vacuum (CV-TiO₂). Fourier transform infrared, total organic carbon, X-ray photoelectron spectroscopy, and electron paramagnetic resonance analyses proved that vacuum annealing transformed ethanol adsorbed on the surface of TiO₂ into carbon-related species accompanied by the formation of surface oxygen vacancies (Vo). The residual carbon-related species on the surface of CV-TiO₂ favored its adsorption of organic dyes. Compared with TiO₂ a

SUBMITTER: Cui Z 

PROVIDER: S-EPMC8529652 | biostudies-literature | 2021 Oct

REPOSITORIES: biostudies-literature