Light-driven oxygen evolution from water oxidation with immobilised TiO₂ engineered for high performance.

ABSTRACT: Calcination treatments in the range of 500-900 °C of TiO₂ synthesised by the sol-gel resulted in materials with variable physicochemical (i.e., optical, specific surface area, crystallite size and crystalline phase) and morphological properties. The photocatalytic performance of the prepared materials was evaluated in the oxygen evolution reaction (OER) following UV-LED irradiation of aqueous solutions containing iron ions as sacrificial electron acceptors. The highest activity for water oxidation was obtained with the photocatalyst thermally treated at 700 °C (TiO₂-700). Photocatalysts with larger anatase to rutile ratio of the crystalline phases and higher surface density of oxygen vacancies (defects) displayed the best performance in OER. The oxygen defects at the

SUBMITTER: Sampaio MJ 

PROVIDER: S-EPMC8556285 | biostudies-literature | 2021 Oct

REPOSITORIES: biostudies-literature