Enhancing dichromate transport and reduction via electric fields induced by photocatalysis.

ABSTRACT: Mass transport is a fundamental yet often overlooked factor in influencing adsorption and photocatalytic reaction kinetics. This study examines the role of mass transport using the model system of monoclinic bismuth vanadate (BiVO₄) films and potassium dichromate (K₂Cr₂O₇) in a representative photocatalytic reaction. We show that diffusion-driven delivery of K₂Cr₂O₇ to the BiVO₄ surface increases adsorption capacity but decreases the adsorption rate constant. Notably, during the model photocatalytic reduction, long-range electric fields were observed around the illuminated BiVO₄ films, a phenomenon also confirmed in a separate reaction system using TiO₂ as the photocatalyst. These

SUBMITTER: Chen C 

PROVIDER: S-EPMC12018560 | biostudies-literature | 2025 May

REPOSITORIES: biostudies-literature