Photocatalysis of Adsorbed Catechol on Degussa P25 TiO₂ at the Air-Solid Interface.

ABSTRACT: Semiconductor photocatalysis with commercial TiO₂ (Degussa P25) has shown significant potential in water treatment of organic pollutants. However, the photoinduced reactions of adsorbed catechol, a phenolic air pollutant from biomass burning and combustion emissions, at the air-solid interface of TiO₂ remain unexplored. Herein we examine the photocatalytic decay of catechol in the presence of water vapor, which acts as an electron acceptor. Experiments under variable cut-off wavelengths of irradiation (λ_cut-off ≥ 320, 400, and 515 nm) distinguish the mechanistic contribution of a ligand-to-metal charge-transfer (LMCT) complex of surface chemisorbed catechol on TiO₂. The LMCT complex injects electrons into the conduction band of TiO₂ fr

SUBMITTER: Hoque MA 

PROVIDER: S-EPMC11493058 | biostudies-literature | 2024 Oct

REPOSITORIES: biostudies-literature