Self-wetting triphase photocatalysis for effective and selective removal of hydrophilic volatile organic compounds in air.

ABSTRACT: Photocatalytic air purification is widely regarded as a promising technology, but it calls for more efficient photocatalytic materials and systems. Here we report a strategy to introduce an in-situ water (self-wetting) layer on WO₃ by coating hygroscopic periodic acid (PA) to dramatically enhance the photocatalytic removal of hydrophilic volatile organic compounds (VOCs) in air. In ambient air, water vapor is condensed on WO₃ to make a unique tri-phasic (air/water/WO₃) system. The in-situ formed water layer selectively concentrates hydrophilic VOCs. PA plays the multiple roles as a water-layer inducer, a surface-complexing ligand enhancing visible light absorption, and a strong electron acceptor. Under visible light, the photogenerated electrons are rapidly

SUBMITTER: He F 

PROVIDER: S-EPMC8556241 | biostudies-literature | 2021 Oct

REPOSITORIES: biostudies-literature