Photocatalytic reduction of Cr(VI) by WO₃@PVP with elevated conduction band level and improved charge carrier separation property.

ABSTRACT: Photocatalytic reduction of heavy metal ions is a green and promising technology which requires electrons with enough negative energy levels as well as efficient separation property from photo-generated holes of photocatalysts. For WO₃, the low conduction band edge and the severe photo-generated charge carrier recombination limited its application in photocatalytic reduction of pollutants. In this work, we prepared WO₃@PVP with PVP capped WO₃ by a simple one-step hydrothermal method, which showed an elevated energy band structure and improved charge carrier separation property. XRD, SEM, TEM, XPS, DRS, and the photocurrent density test were carried out to study the properties of the composite. Results demonstrated monoclinic WO₃ with a size of ∼1

SUBMITTER: Li H 

PROVIDER: S-EPMC9488075 | biostudies-literature | 2020 Jul

REPOSITORIES: biostudies-literature