Abstract
Grey Fe doped CeO2-σ with tunable surface and bulk oxygen vacancies (OVs) were facilely prepared by a hydrothermal method. The light absorption, charge transfer efficiency, and catalytic activity and mechanism closely depended on the OVs. By tailoring the surface and bulk OVs, the catalytic activity of grey ceria was boosted due to the enhanced production of reactive oxygen species (i.e. OH, surface O). Density functional theory calculations show that the OVs, especially the bulk OVs, modulate the electronic structure for narrowing the bandgap and accelerating the charge transfer. Meanwhile, the surface OVs more promote the adsorption of ozone and the bulk OVs more induces the dissociation of ozone into reactive surface O. The calculation results agree well with the experimental observations. This study provides a simple method for engineering the surface and bulk OVs of ceria and gains insight into their roles in photocatalytic ozonation.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
