A spatial homojunction of titanium vacancies decorated with oxygen vacancies in TiO2 and its directed charge transfer.
Nanoscale
; 14(36): 13373-13377, 2022 Sep 22.
Article
em En
| MEDLINE
| ID: mdl-36069354
ABSTRACT
The n-p homojunction design in semiconductors could enable directed charge transfer, which is promising but rarely reported. Herein, TiO2 with a spatial n-p homojunction has been designed by decorating TiO2 nanosheets with Ti vacancies around nanostructured TiO2 with O vacancies. 2D 1H TQ-SQ MAS NMR, EPR and XPS show the junction of titanium vacancies and oxygen vacancies at the interface. This spatial homojunction contributes to a significant enhancement in photoelectrochemical and photocatalytic performance, especially photocatalytic seawater splitting. Density functional theory calculations of the charge density reveal the directional n-p charge transfer path at the interface, which is proposed at the atomic-/nanoscale to clarify the generation of rational junctions. The spatial n-p homojunction provides a facile strategy for the design of high-performance semiconductors.
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MEDLINE
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En
Ano de publicação:
2022
Tipo de documento:
Article