Details

Autor(en) / Beteiligte

• Wu, Si-Ming
• Wang, Yi-Tian
• Xiao, Shi-Tian
• Wang, Li-Ying
• Tian, Ge
• Chen, Jiang-Bo
• Liu, Jia-Wen
• Shalom, Menny
• Yang, Xiao-Yu

Titel

A spatial homojunction of titanium vacancies decorated with oxygen vacancies in TiO and its directed charge transfer

Ist Teil von

• Nanoscale, 2022-09, Vol.14 (36), p.13373-13377

Erscheinungsjahr

2022

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• The n-p homojunction design in semiconductors could enable directed charge transfer, which is promising but rarely reported. Herein, TiO 2 with a spatial n-p homojunction has been designed by decorating TiO 2 nanosheets with Ti vacancies around nanostructured TiO 2 with O vacancies. 2D 1 H 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. The spatial n-p homojunction design in TiO 2 greatly enhances its photocatalytic H 2 production performance owing to the directed charge transfer.