期刊
NANOSCALE
卷 14, 期 36, 页码 13373-13377出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d2nr03877c
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资金
- National Natural Science Foundation of China [51861135313]
- Sino-German Center COVID-19 Related Bilateral Collaborative Project [C-0046]
- Shenzhen Science and Technology Program [JCYJ20210324142010029, GJHZ20210705143204014]
- Guangdong Basic and Applied Basic Research Foundation [2022A1515010137, 2022A1515010504]
- Guangdong Province International Scientific and Technological Cooperation Projects [2020A0505100036]
- National 111 project [B20002]
- PCSIRT [IRT_15R52]
The design of n-p homojunctions in semiconductors enables directed charge transfer and leads to significant enhancement in photoelectrochemical and photocatalytic performance. A spatial n-p homojunction in TiO2 has been achieved by decorating TiO2 nanosheets with Ti vacancies, providing a facile strategy for the design of high-performance semiconductors.
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 H-1 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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