同质结
材料科学
钛
密度泛函理论
化学物理
半导体
光催化
X射线光电子能谱
纳米技术
化学工程
光电子学
异质结
冶金
计算化学
化学
催化作用
工程类
生物化学
作者
Si‐Ming Wu,Yitian Wang,Shi‐Tian Xiao,Liying Wang,Ge Tian,Jiangbo Chen,Jiawen Liu,Menny Shalom,Xiaoyu Yang
出处
期刊:Nanoscale
[Royal Society of Chemistry]
日期:2022-01-01
卷期号:14 (36): 13373-13377
被引量:16
摘要
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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