Novel (1 × 1)-reconstructions and native defects of TiO2 anatase (101) surface

Novel (1 × 1)-reconstructions and native defects of TiO2 anatase (101) surface
复制标题

新颖的 (1 × 1)-TiO2 锐钛矿 (101) 表面的重建和原生缺陷

DOI:
10.1016/j.apsusc.2017.02.052
复制
发表时间:
2017-05
影响因子:
6.7
通讯作者:
Yuanxu Wang
Yuanxu Wang
中科院分区:
材料科学1区
文献类型:
--
作者:
Qinggao Wang;Fengzhu Ren;Huafeng Dong;Yuanxu Wang

文献摘要

参考文献

相似文献

本文利用最先进的理论方法研究了 TiO2 锐钛矿(101)表面的重构和固有缺陷。我们发现 O 间隙原子是氧化环境中的主要缺陷。这些 O 间隙原子诱导受体能级,对应于间接-直接能带跃迁和带隙变窄。由此可见,富O锐钛矿型TiO2具有较高光催化活性的实验结果是可以理解的。在还原条件下,O空位和Ti间隙的形成变得可行,并且随着还原程度的增加,重构的TiO2锐钛矿(101)-(1 × 1)结构出现。此外,缺陷和重构的TiO2anatse(101)的费米能级可以在很宽的范围内(即几乎整个带隙)调制,这与TiO2金红石(110)的费米能级不同。
In this paper, reconstructions and native defects of TiO2anatase (101) surface are studied using the state-of-the-art theoretical method. We find that O interstitials are dominated defects at an oxidization environment. These O interstitials induce acceptor energy levels, corresponding to an indirect-direct band transition and a bandgap narrowing. And thus, the experimental result that an O-rich anatase TiO2has the higher photocatalytic activity can be understood. The formation of O vacancies and Ti interstitials becomes feasible at a reduced condition, and reconstructed TiO2anatase (101)-(1 × 1) structures present with increasing reduction degree. Furthermore, the Fermi levels of defected and reconstructed TiO2anatse (101) can be modulated in a wide range (i.e., nearly the whole band gap), which are different from those of TiO2rutile (110).
DOI: 10.1103/physrevlett.101.185501
发表时间: 2008-10
影响因子: 8.6
作者:
X. Torrelles;G. Cabailh;R. Lindsay;O. Bikondoa;J. Roy;J. Zegenhagen;G. Teobaldi;W. Hofer;G. Thornton
通讯作者: X. Torrelles;G. Cabailh;R. Lindsay;O. Bikondoa;J. Roy;J. Zegenhagen;G. Teobaldi;W. Hofer;G. Thornton
DOI: 10.1103/physrevb.87.195317
发表时间: 2013-05-28
期刊: PHYSICAL REVIEW B
影响因子: 3.7
作者:
Zhu, Qiang;Li, Li;Allen, Philip B.
通讯作者: Allen, Philip B.
DOI: 10.1103/physrevlett.113.266101
发表时间: 2014-12
影响因子: 8.6
作者:
Qinggao Wang;A. Oganov;Q. Zhu;Xiang‐Feng Zhou
通讯作者: Qinggao Wang;A. Oganov;Q. Zhu;Xiang‐Feng Zhou
DOI: 10.1103/physrevb.46.16067
发表时间: 1992-12-15
期刊: PHYSICAL REVIEW B
影响因子: 3.7
作者:
NEUGEBAUER, J;SCHEFFLER, M
通讯作者: SCHEFFLER, M
DOI: 10.1103/physrevb.79.092101
发表时间: 2009-03-01
期刊: PHYSICAL REVIEW B
影响因子: 3.7
作者:
Cheng, Hongzhi;Selloni, Annabella
通讯作者: Selloni, Annabella