Homojunction of Oxygen and Titanium Vacancies and its Interfacial n–p Effect

Si Ming Wu, Xiao Long Liu, Xi Liang Lian, Ge Tian, Christoph Janiak, Yue Xing Zhang, Yi Lu, Hao Zheng Yu, Jie Hu, Hao Wei, Heng Zhao, Gang Gang Chang, Gustaaf Van Tendeloo, Li Ying Wang, Xiao Yu Yang, Bao Lian Su

Résultats de recherche: Contribution à un journal/une revueArticle

Résumé

The homojunction of oxygen/metal vacancies and its interfacial n–p effect on the physiochemical properties are rarely reported. Interfacial n–p homojunctions of TiO2 are fabricated by directly decorating interfacial p-type titanium-defected TiO2 around n-type oxygen-defected TiO2 nanocrystals in amorphous–anatase homogeneous nanostructures. Experimental measurements and theoretical calculations on the cell lattice parameters show that the homojunction of oxygen and titanium vacancies changes the charge density of TiO2; a strong EPR signal caused by oxygen vacancies and an unreported strong titanium vacancies signal of 2D 1H TQ-SQ MAS NMR are present. Amorphous–anatase TiO2 shows significant performance regarding the photogeneration current, photocatalysis, and energy storage, owing to interfacial n-type to p-type conductivity with high charge mobility and less structural confinement of amorphous clusters. A new “homojunction of oxygen and titanium vacancies” concept, characteristics, and mechanism are proposed at an atomic-/nanoscale to clarify the generation of oxygen vacancies and titanium vacancies as well as the interface electron transfer.

langue originaleAnglais
Numéro d'article1802173
journalAdvanced materials
Volume30
Numéro de publication32
Les DOIs
étatPublié - 9 août 2018

Empreinte digitale

Titanium
Vacancies
Oxygen
Oxygen vacancies
Photocatalysis
Charge density
Nanocrystals
Energy storage
Lattice constants
Paramagnetic resonance
Nanostructures
Metals
Nuclear magnetic resonance
Electrons

Citer ceci

Wu, Si Ming ; Liu, Xiao Long ; Lian, Xi Liang ; Tian, Ge ; Janiak, Christoph ; Zhang, Yue Xing ; Lu, Yi ; Yu, Hao Zheng ; Hu, Jie ; Wei, Hao ; Zhao, Heng ; Chang, Gang Gang ; Van Tendeloo, Gustaaf ; Wang, Li Ying ; Yang, Xiao Yu ; Su, Bao Lian. / Homojunction of Oxygen and Titanium Vacancies and its Interfacial n–p Effect. Dans: Advanced materials. 2018 ; Vol 30, Numéro 32.
@article{9205ae94a06c45289f515415485be82c,
title = "Homojunction of Oxygen and Titanium Vacancies and its Interfacial n–p Effect",
abstract = "The homojunction of oxygen/metal vacancies and its interfacial n–p effect on the physiochemical properties are rarely reported. Interfacial n–p homojunctions of TiO2 are fabricated by directly decorating interfacial p-type titanium-defected TiO2 around n-type oxygen-defected TiO2 nanocrystals in amorphous–anatase homogeneous nanostructures. Experimental measurements and theoretical calculations on the cell lattice parameters show that the homojunction of oxygen and titanium vacancies changes the charge density of TiO2; a strong EPR signal caused by oxygen vacancies and an unreported strong titanium vacancies signal of 2D 1H TQ-SQ MAS NMR are present. Amorphous–anatase TiO2 shows significant performance regarding the photogeneration current, photocatalysis, and energy storage, owing to interfacial n-type to p-type conductivity with high charge mobility and less structural confinement of amorphous clusters. A new “homojunction of oxygen and titanium vacancies” concept, characteristics, and mechanism are proposed at an atomic-/nanoscale to clarify the generation of oxygen vacancies and titanium vacancies as well as the interface electron transfer.",
keywords = "energy storage, homojunction of oxygen and titanium vacancy, n–p effect, photocatalysis, titanium dioxide",
author = "Wu, {Si Ming} and Liu, {Xiao Long} and Lian, {Xi Liang} and Ge Tian and Christoph Janiak and Zhang, {Yue Xing} and Yi Lu and Yu, {Hao Zheng} and Jie Hu and Hao Wei and Heng Zhao and Chang, {Gang Gang} and {Van Tendeloo}, Gustaaf and Wang, {Li Ying} and Yang, {Xiao Yu} and Su, {Bao Lian}",
year = "2018",
month = "8",
day = "9",
doi = "10.1002/adma.201802173",
language = "English",
volume = "30",
journal = "Advanced materials",
issn = "0935-9648",
publisher = "Wiley-VCH Verlag",
number = "32",

}

Wu, SM, Liu, XL, Lian, XL, Tian, G, Janiak, C, Zhang, YX, Lu, Y, Yu, HZ, Hu, J, Wei, H, Zhao, H, Chang, GG, Van Tendeloo, G, Wang, LY, Yang, XY & Su, BL 2018, 'Homojunction of Oxygen and Titanium Vacancies and its Interfacial n–p Effect', Advanced materials, VOL. 30, Numéro 32, 1802173. https://doi.org/10.1002/adma.201802173

Homojunction of Oxygen and Titanium Vacancies and its Interfacial n–p Effect. / Wu, Si Ming; Liu, Xiao Long; Lian, Xi Liang; Tian, Ge; Janiak, Christoph; Zhang, Yue Xing; Lu, Yi; Yu, Hao Zheng; Hu, Jie; Wei, Hao; Zhao, Heng; Chang, Gang Gang; Van Tendeloo, Gustaaf; Wang, Li Ying; Yang, Xiao Yu; Su, Bao Lian.

Dans: Advanced materials, Vol 30, Numéro 32, 1802173, 09.08.2018.

Résultats de recherche: Contribution à un journal/une revueArticle

TY - JOUR

T1 - Homojunction of Oxygen and Titanium Vacancies and its Interfacial n–p Effect

AU - Wu, Si Ming

AU - Liu, Xiao Long

AU - Lian, Xi Liang

AU - Tian, Ge

AU - Janiak, Christoph

AU - Zhang, Yue Xing

AU - Lu, Yi

AU - Yu, Hao Zheng

AU - Hu, Jie

AU - Wei, Hao

AU - Zhao, Heng

AU - Chang, Gang Gang

AU - Van Tendeloo, Gustaaf

AU - Wang, Li Ying

AU - Yang, Xiao Yu

AU - Su, Bao Lian

PY - 2018/8/9

Y1 - 2018/8/9

N2 - The homojunction of oxygen/metal vacancies and its interfacial n–p effect on the physiochemical properties are rarely reported. Interfacial n–p homojunctions of TiO2 are fabricated by directly decorating interfacial p-type titanium-defected TiO2 around n-type oxygen-defected TiO2 nanocrystals in amorphous–anatase homogeneous nanostructures. Experimental measurements and theoretical calculations on the cell lattice parameters show that the homojunction of oxygen and titanium vacancies changes the charge density of TiO2; a strong EPR signal caused by oxygen vacancies and an unreported strong titanium vacancies signal of 2D 1H TQ-SQ MAS NMR are present. Amorphous–anatase TiO2 shows significant performance regarding the photogeneration current, photocatalysis, and energy storage, owing to interfacial n-type to p-type conductivity with high charge mobility and less structural confinement of amorphous clusters. A new “homojunction of oxygen and titanium vacancies” concept, characteristics, and mechanism are proposed at an atomic-/nanoscale to clarify the generation of oxygen vacancies and titanium vacancies as well as the interface electron transfer.

AB - The homojunction of oxygen/metal vacancies and its interfacial n–p effect on the physiochemical properties are rarely reported. Interfacial n–p homojunctions of TiO2 are fabricated by directly decorating interfacial p-type titanium-defected TiO2 around n-type oxygen-defected TiO2 nanocrystals in amorphous–anatase homogeneous nanostructures. Experimental measurements and theoretical calculations on the cell lattice parameters show that the homojunction of oxygen and titanium vacancies changes the charge density of TiO2; a strong EPR signal caused by oxygen vacancies and an unreported strong titanium vacancies signal of 2D 1H TQ-SQ MAS NMR are present. Amorphous–anatase TiO2 shows significant performance regarding the photogeneration current, photocatalysis, and energy storage, owing to interfacial n-type to p-type conductivity with high charge mobility and less structural confinement of amorphous clusters. A new “homojunction of oxygen and titanium vacancies” concept, characteristics, and mechanism are proposed at an atomic-/nanoscale to clarify the generation of oxygen vacancies and titanium vacancies as well as the interface electron transfer.

KW - energy storage

KW - homojunction of oxygen and titanium vacancy

KW - n–p effect

KW - photocatalysis

KW - titanium dioxide

UR - http://www.scopus.com/inward/record.url?scp=85051119321&partnerID=8YFLogxK

U2 - 10.1002/adma.201802173

DO - 10.1002/adma.201802173

M3 - Article

AN - SCOPUS:85051119321

VL - 30

JO - Advanced materials

JF - Advanced materials

SN - 0935-9648

IS - 32

M1 - 1802173

ER -