Surface reconstruction, oxygen vacancy distribution and photocatalytic activity of hydrogenated titanium oxide thin film

被引：57

作者：

Gurylev, Vitaly ^{[1
]}

Su, Chung-Yi ^{[1
]}

Perng, Tsong-Pyng ^{[1
]}

机构：

[1] Natl Tsing Hua Univ, Dept Mat Sci & Engn, Hsinchu 300, Taiwan

来源：

JOURNAL OF CATALYSIS | 2015年 / 330卷

关键词：

TiO2; Anatase; Oxygen vacancy; Hydrogenation; Surface morphology; Photocatalyst; SCANNING-TUNNELING-MICROSCOPY; TIO2 NANOTUBE ARRAYS; DOPED TIO2; BLACK TIO2; LUMINESCENCE PROPERTY; PHASE-TRANSFORMATION; ORGANIC-COMPOUNDS; RAMAN MODE; ANATASE; WATER;

D O I：

10.1016/j.jcat.2015.07.016

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

TiO2 thin film prepared by atomic layer deposition was subjected to annealing in hydrogen at temperatures 350-500 degrees C. Hydrogenation induced the formation of disordered states and oxygen vacancies that resulted in increased surface roughness. Furthermore, it was discovered that oxygen vacancies were mostly formed on the surface, and their concentration and distribution uniformity increased with increasing temperature. The most uniform distribution of oxygen vacancies with the highest surface density was obtained after annealing at 500 degrees C, which is consistent with the lowest electron-hole recombination rate and highest photoactivity of the modified TiO2. (C) 2015 Elsevier Inc. All rights reserved.

引用

收藏

页码：177 / 186

页数：10

相关论文

共 73 条

[1] DFT Study on Ce-Doped Anatase TiO2: Nature of Ce3+ and Ti3+ Centers Triggered by Oxygen Vacancy Formation [J].

Albuquerque, Anderson R. ;

Bruix, Albert ;

dos Santos, Ieda M. G. ;

Sambrano, Julio R. ;

Illas, Francesc .

JOURNAL OF PHYSICAL CHEMISTRY C, 2014, 118 (18) :9677-9689

[2] Effects of metal nanoparticles deposition on the photocatalytic oxidation of ammonia in TiO2 aqueous suspensions [J].

Altomare, Marco ;

Selli, Elena .

CATALYSIS TODAY, 2013, 209 :127-133

[3] Atomic resolution noncontact atomic force and scanning tunneling microscopy of TiO2(110)-(1x1) and -(1x2):: Simultaneous imaging of surface structures and electronic states [J].

Ashino, M ;

Sugawara, Y ;

Morita, S ;

Ishikawa, M .

PHYSICAL REVIEW LETTERS, 2001, 86 (19) :4334-4337

[4] Fabrication of Ag-loaded multi-walled TiO2 nanotube arrays and their photocatalytic activity [J].

Chang, Wen-Ting ;

Hsueh, Yang-Chih ;

Huang, Sheng-Hsin ;

Liu, Kuang-I ;

Kei, Chi-Chung ;

Perng, Tsong-Pyng .

JOURNAL OF MATERIALS CHEMISTRY A, 2013, 1 (06) :1987-1991

[5] Titanium Dioxide Photocatalysis in Atmospheric Chemistry [J].

Chen, Haihan ;

Nanayakkara, Charith E. ;

Grassian, Vicki H. .

CHEMICAL REVIEWS, 2012, 112 (11) :5919-5948

[6] Toward highly efficient photocatalysis: a flow-through Pt@TiO2@AAO membrane nanoreactor prepared by atomic layer deposition [J].

Chen, Hsueh-Shih ;

Chen, Po-Hsun ;

Huang, Sheng-Hsin ;

Perng, Tsong-Pyng .

CHEMICAL COMMUNICATIONS, 2014, 50 (33) :4379-4382

[7] Increasing Solar Absorption for Photocatalysis with Black Hydrogenated Titanium Dioxide Nanocrystals [J].

Chen, Xiaobo ;

Liu, Lei ;

Yu, Peter Y. ;

Mao, Samuel S. .

SCIENCE, 2011, 331 (6018) :746-750

[8] Shallow and deep trap emission and luminescence quenching of TiO2 nanoparticles on Cu doping [J].

Choudhury, Biswajit ;

Dey, Munmun ;

Choudhury, Amarjyoti .

APPLIED NANOSCIENCE, 2014, 4 (04) :499-506

[9] Oxygen defect dependent variation of band gap, Urbach energy and luminescence property of anatase, anatase-rutile mixed phase and of rutile phases of TiO2 nanoparticles [J].

Choudhury, Biswajit ;

Choudhury, Amarjyoti .

PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES, 2014, 56 :364-371

[10] Room temperature ferromagnetism in defective TiO2 nanoparticles: Role of surface and grain boundary oxygen vacancies [J].

Choudhury, Biswajit ;

Choudhury, Amarjyoti .

JOURNAL OF APPLIED PHYSICS, 2013, 114 (20)

← 1 2 3 4 5 6 7 8 →