Codoping titanium dioxide nanowires with tungsten and carbon for enhanced photoelectrochemical performance

被引：267

作者：

Cho, In Sun ^{[1
]}

Lee, Chi Hwan ^{[1
]}

Feng, Yunzhe ^{[2
]}

Logar, Manca ^{[2
]}

Rao, Pratap M. ^{[1
]}

Cai, Lili ^{[1
]}

Kim, Dong Rip ^{[3
]}

Sinclair, Robert ^{[2
]}

Zheng, Xiaolin ^{[1
]}

机构：

[1] Stanford Univ, Dept Mech Engn, Stanford, CA 94305 USA

[2] Stanford Univ, Dept Mat Sci & Engn, Stanford, CA 94305 USA

[3] Hanyang Univ, Dept Mech Engn, Seoul 133791, South Korea

来源：

NATURE COMMUNICATIONS | 2013年 / 4卷

基金：

新加坡国家研究基金会;

关键词：

DOPED TIO2; WATER; HYDROGEN; PHOTOCATALYSIS; DEGRADATION; EFFICIENT; NANORODS;

D O I：

10.1038/ncomms2729

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Recent density-functional theory calculations suggest that codoping TiO2 with donor-acceptor pairs is more effective than monodoping for improving photoelectrochemical water-splitting performance because codoping can reduce charge recombination, improve material quality, enhance light absorption and increase solubility limits of dopants. Here we report a novel ex-situ method to codope TiO2 with tungsten and carbon (W, C) by sequentially annealing W-precursor-coated TiO2 nanowires in flame and carbon monoxide gas. The unique advantages of flame annealing are that the high temperature (>1,000 degrees C) and fast heating rate of flame enable rapid diffusion of W into TiO2 without damaging the nanowire morphology and crystallinity. This is the first experimental demonstration that codoped TiO2:(W, C) nanowires outperform monodoped TiO2:W and TiO2:C and double the saturation photocurrent of undoped TiO2 for photoelectrochemical water splitting. Such significant performance enhancement originates from a greatly improved electrical conductivity and activity for oxygen-evolution reaction due to the synergistic effects of codoping.

引用

页数：8

共 46 条

[1] Enhanced photoelectrochemical responses of ZnO films through Ga and N codoping [J].

Ahn, Kwang-Soon ;

Yan, Yanfa ;

Shet, Sudhakar ;

Deutsch, Todd ;

Turner, John ;

Al-Jassim, Mowafak .

APPLIED PHYSICS LETTERS, 2007, 91 (23)

[2]

[Anonymous], NANO LETT

[3] Visible-light photocatalysis in nitrogen-doped titanium oxides [J].

Asahi, R ;

Morikawa, T ;

Ohwaki, T ;

Aoki, K ;

Taga, Y .

SCIENCE, 2001, 293 (5528) :269-271

[4] Photo-electrochemical hydrogen generation from water using solar energy. Materials-related aspects [J].

Bak, T ;

Nowotny, J ;

Rekas, M ;

Sorrell, CC .

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, 2002, 27 (10) :991-1022

[5] A Novel Codoping Approach for Enhancing the Performance of LiFePO4 Cathodes [J].

Ban, Chunmei ;

Yin, Wan-Jian ;

Tang, Houwen ;

Wei, Su-Huai ;

Yan, Yanfa ;

Dillon, Anne C. .

ADVANCED ENERGY MATERIALS, 2012, 2 (08) :1028-1032

[6] Lowering the Band Gap of Anatase-Structured TiO2 by Coalloying with Nb and N: Electronic Structure and Photocatalytic Degradation of Methylene Blue Dye [J].

Breault, Tanya M. ;

Bartlett, Bart M. .

JOURNAL OF PHYSICAL CHEMISTRY C, 2012, 116 (10) :5986-5994

[7] Transport properties in single-crystalline rutile TiO2 nanorods [J].

Chen, R. S. ;

Chen, C. A. ;

Wang, W. C. ;

Tsai, H. Y. ;

Huang, Y. S. .

APPLIED PHYSICS LETTERS, 2011, 99 (22)

[8] Titanium dioxide nanomaterials: Synthesis, properties, modifications, and applications [J].

Chen, Xiaobo ;

Mao, Samuel S. .

CHEMICAL REVIEWS, 2007, 107 (07) :2891-2959

[9] Accelerating materials development for photoelectrochemical hydrogen production: Standards for methods, definitions, and reporting protocols [J].

Chen, Zhebo ;

Jaramillo, Thomas F. ;

Deutsch, Todd G. ;

Kleiman-Shwarsctein, Alan ;

Forman, Arnold J. ;

Gaillard, Nicolas ;

Garland, Roxanne ;

Takanabe, Kazuhiro ;

Heske, Clemens ;

Sunkara, Mahendra ;

McFarland, Eric W. ;

Domen, Kazunari ;

Miller, Eric L. ;

Turner, John A. ;

Dinh, Huyen N. .

JOURNAL OF MATERIALS RESEARCH, 2010, 25 (01) :3-16

[10] Branched TiO2 Nanorods for Photoelectrochemical Hydrogen Production [J].

Cho, In Sun ;

Chen, Zhebo ;

Forman, Arnold J. ;

Kim, Dong Rip ;

Rao, Pratap M. ;

Jaramillo, Thomas F. ;

Zheng, Xiaolin .

NANO LETTERS, 2011, 11 (11) :4978-4984

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