Formation of single-crystalline TiO2 nanomaterials with controlled phase composition and morphology and the application in dye-sensitized solar cell

被引：30

作者：

Xu, Yuanmei ^{[1
]}

Fang, Xiaoming ^{[1
]}

Zhang, Zhengguo ^{[1
]}

机构：

[1] S China Univ Technol, Sch Chem & Chem Engn, Minist Educ, Key Lab Enhanced Heat Transfer & Energy Conservat, Guangzhou 510640, Peoples R China

来源：

APPLIED SURFACE SCIENCE | 2009年 / 255卷 / 21期

基金：

中国国家自然科学基金;

关键词：

TiO2; Nanomaterials; Single-crystalline; Hydrothermal transformation; Dye-sensitized solar cells; HYDROTHERMAL SYNTHESIS; TITANATE NANOTUBES; TITANIUM-DIOXIDE; RUTILE TIO2; ANATASE; WATER; NANOWIRES; NANORODS; ELECTRODE; SURFACES;

D O I：

10.1016/j.apsusc.2009.06.027

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：

Single-crystalline TiO2 nanomaterials with controlled phase composition and morphology were synthesized by hydrothermal transformation of H-titanate nanotubes under different pH. Rutile rectangle nanorods with two four-side tapered tips were produced at pH of 0, whereas anatase nanoparticles with mainly of rhombic shape were obtained at pH from 2 to 7 and their average particle size increased with pH. The transformation mechanisms at different pH were discussed. The single-crystalline anatase nanoparticles obtained at pH of 2 had ca. 12 nm in average particle size, and the powder possessed as large as 112 m(2)/g specific surface areas; the conversion efficiency of the dye-sensitized solar cell based on the nanoparticles was increased by over 40% as compared with that of the cell based on P25. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：8743 / 8749

页数：7

共 40 条

[1] Highly efficient dye-sensitized solar cells with a titania thin-film electrode composed of a network structure of single-crystal-like TiO2 nanowires made by the "oriented attachment" mechanism
Adachi, M
Murata, Y
Takao, J
Jiu, JT
Sakamoto, M
Wang, FM
[J]. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2004, 126 (45) : 14943 - 14949
[2] Protonated titanates and TiO2 nanostructured materials:: Synthesis, properties, and applications
Bavykin, Dmitry V.
Friedrich, Jens M.
Walsh, Frank C.
[J]. ADVANCED MATERIALS, 2006, 18 (21) : 2807 - 2824
[3] The effect of hydrothermal conditions on the mesoporous structure of TiO2 nanotubes
Bavykin, DV
Parmon, VN
Lapkin, AA
Walsh, FC
[J]. JOURNAL OF MATERIALS CHEMISTRY, 2004, 14 (22) : 3370 - 3377
[4] Titanium dioxide nanomaterials: Synthesis, properties, modifications, and applications
Chen, Xiaobo
Mao, Samuel S.
[J]. CHEMICAL REVIEWS, 2007, 107 (07) : 2891 - 2959
[5] Role of the crystallite phase of TiO2 in heterogeneous photocatalysis for phenol oxidation in water
Ding, Z
Lu, GQ
Greenfield, PF
[J]. JOURNAL OF PHYSICAL CHEMISTRY B, 2000, 104 (19) : 4815 - 4820
[6] ELECTROCHEMICAL PHOTOLYSIS OF WATER AT A SEMICONDUCTOR ELECTRODE
FUJISHIMA, A
HONDA, K
[J]. NATURE, 1972, 238 (5358) : 37 - +
[7] Titania polymorphs by soft chemistry: Is there a common structural pattern?
Gateshki, Milen
Yin, Shu
Ren, Yang
Petkov, Valeri
[J]. CHEMISTRY OF MATERIALS, 2007, 19 (10) : 2512 - 2518
[8] Nanocrystalline anatase TiO2 derived from a titanate-directed route for dye-sensitized solar cells
Hsiao, Po-Tsung
Wang, Kai-Ping
Cheng, Chih-Wei
Teng, Hsisheng
[J]. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY, 2007, 188 (01) : 19 - 24
[9] Coordination of Ti4+ Sites in Nanocrystalline TiO2 Films Used for Photoinduced Electron Conduction: Influence of Nanoparticle Synthesis and Thermal Necking
Hsiao, Po-Tsung
Teng, Hsisheng
[J]. JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 2009, 92 (04) : 888 - 893
[10] *INT CTR DIFFR DAT, 2002, 470124 INT CTR DIFFR

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