Preparation and characterization of nanosized Pt/Au particles on TiO2-nanotubes

被引:50
作者
Chien, SH
Liou, YC
Kuo, MC
机构
[1] Acad Sinica, Inst Chem, Taipei 11529, Taiwan
[2] Natl Taiwan Univ, Dept Chem, Taipei 10764, Taiwan
关键词
TiO2-nanotubes; Pt; Au nanocatalysts; in-situ IR; CO2; hydrogenation; CO oxidation; TITANIA; WATER;
D O I
10.1016/j.synthmet.2005.07.254
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
TiO2-nanotubes were prepared by hydrothermal treatment of TiO2 powders in concentrated NaOH solution at 110 degrees C for 90 hours. The immobilization of Pt and Au was carried out by photochemical deposition method with TiO2-nanotubes suspending in an aqueous solution containing H2PtCl6 center dot 6H(2)O or HAuCl4-3H(2)O. Transmission electron micrographs revealed that the diameter of the as-made TiO2-nanotube is about 10 nm with an inner diameter around 6 run. The nanotube shows layered structures similar to the carbon nanotubes. The layer spacing is about 0.88 nm. Nanosized Pt (similar to 2 nm) and Au (similar to 10 nm) particles were dispersed uniformly on the surface of the nanotubes. The BET surface area of the nanotube is similar to 200 m(2)/g as estimated by N-2 adsorption isotherm, that was not significantly affected after the immobilization of Pt or Au. In-situ IR spectroscopic studies revealed that the Pt/TiO2-nanotube is highly active for CO2 hydrogenation, while Au/TiO2-nanotube exhibits pronounced activity for CO oxidation at room temperature. In general, Pt/TiO2-nanotubes presents a relatively higher activity than Au/TiO2-nanotubes, and the catalytic activities of TiO2 supported Pt and Au catalysts are significantly enhanced by the high surface area of TiO2-nanotube.
引用
收藏
页码:333 / 336
页数:4
相关论文
共 16 条
  • [1] Formation of titania nanotubes with high photo-catalytic activity
    Adachi, M
    Murata, Y
    Harada, M
    Yoshikawa, S
    [J]. CHEMISTRY LETTERS, 2000, (08) : 942 - 943
  • [2] PHOTOASSISTED HYDROGEN-PRODUCTION FROM A WATER-ETHANOL SOLUTION - A COMPARISON OF ACTIVITIES OF AU-TIO2 AND PT-TIO2
    BAMWENDA, GR
    TSUBOTA, S
    NAKAMURA, T
    HARUTA, M
    [J]. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY, 1995, 89 (02) : 177 - 189
  • [3] Spectroscopic studies of NO reduction on Pt/TiO2 catalysts
    Chien, SH
    Kuo, MC
    Lu, CH
    Lu, KN
    [J]. CATALYSIS TODAY, 2004, 97 (2-3) : 121 - 127
  • [4] CHIEN SH, 1993, B I CHEM ACAD SIN, V40, P37
  • [5] ELECTROCHEMICAL PHOTOLYSIS OF WATER AT A SEMICONDUCTOR ELECTRODE
    FUJISHIMA, A
    HONDA, K
    [J]. NATURE, 1972, 238 (5358) : 37 - +
  • [6] ELECTRONIC EFFECTS IN STRONG METAL SUPPORT INTERACTIONS ON TITANIA DEPOSITED METAL-CATALYSTS
    HERRMANN, JM
    [J]. JOURNAL OF CATALYSIS, 1984, 89 (02) : 404 - 412
  • [7] Formation of a titanium dioxide nanotube array
    Hoyer, P
    [J]. LANGMUIR, 1996, 12 (06) : 1411 - 1413
  • [8] Electronic structure of single-walled TiO2 and VO2 nanotubes
    Ivanovskaya, VV
    Enyashin, AN
    Ivanovskii, AL
    [J]. MENDELEEV COMMUNICATIONS, 2003, (01) : 5 - 7
  • [9] Formation of titanium oxide nanotube
    Kasuga, T
    Hiramatsu, M
    Hoson, A
    Sekino, T
    Niihara, K
    [J]. LANGMUIR, 1998, 14 (12) : 3160 - 3163
  • [10] PHOTOCATALYSIS ON TIO2 SURFACES - PRINCIPLES, MECHANISMS, AND SELECTED RESULTS
    LINSEBIGLER, AL
    LU, GQ
    YATES, JT
    [J]. CHEMICAL REVIEWS, 1995, 95 (03) : 735 - 758