Alternative approaches to fabrication of gold-modified TiO{sub 2} nanotubes
- Department of Chemistry, Nankai University, Tianjin 300071 (China)
- Key Laboratory of Colloid and Interface Chemistry, Ministry of Education, Shandong University, Jinan 250100 (China)
Three approaches, impregnation-reduction, deposition and direct assembly, are used to fabricate gold-modified TiO{sub 2} nanotubes. Prepared materials are characterized with powder X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM), UV-visible absorption spectroscopy and BET, etc. The gold-modified TiO{sub 2} nanotubes prepared via various procedures exhibit distinct difference in structure. By impregnation-reduction approach, gold-modified TiO{sub 2} nanotubes with large gold particles are fabricated. The gold particles are either deposited on or encapsulated in TiO{sub 2} nanotubes. However, by using gold hydrophilic colloidal dispersion as gold precursor, gold particles in the modified TiO{sub 2} nanotubes are very small. Gold particles only adhere to the outer surface of TiO{sub 2} nanotubes after deposition process, whereas adhere to not only the outer but also the inner walls of TiO{sub 2} nanotubes after direct assembly process. A possible mechanism is proposed to illustrate the formation of gold-modified nanotubes that are prepared by direct assembly process.
- OSTI ID:
- 20895225
- Journal Information:
- Materials Research Bulletin, Vol. 41, Issue 6; Other Information: DOI: 10.1016/j.materresbull.2005.11.008; PII: S0025-5408(05)00417-4; Copyright (c) 2005 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); ISSN 0025-5408
- Country of Publication:
- United States
- Language:
- English
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