Alternative approaches to fabrication of gold-modified TiO2 nanotubes |
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| Affiliation: | 1. Department of Chemistry, Nankai University, Tianjin 300071, PR China;2. Key Laboratory of Colloid and Interface Chemistry, Ministry of Education, Shandong University, Jinan 250100, PR China;1. Department of Chemistry and Technology of Functional Materials, Faculty of Chemistry, Gdańsk University of Technology, Narutowicza 11/12, Gdańsk 80-233, Poland;2. Centre for Plasma and Laser Engineering, Szewalski Institute of Fluid-Flow Machinery, Polish Academy of Science, Fiszera 14, 80-231 Gdańsk, Poland;3. Institute of Mathematics and Physics, UTP University of Science and Technology, Kaliskiego 7, 85-796 Bydgoszcz, Poland;4. Faculty of Applied Physics and Mathematics, Gdańsk University of Technology, Narutowicza 11/12, 80-233 Gdańsk, Poland;1. Department of Alternative Energy Sources, Vocational School, Erzincan University, 24100, Erzincan, Turkey;2. Department of Physics, Art & Science Faculty, Erzincan University, 24100, Erzincan, Turkey;3. Department of Chemistry, Art & Science Faculty, Erzincan University, 24100, Erzincan, Turkey;1. Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland;2. Chair and Department of Biochemistry and Biotechnology, Medical University of Lublin, Chodźki 1, 20-093 Lublin, Poland;3. Interdisciplinary Research Institute, USR CNRS 3078 Parc de la Haute Borne, 50 av. de Halley 59658 Villeneuve d’Ascq, France;4. Faculty of Materials Science and Engineering, Warsaw University of Technology, Wołoska 141, 02-507 Warsaw, Poland;1. College of Materials Science and Engineering, National Key Laboratory of Fundamental Science of Micro/Nano-Devices and System Technology, Chongqing University, Chongqing 400044, PR China;2. Chongqing Normal University, Chongqing 401331, PR China;1. School of Chemical Engineering, Northwest University, Xi''an 710069, PR China;2. School of Physics, Northwest University, Xi''an 710069, PR China |
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| Abstract: | Three approaches, impregnation–reduction, deposition and direct assembly, are used to fabricate gold-modified TiO2 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 TiO2 nanotubes prepared via various procedures exhibit distinct difference in structure. By impregnation–reduction approach, gold-modified TiO2 nanotubes with large gold particles are fabricated. The gold particles are either deposited on or encapsulated in TiO2 nanotubes. However, by using gold hydrophilic colloidal dispersion as gold precursor, gold particles in the modified TiO2 nanotubes are very small. Gold particles only adhere to the outer surface of TiO2 nanotubes after deposition process, whereas adhere to not only the outer but also the inner walls of TiO2 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. |
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