The preparation of nano-gold catalyst supported on iron doped titanium oxide
| Autor: | Hong Phuoc Nguyen, Thi My Dung Dang, Thi Minh Hanh Nguyen |
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| Rok vydání: | 2010 |
| Předmět: |
Materials science
Sonication Inorganic chemistry Sintering Industrial and Manufacturing Engineering Catalysis Titanium oxide symbols.namesake Chemical engineering Transmission electron microscopy Colloidal gold symbols General Materials Science Thermal stability Electrical and Electronic Engineering Raman spectroscopy |
| Zdroj: | Advances in Natural Sciences: Nanoscience and Nanotechnology. 1:025011 |
| ISSN: | 2043-6262 |
| DOI: | 10.1088/2043-6254/1/2/025011 |
| Popis: | We have prepared iron doped TiO 2 samples by the impregnation of TiO 2 (Degussa—P25) with Fe(III) nitrate as an iron precursor. Obtained materials were then characterized by structural x-ray diffraction (XRD) and optical (Uv-vis, Raman) techniques. Later, we deposited very small gold nanoparticles (AuNPs; nm) onto as-prepared supports by a colloidal deposition method, in which lysine was used as a capping agent and a short sonication time was applied to facilitate the dispersion and deposition of AuNPs. The presence of Fe +3 in the TiO 2 structure was confirmed by an increase in the number of oxygen defect sites that react with O 2 to form reactive oxygen species. Transmission electron microscopy (TEM) was used to determine the size of the gold particles before and after deposition. The AuNPs deposited on the FeTiO2 exhibited good thermal stability against sintering, even at 500 °C for 4 h. |
| Databáze: | OpenAIRE |
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