Nanonecklaces of Platinum and Gold with High Aspect Ratios Synthesized in Mesoporous Organosilica Templates by Wet Hydrogen Reduction
| العنوان: | Nanonecklaces of Platinum and Gold with High Aspect Ratios Synthesized in Mesoporous Organosilica Templates by Wet Hydrogen Reduction |
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| المؤلفون: | Jun-Ichi Kimura, Shinji Inagaki, Toshiyuki Ohtake, Masaru Ichikawa, Atsushi Fukuoka, Yuzuru Sakamoto, Takanori Higuchi, Tadashi Oshio, Noriyuki Shimomura |
| المصدر: | Chemistry of Materials. 18:337-343 |
| بيانات النشر: | American Chemical Society (ACS), 2005. |
| سنة النشر: | 2005 |
| مصطلحات موضوعية: | Materials science, General Chemical Engineering, Nanowire, chemistry.chemical_element, Nanotechnology, General Chemistry, X-ray absorption fine structure, Metal, Mesoporous organosilica, Adsorption, chemistry, Chemical engineering, visual_art, Materials Chemistry, visual_art.visual_art_medium, Nanorod, Nanometre, Platinum |
| الوصف: | Nanowires of platinum and gold with high aspect ratios are synthesized in one-dimensional channels of ordered mesoporous organosilica HMM. Water-saturated hydrogen reduction (wet H2-reduction) is significantly effective for large-scale synthesis of long nanowires, while dry H2-reduction gives monodispersed metal nanoparticles. The nanowires are characterized by TEM, XRD, UV−vis, STM, and XAFS. The Pt and Au wires are 3 nm in diameter and several hundred nanometers to micrometers in length. The metal wires extracted from HMM with HF have a nanonecklace structure, while the wires from siliceous FSM-16 have a nanorod structure. The results indicate that the hydrophobicity or hydrophilicity of the internal pore gives a significant influence on the morphology of nanowires. The nanonecklace structure is also affected by the organic groups in HMM. The mechanism for formation of Pt nanowires in wet H2-reduction was studied. In the impregnation process, the [PtCl6]2- ion is physically adsorbed on HMM, and the Pt(I... |
| تدمد: | 1520-5002 0897-4756 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::e99c36b233fdb200d5a0ed7f7309f16f https://doi.org/10.1021/cm0516964 |
| رقم الأكسشن: | edsair.doi...........e99c36b233fdb200d5a0ed7f7309f16f |
| قاعدة البيانات: | OpenAIRE |
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