Synthesis of Hollow Silver Spheres using Spherical Vaterite-type Calcium Carbonate as Template
| Autor: | Minyoung Park, Hani Go, Seog Woo Rhee, Jae-Hyun Kim |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Thermogravimetric analysis
Materials science Aqueous solution Inorganic chemistry 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology Ascorbic acid 01 natural sciences Polyelectrolyte 0104 chemical sciences chemistry.chemical_compound Calcium carbonate chemistry Vaterite Carbonate Ion Fourier transform infrared spectroscopy 0210 nano-technology |
| Zdroj: | Bulletin of the Korean Chemical Society. 37:269-275 |
| ISSN: | 1229-5949 |
| DOI: | 10.1002/bkcs.10664 |
| Popis: | In this work, we describe the synthesis of hollow silver spheres using vaterite-type CaCO3 as template. The spherical vaterite-type CaCO3 was selectively precipitated during the reaction of aqueous CaCl2 and Na2CO3 in the presence of the polyelectrolyte poly(4-styrenesulfonate). Aqueous AgNO3 solution containing NH2 -functionalized CaCO3 particles was treated with reducing agents such as ascorbic acid, NaBH4 , and acetaldehyde, and the reduced silver particles were deposited on the surface of CaCO3 particles to form uniform silver shells. The CaCO3 used as template was removed from the CaCO3/Ag composite by treatment with acid. Finally, the hollow silver sphere was obtained. The morphologies of product were investigated using electron microscopy, the chemical composition of the composite was analyzed using energy-dispersive X-ray spectroscopy, the vibration modes of the carbonate ion were investigated by Fourier transform infrared spectroscopy, the thermal mass change was measured using the thermogravimetric analysis, and the solid phases were confirmed by powder X-ray diffraction. |
| Databáze: | OpenAIRE |
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