An X-ray photoelectron spectroscopic (XPS) study of cobalt adsorbed on the clay mineral chlorite
| Autor: | John G. Dillard, Mitchell H. Koppelman |
|---|---|
| Rok vydání: | 1978 |
| Předmět: |
Chemistry
Inorganic chemistry Binding energy X-ray chemistry.chemical_element Surfaces Coatings and Films Electronic Optical and Magnetic Materials Biomaterials chemistry.chemical_compound Colloid and Surface Chemistry Adsorption X-ray photoelectron spectroscopy Qualitative inorganic analysis Clay minerals Cobalt Chlorite |
| Zdroj: | Journal of Colloid and Interface Science. 66:345-351 |
| ISSN: | 0021-9797 |
| Popis: | Adsorption of Co(H2O)62+ and Co(NH3)63+ on chlorite has been studied. For Co(H2O)62+ the adsorption has been studied at pH 3 and 7, while adsorption of Co(NH3)63+ was initiated at pH 3. In oxygen-free solutions Co(H2O)6+ is adsorbed as Co(H2O)62+. When Co(NH3)63+ interacts with chlorite the pH of the solution increases and Co3+ is reduced to Co2+. These conclusions are obtained from X-ray photoelectron spectroscopy (XPS or ESCA) studies of the binding energies of the Co 2p levels. A probable mechanism for adsorption and subsequent reduction of Co3+ is presented and discussed. |
| Databáze: | OpenAIRE |
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