Synthesis of Nanorod-Shaped Cobalt Hydroxycarbonate and Oxide with the Mediation of Ethylene Glycol
| Autor: | Wenjie Shen, Yongge Lv, Zhi-Quan Liu, Pan-Ju Shang, Xiaowei Xie, Yong Li |
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| Rok vydání: | 2010 |
| Předmět: |
Cobalt hydroxide
Inorganic chemistry Layered double hydroxides Oxide chemistry.chemical_element engineering.material Surfaces Coatings and Films Electronic Optical and Magnetic Materials chemistry.chemical_compound General Energy chemistry Chemical engineering engineering Carbonate Nanorod Physical and Theoretical Chemistry Sodium carbonate Cobalt Ethylene glycol |
| Zdroj: | The Journal of Physical Chemistry C. 114:2116-2123 |
| ISSN: | 1932-7455 1932-7447 |
| DOI: | 10.1021/jp911011g |
| Popis: | Cobalt hydroxycarbonate nanorods are prepared by precipitation of cobalt acetate with sodium carbonate in ethylene glycol. Structural and chemical analyses of the intermediate phases during the precipitation and aging process revealed that amorphous cobalt hydroxide acetate is formed at the initial stage where ethylene glycol acts as a simple solvent and a coordinating agent. With the slow addition of sodium carbonate, carbonate anions are gradually intercalated into the interlayers by replacing the acetate and hydroxyl anions. This anion-exchange process induces a dissolution−recrystallization process in which ethylene glycol serves as a rate-controlling agent, producing rod-like cobalt hydroxide carbonate. During the aging process, ethylene glycol gradually incorporates into the structure to replace the carbonate and acetate anions; the interlayer structure is collapsed, and the nanorod-shape turns into thin crimped sheets. Co3O4 nanorods with a diameter of about 10 nm and a length of 200−300 nm are the... |
| Databáze: | OpenAIRE |
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