Synthesis of Nanorod-Shaped Cobalt Hydroxycarbonate and Oxide with the Mediation of Ethylene Glycol

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	Synthesis of Nanorod-Shaped Cobalt Hydroxycarbonate and Oxide with the Mediation of Ethylene Glycol
	X. W. Xie ; P. J. Shang ; Z. Q. Liu ; Y. G. Lv ; Y. Li ; W. J. Shen
刊名	Journal of Physical Chemistry C
	2010
卷号	114 期号:5 页码:2116-2123
关键词	layered double hydroxides hydrotalcite-like compounds anion-exchange reactions co3o4 nanorods solvothermal decomposition selective synthesis thermal-conversion crystal-structure brucite-like carbonate
ISSN号	1932-7447
中文摘要	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. Co(3)O(4) nanorods with a diameter of about 10 nm and a length of 200-300 nm are then obtained by calcination of the nanorod-shaped cobalt hydroxycarbonate precursor. This spontaneous shape transformation from the precursor to the oxide is attributed to the unique thermal stability of the cobalt hydroxycarbonate nanorods with the presence of ethylene glycol and acetate anions in the interlayers. The Co(3)O(4) nanorods show a much superior catalytic activity for CO oxidation to the conventional spherical Co(3)O(4) nanoparticles, clearly demonstrating the morphology-dependent nanocatalysis.
原文出处	://WOS:000274269700022
公开日期	2012-04-13
内容类型	期刊论文
源URL	[http://210.72.142.130/handle/321006/31600]
专题	金属研究所_中国科学院金属研究所
推荐引用方式 GB/T 7714	X. W. Xie,P. J. Shang,Z. Q. Liu,et al. Synthesis of Nanorod-Shaped Cobalt Hydroxycarbonate and Oxide with the Mediation of Ethylene Glycol[J]. Journal of Physical Chemistry C,2010,114(5):2116-2123.
APA	X. W. Xie,P. J. Shang,Z. Q. Liu,Y. G. Lv,Y. Li,&W. J. Shen.(2010).Synthesis of Nanorod-Shaped Cobalt Hydroxycarbonate and Oxide with the Mediation of Ethylene Glycol.Journal of Physical Chemistry C,114(5),2116-2123.
MLA	X. W. Xie,et al."Synthesis of Nanorod-Shaped Cobalt Hydroxycarbonate and Oxide with the Mediation of Ethylene Glycol".Journal of Physical Chemistry C 114.5(2010):2116-2123.