Controllable synthesis of α- and β-MnO2: cationic effect on hydrothermal crystallization

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	Controllable synthesis of α- and β-MnO2: cationic effect on hydrothermal crystallization
	Huang, XK ; Lv, DP ; Yue, HJ ; Attia, A ; Yang, Y ; Yang Y(杨勇)
刊名	http://dx.doi.org/10.1088/0957-4484/19/22/225606
	2008-06-04
关键词	OCTAHEDRAL MOLECULAR-SIEVE MANGANESE-DIOXIDE ION-EXCHANGE ELECTROCHEMICAL PROPERTIES MNO2 NANOSTRUCTURES LITHIUM BATTERIES ALKALI-METAL OXIDE NANOWIRES OXIDATION
英文摘要	alpha- and beta-MnO(2) were controllably synthesized by hydrothermally treating amorphous MnO(2) obtained via a reaction between Mn(2+) and MnO(4)(-), and cationic effects on the hydrothermal crystallization of MnO(2) were investigated systematically. The crystallization is believed to proceed by a dissolution-recrystallization mechanism; i.e. amorphous MnO(2) dissolves first under hydrothermal conditions, then condenses to recrystallize, and the polymorphs formed are significantly affected by added cations such as K(+), NH(4)(+) and H(+) in the hydrothermal systems. The experimental results showed that K(+)/NH(4)(+) were in competition with H(+) to form polymorphs of alpha- and beta-MnO(2), i.e., higher relative K(+)/NH(4)(+) concentration favoured alpha-MnO(2), while higher relative H(+) concentration favoured beta-MnO(2).
语种	英语
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/62295]
专题	化学化工－已发表论文
推荐引用方式 GB/T 7714	Huang, XK,Lv, DP,Yue, HJ,et al. Controllable synthesis of α- and β-MnO2: cationic effect on hydrothermal crystallization[J]. http://dx.doi.org/10.1088/0957-4484/19/22/225606,2008.
APA	Huang, XK,Lv, DP,Yue, HJ,Attia, A,Yang, Y,&杨勇.(2008).Controllable synthesis of α- and β-MnO2: cationic effect on hydrothermal crystallization.http://dx.doi.org/10.1088/0957-4484/19/22/225606.
MLA	Huang, XK,et al."Controllable synthesis of α- and β-MnO2: cationic effect on hydrothermal crystallization".http://dx.doi.org/10.1088/0957-4484/19/22/225606 (2008).