Preparation of nanostructured microspheres of Zn-Mg-Al layered double hydroxides with high adsorption property

被引:91
|
作者
Zheng, Yun-Min [1 ]
Li, Na [1 ]
Zhang, Wei-De [1 ]
机构
[1] S China Univ Technol, Sch Chem & Chem Engn, Guangzhou 510640, Guangdong, Peoples R China
基金
中国国家自然科学基金;
关键词
Layered double hydroxides; Hydrotalcite-like compounds; Adsorption; Methyl orange; PHOTOCATALYTIC DEGRADATION; ANION-EXCHANGE; RHODAMINE-B; ULTRATHIN MEMBRANES; AQUEOUS-SOLUTIONS; METHYLENE-BLUE; REMOVAL; DYE; KINETICS; LDH;
D O I
10.1016/j.colsurfa.2012.10.014
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
In this paper, hierarchical nano/micro-structured Zn-Mg-Al layered double hydroxides (ZnMgAl-LDHs) were successfully synthesized by a one-step urea-method. The morphology, structure, surface area, and adsorption properties of the prepared samples were characterized. The results show that the ZnMgAl-LDHs are of high crystallinity with large surface area, which is favorable for the adsorption. The optimum pH value for the adsorption of methyl orange onto the ZnMgAl-LDHs is 3.0. The adsorption process can be well described by the pseudo-second-order kinetic model. The adsorption isotherm of methyl orange onto the ZnMgAl-LDHs can be depicted by both Freundlich and Langmuir equations, but the latter model matches the results much better than the former one. (c) 2012 Elsevier B.V. All rights reserved.
引用
收藏
页码:195 / 201
页数:7
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