Controllable fabrication of mesoporous MgO with various morphologies and their absorption performance for toxic pollutants in water

被引：121

作者：

Gao, Cuiling ^{[1
]}

Zhang, Wenli ^{[2
]}

Li, Hongbian ^{[1
]}

Lang, Leiming ^{[1
]}

Xu, Zheng ^{[1
]}

机构：

[1] Nanjing Univ, Sch Chem & Chem Engn, Solid State Microstruct Lab, State Key Lab Coordinat Chem, Nanjing 210093, Peoples R China

[2] Jiangsu Univ, Sch Chem & Chem Eng, Zhenjiang 212003, Peoples R China

来源：

CRYSTAL GROWTH & DESIGN | 2008年 / 8卷 / 10期

基金：

中国国家自然科学基金;

关键词：

D O I：

10.1021/cg8004147

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We have developed a method of controllable synthesis of MgO with various morphologies by adjusting the composition and phase structure of magnesium carbonate hydrate (MCH). The phase structure of the MCH varied from monoclinic Mg-5(CO3)(4)(OH)(2)(H2O)(4) to hexagonal MgCO3 by changing the concentration of Mg2+ and HCO3-; the corresponding morphology of the MCH ranges from nanoflakes and flowerlike microspheres composed of nanoflakes to layer-Like rhombohedra and microspheres composed of rhombohedra. After annealing, four kinds of mesoporous cubic MgO micronano structures were obtained with their original morphologies. Because of the high specific surface area, MgO mesoporous nanoflakes and flowerlike microsphers exhibited excellent absorption performance for common toxic heavy metal ions and organic pollutants and are expected to be a potential absorbent in wastewater treatment.

引用

页码：3785 / 3790

页数：6

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