Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 5, Issue 23, Pages 12411-12418Publisher
AMER CHEMICAL SOC
DOI: 10.1021/am403352y
Keywords
porous hierarchical structure; magnesium oxide; Congo red; adsorption
Funding
- National Natural Science Foundation of China [21076041, 21276046]
- Fundamental Research Funds for the Central Universities of China [DUT13RC(3)43]
- Ministry of Education Science and technology research projects
- High-Tech R & D projects in the magnesium industry of the Liaoning Province, China
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The porous hierarchical MgO with superb adsorption properties has been synthesized by a facile and scaled-up method. The X-ray powder diffraction, electron microscopy, Fourier transformed infrared, and N-2 adsorption-desorption were carried out to study the microstructure of the as-synthesized precursor and product. It has been demonstrated that the as-prepared MgO has a porous hierarchical structure and a high specific surface area (148 m(2) g(-1)). And the MgO sample exhibited super adsorption properties, with maximum adsorption capacity of 2409 mg g(-1) for Congo red, which is the highest reported value. Moreover, the adsorption process of Congo red on porous hierarchical MgO was systematically investigated, which was found to obey the pseudo-second-order rate equation and Langmuir adsorption model.
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