Issue 26, 2015

Core–shell structured MgO@mesoporous silica spheres for enhanced adsorption of methylene blue and lead ions

Abstract

Core–shell structured MgO@mesoporous silica spheres are synthesized by a two-step programmed method. MgO@mesoporous silica exhibits a high BET specific surface area of 567 m2 g−1 and a pore volume of 1.08 cm3 g−1. The stable mesoporous silica coating not only serves as a strong shell to improve the mechanical stability of MgO, but also enriches the adsorbates in the mesopores to reach a higher adsorption rate. The core–shell MgO@mesoporous silica spheres exhibit excellent removal capabilities of 3297 mg g−1 for Pb2+ and 420 mg g−1 for methylene blue, which are much higher than those of MgO itself.

Graphical abstract: Core–shell structured MgO@mesoporous silica spheres for enhanced adsorption of methylene blue and lead ions

Supplementary files

Article information

Article type
Paper
Submitted
10 Feb 2015
Accepted
13 Feb 2015
First published
13 Feb 2015

RSC Adv., 2015,5, 20440-20445

Core–shell structured MgO@mesoporous silica spheres for enhanced adsorption of methylene blue and lead ions

C. Gui, Q. Li, L. Lv, J. Qu, Q. Wang, S. Hao and Z. Yu, RSC Adv., 2015, 5, 20440 DOI: 10.1039/C5RA02596F

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