Issue 75, 2017, Issue in Progress

Rational design of hierarchical macroporous–mesoporous magnesium silicate for highly efficient removal of organic dye and Pb2+

Abstract

A facile hydrothermal strategy has been developed to fabricate the hierarchical macroporous–mesoporous magnesium silicate (HMMgS) using macroporous siliceous foams (MOSF) as the silicon precursor and sacrificial template. The macroporous structure of HMMgS with a large surface area (565 m2 g−1) and high pore volume (0.94 cm3 g−1) is reproduced from the template MOSF, which can provide various active sites for the adsorption of pollutants. The mesopores stem from the stacking of magnesium silicate nanosheets on the scaffold of MOSF, facilitating the mass transportation of contaminants to the interfaces. Consequently, the usage efficiency of active sites on the surface can be greatly enhanced. Therefore, HMMgS exhibits the excellent adsorption capacities of 602 mg g−1 for methylene blue (MB) and 253 mg g−1 for Pb2+. Besides, HMMgS also demonstrates extraordinary recyclability with easy separation by sedimentation, showing its promising potential in practical wastewater treatment.

Graphical abstract: Rational design of hierarchical macroporous–mesoporous magnesium silicate for highly efficient removal of organic dye and Pb2+

Supplementary files

Article information

Article type
Paper
Submitted
08 Aug 2017
Accepted
02 Oct 2017
First published
06 Oct 2017
This article is Open Access
Creative Commons BY license

RSC Adv., 2017,7, 47225-47234

Rational design of hierarchical macroporous–mesoporous magnesium silicate for highly efficient removal of organic dye and Pb2+

C. Zhao, J. Yang and B. Jiang, RSC Adv., 2017, 7, 47225 DOI: 10.1039/C7RA08766G

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in other publications without requesting further permissions from the RSC, provided that the correct acknowledgement is given.

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