Issue 23, 2015

Enhancing phosphate removal from water by using ordered mesoporous silica loaded with samarium oxide

Abstract

A series of ordered mesoporous silica loaded with samarium oxide (Sm-MCM-41) were synthesized by a facile one-step sol–gel route using hexadecyltrimethylammonium bromide (CTAB) as the template, tetraethylorthosilicate (TEOS) as the silica source, and hexahydrated samarium chloride as the precursor. The as-synthesized materials with the Sm/Si molar ratio ranging from 0.2 to 0.8 were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), and N2 adsorption–desorption measurements. All obtained compounds possess an ordered hexagonal mesoporous structure with a high surface area, a large pore volume, and uniform pore size. The mesoporous composites were used as the novel adsorbents for phosphate ion (H2PO4) removal from synthetic aqueous solutions. The phosphate removal capacity of Sm-MCM-41 with a Sm/Si molar ratio of 0.6 was up to 20 mg P/g. The Sm functionalized mesoporous silica materials show a higher phosphate removal capacity compared to MCM-41 and Sm2O3 particles, making them promising candidates for water quality control and protection.

Graphical abstract: Enhancing phosphate removal from water by using ordered mesoporous silica loaded with samarium oxide

Article information

Article type
Paper
Submitted
31 Aug 2015
Accepted
24 Oct 2015
First published
30 Oct 2015

Anal. Methods, 2015,7, 10052-10060

Enhancing phosphate removal from water by using ordered mesoporous silica loaded with samarium oxide

B. Han, N. Chen, D. Deng, S. Deng, I. Djerdj and Y. Wang, Anal. Methods, 2015, 7, 10052 DOI: 10.1039/C5AY02319J

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