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Issue 19, 2012
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Rationally designed functional macroporous materials as new adsorbents for efficient phosphorus removal

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Abstract

Novel phosphorus (P) adsorbents with a high adsorption capacity (up to 2.272 mmol g−1) and excellent adsorption performance in a low P concentration range of 1 mg L−1 have been successfully developed. The material achieves up to 96% P removal within 30 min with an initial concentration of 1 mg L−1. The adsorbents are prepared using macroporous ordered silica foams (MOSF) as the host. After modification by lanthanum species (La–MOSF), the two sides of the silica layer (∼5 nm in thickness) are coated by two layers of lanthanum oxide each with a thickness of ∼2.3 nm, forming a unique sandwich-like wall structure. Due to the very large pore size of La–MOSF (∼100 nm), after P adsorption the formed LaPO4 species are confined inside the pores without causing pore blocking, allowing for a high loading of lanthanum oxide and a high adsorption capacity. Moreover, the thin layer nature of lanthanum oxide facilitates the reaction between lanthanum oxide and phosphate ions, leading to the enhanced performance for the adsorption in low P concentration ranges. These rationally designed macroporous materials with outstanding performance have great potentials in water quality control and protection.

Graphical abstract: Rationally designed functional macroporous materials as new adsorbents for efficient phosphorus removal

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Publication details

The article was received on 19 Dec 2011, accepted on 13 Mar 2012 and first published on 13 Apr 2012


Article type: Paper
DOI: 10.1039/C2JM16681J
J. Mater. Chem., 2012,22, 9983-9990

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    Rationally designed functional macroporous materials as new adsorbents for efficient phosphorus removal

    J. Yang, P. Yuan, H. Chen, J. Zou, Z. Yuan and C. Yu, J. Mater. Chem., 2012, 22, 9983
    DOI: 10.1039/C2JM16681J

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