Journal
MICROPOROUS AND MESOPOROUS MATERIALS
Volume 130, Issue 1-3, Pages 26-31Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.micromeso.2009.10.008
Keywords
Macroporous materials; Colloidal crystal; Magnetic property; Microcystin
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Funding
- NSF of China [20890123, 20721063, 20871030]
- State Key Basic Research Program of PRC [2006CB932302]
- Shanghai Leading Academic Discipline Project [B108]
- Shanghai Rising Star Program [08QA14010]
- Doctoral Program Foundation of State Education Commission of China [200802461013]
- STCSM [08DZ2270500]
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Magnetic 3-D ordered macroporous siliceous materials were conveniently fabricated by combination of a simple co-sedimentation of binary colloidal system of PMMA spheres and magnetite nanoparticles and the infiltration of silica precursors. The SEM and TEM observations indicate that the obtained magnetic 3-D ordered macroporous silica materials have face-centered cubic (fcc) packing structure with ordered macropore of similar to 200 nm and interconnected windows of about 50 nm. Magnetic property characterization shows that the magnetic 3-D ordered macroporous silica materials possess high magnetization (19.2 emu/g) and superparamagentism. By utilization of their ordered macroporous structure with large entrances and good affinity for biomacromolecules as well as high magnetization, a fast and efficient removal of microcystin in water with high removal efficiency (>93%) and removal capacity (3.3 ng MC/mg) was achieved with the help of an applied magnetic field. (C) 2009 Elsevier Inc. All rights reserved.
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