Magnetic 3-D ordered macroporous silica templated from binary colloidal crystals and its application for effective removal of microcystin

作者：Liu Jia; Cai Yue; Deng Yonghui^*; Sun Zhenkun; Gu Dong; Tu Bo; Zhao Dongyuan

来源：Microporous and Mesoporous Materials, 2010, 130(1-3): 26-31.

DOI：10.1016/j.micromeso.2009.10.008

• Macroporous materials
• Colloidal crystal
• Magnetic property
• Microcystin

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.

• 出版日期2010-5
• 单位复旦大学