Department of Chemistry and Shanghai Key Lab of Molecular Catalysis and Innovative Materials, the State Key Laboratory of Molecular Engineering of Polymers, and Advanced Materials Laboratory, Fudan University , Shanghai 200433, P. R. China.
J Am Chem Soc. 2014 Feb 5;136(5):1884-92. doi: 10.1021/ja4099356. Epub 2014 Jan 23.
A facile and controllable interface-directed coassembly (IDCA) approach is developed for the first time to synthesize uniform discrete mesoporous silica particles with a large pore size (ca. 8 nm) by using 3-dimensional macroporous carbon (3DOMC) as the nanoreactor for the confined coassembly of template molecules and silica source. By controlling the amount of the precursor solution and using Pluronic templates with different compositions, we can synthesize mesoporous silica particles with diverse morphologies (spheres, hollow spheres, and hemispheres) and different mesostructure (e.g., 2-D hexagonal and 3D face centered cubic symmetry), high surface area of about 790 m(2)/g, and large pore volume (0.98 cm(3)/g). The particle size can be tunable from submicrometer to micrometer regimes by changing the macropore diameter of 3DOMC. Importantly, this synthesis concept can be extended to fabricate multifunctional mesoporous composite spheres with a magnetic core and a mesoporous silica shell, large saturated magnetization (23.5 emu/g), and high surface area (280 m(2)/g). With the use of the magnetic mesoporous silica spheres as a magnetically recyclable absorbent, a fast and efficient removal of microcystin from water is achieved, and they can be recycled for 10 times without a significant decrease of removal efficiency for microcystin.
首次开发了一种简便可控的界面导向共组装（IDCA）方法，通过使用 3 维大孔碳（3DOMC）作为模板分子和硅源受限共组装的纳米反应器，可合成具有大孔径（约 8nm）的均匀离散介孔二氧化硅颗粒。通过控制前体溶液的用量并使用具有不同组成的 Pluronic 模板，我们可以合成具有不同形貌（球体、空心球体和半球体）和不同介孔结构（例如二维六方和 3D 面心立方对称性）的介孔二氧化硅颗粒，其比表面积高达约 790m2/g，孔体积为 0.98cm3/g。通过改变 3DOMC 的大孔直径，可以将粒径从亚微米级调至微米级。重要的是，这种合成概念可以扩展到制造具有磁性核和介孔二氧化硅壳的多功能介孔复合球体，其具有大的饱和磁化强度（23.5emu/g）和高的比表面积（280m2/g）。使用磁性介孔二氧化硅球作为可磁回收的吸附剂，可以快速有效地从水中去除微囊藻毒素，并且它们可以回收 10 次而对微囊藻毒素的去除效率没有明显下降。
