A facile route using highly arrayed PMMA spheres as hard template for the fabrication of 3D ordered nanoporous MgO
Using magnesium nitrate as Mg source and regularly packed polymethyl methacrylate (PMMA) spheres synthesized via a combined strategy of emulsifier-free emulsion polymerization and water floating technique as hard template, we fabricated ordered nanoporous magnesium oxide. The synthesized PMMA and MgO samples were characterized by N2 adsorption-desorption, X-ray diffraction, high-resolution scanning electron microscopy, transmission electron microscopy, and selected area electron diffraction. It is shown that the synthesized PMMA spheres possessed a uniform diameter of ca. 284 nm and were in a highly ordered array, the MgO generated by using the PMMA-templating method exhibited polycrystallinity with three-dimensionally (3D) ordered pores. BET surface area of the synthesized MgO sample is 100.7 m2/g, pore volume is 0.46 cm3/g, wall thickness is 4~24 nm, and pore sizes are in the range of 10~120 nm. Such a 3D igh-surface-area nanoporous strongly basic MgO is useful in the applications of catalyst supports and acidic gas adsorbents.
Hard-templating synthesis Polymethyl methacrylate microsphere Three-dimensional porous MgO Electron microscopy
李惠宁 戴洪兴 何洪 区泽堂
北京工业大学环境与能源工程学院化学化工系，催化化学与纳米科学研究室，北京100022 香港浸会大学化学系，表面分析及研究中心，九龙塘，香港
国际会议
成都
英文
2007-11-19（万方平台首次上网日期，不代表论文的发表时间）