Meng Xiuhong, Duan Linhai, Qin Huibo, Xie Xiaohua, Umar Ahmad, Wang Haiyan, Wang Qiang
J Nanosci Nanotechnol. 2014 Sep;14(9):7340-4. doi: 10.1166/jnn.2014.9216.
The sub-micron polystyrene (PS) microspheres with adjustable size were firstly synthesized using emulsion polymerization method by adding only a small amount of emulsifier. Then, three dimensionally ordered macroporous alumina with mesoporous walls and adjustable macropore size was facilely prepared by the colloidal template method. The alumina and PS spheres were characterized by nanoparticle size analyzer, SEM, XRD and N2 adsorption. The results show that the polystyrene microsphere has adjustable single-sized pore with diameter in the range of 100-350 nm and the yield is higher than that prepared by soap free emulsion polymerization. The alumina materials as prepared using the PS colloidal crystals as the template, had ordered meso-macroporous structures and adjustable apertures. The mesopores (about 3.6 nm) in γ-alumina were formed by controlling the heat treatment of alumina precursor. BET surface area and pore volume of the hierarchical alumina as obtained can reach to 241.3 m2/g and 0.33 cm3/g, respectively.
首先通过仅添加少量乳化剂采用乳液聚合法合成了尺寸可调的亚微米聚苯乙烯（PS）微球。然后，通过胶体模板法轻松制备了具有介孔壁且大孔尺寸可调的三维有序大孔氧化铝。采用纳米粒度分析仪、扫描电子显微镜（SEM）、X射线衍射仪（XRD）和N₂吸附对氧化铝和PS微球进行了表征。结果表明，聚苯乙烯微球具有直径在100 - 350 nm范围内的可调单尺寸孔，且产率高于无皂乳液聚合法制备的产率。以PS胶体晶体为模板制备的氧化铝材料具有有序的介观大孔结构且孔径可调。通过控制氧化铝前驱体的热处理在γ - 氧化铝中形成了介孔（约3.6 nm）。所制备的分级氧化铝的BET表面积和孔体积分别可达241.3 m²/g和0.33 cm³/g。
