Shimura Naoki, Ogawa Makoto
Graduate School of Science and Engineering, Waseda University, Nishiwaseda 1-6-1, Tokyo 169-8050, Japan.
J Colloid Interface Sci. 2007 Aug 15;312(2):311-6. doi: 10.1016/j.jcis.2007.02.091. Epub 2007 Mar 15.
Hexagonal platy composite particles with a hydrotalcite core and a nanoporous silica shell with a thickness of ca. 100 nm were synthesized by the reaction of a Mg-Al hydrotalcite with a homogeneous aqueous solution containing tetraethoxysilane, hexadecyltrimethylammonium chloride, ammonia and methanol at 3 degrees C. The calcination of the products at 500 degrees C in air led to the composite particle with a Mg/Al mixed oxide core and a nanoporous silica shell. Hexagonal platy particles of nanoporous silica with a pore diameter of 2.3 nm and BET surface area of 700 m(2) (g of silica)(-1) were obtained by removing the Mg/Al mixed oxide core.
通过使镁铝水滑石与含有四乙氧基硅烷、十六烷基三甲基氯化铵、氨和甲醇的均相水溶液在3℃下反应，合成了具有水滑石核和厚度约为100nm的纳米多孔二氧化硅壳的六边形片状复合颗粒。产物在空气中500℃煅烧后得到具有Mg/Al混合氧化物核和纳米多孔二氧化硅壳的复合颗粒。通过去除Mg/Al混合氧化物核，获得了孔径为2.3nm、BET表面积为700 m²/（g二氧化硅）的纳米多孔二氧化硅六边形片状颗粒。
