以SBA-15为模板,二茂铁为碳源,利用化学气相沉积(CVD)法合成了Fe/CMK-5复合材料.用粉末X射线衍射、低温N2吸附、热重分析、透射电镜等对复合材料进行了表征.结果表明复合材料中碳以CMK-5结构存在,Fe颗粒均匀地分布在CMK-5的骨架中,通过调节CVD时间可改变Fe/CMK-5的结构参数.在pH值为11的缓冲溶液中研究了Fe/CMK-5系列复合材料对溶菌素(lysozyme)的吸附性能,考察了溶菌素在Fe/CMK-5孔道内部的结构稳定性以及在不同pH值溶液中的泄露量.
Fe/CMK-5 composites were synthesized by chemical vapor deposition(CVD) using ferrocene as carbon precursor and SBA-15 as silica template.The composites were characterized by powder X-ray diffraction(XRD),N2 adsorption,thermogravimetric analysis(TGA) and transmission electron microscopy(TEM).We found that the carbon in the composites existed as CMK-5,while the metallic Fe nanoparticles were homogenously embedded in the framework of mesoporous carbon.The textural parameters of the Fe/CMK-5 composites could be adjusted in a facile manner by changing the CVD duration time.The obtained Fe/CMK-5 composites were applied as adsorbents for the adsorption of lysozymes(Lzs) in the buffer solution at a pH of 11.The stabilities of the Lzs confined in the mesopores of the Fe/CMK-5 composites were investigated and the Lz leakage from the Fe/CMK-5 composite was also measured in buffer solutions with different pH values.