Citation: CAO Yin-Di, DANG Li-Qin, BAI Dan, LEI Zhi-Bin, LIU Mei-Ying. Adsorption of Lysozymes on Fe/CMK-5 Composites Synthesized by Chemical Vapor Deposition[J]. Acta Physico-Chimica Sinica, 2010, 26(06): 1593-1598. doi: 10.3866/PKU.WHXB20100614
化学气相沉积法合成Fe/CMK-5及其对溶菌素的吸附性能
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.
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关键词:
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吸附
- / Fe/CMK-5复合材料
- / 中孔碳
- / 化学气相沉积
- / 溶菌素
English
Adsorption of Lysozymes on Fe/CMK-5 Composites Synthesized by Chemical Vapor Deposition
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 pHof 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.
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Key words:
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Adsorption
- / Fe/CMK-5 composites
- / Mesoporous carbon
- / Chemical vapor deposition
- / Lysozyme
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