Abstract
Fe/Ni pillared montmorillonite is synthesized by precursor method. Organic pillared montmorillonite is prepared first by ion exchange with Cetyltrimethyl ammonium bromide (CTAB) using Ca-montmorillonite as raw material after pretreatment. Fe/Ni pillaring agents is prepared by copolymerization method. Then the Fe/Ni pillared montmorillonite is synthesized through ion exchanging and calcining. The structural changes and thermostability were studied through X-ray diffraction, X-ray fluorescence analysis, infrared spectroscopy and TG. analysis. The concentration of CTAB has a significant effect on interlayer space height of momtmorillonite, which can reach 3.9756nm when the concentration is 3CEC. The interlayer space height of Fe/Ni pillared montmorillonite can reach 2.4001nm when when n (Fe3+):n (Ni2+) is equal to 7:3, and it remains 1.7876nm after calcined at 400°C for 2h. This indicates that thermostability is good. Pillaring agents embedded into montmorillonite interlayer, and bonding reaction happened between the skeleton of montmorillonite ([Si4O10]n) and pillaring agents, which forms the bonding of Si-M (Fe or Ni).
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