Preparation and characterization of mixed hydroxy-Fe-Al pillared montmorillonite with large basal spacing |
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Authors: | Zeng Xiu-qiong Liu Wei-ping |
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Institution: | 1. Department of Chemistry, Zhejiang University, Hangzhou 310028, China 2. Institute of Environmental Science,Zhejiang University, Hangzhou 310028, China |
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Abstract: | Mixed hydroxy-Al-Fe pillared montmorillonites with large basal spacing were successfully prepared through cation-exchanging of Na - montmorillonite with mixed hydroxy-Al and hydroxy-Fe pillaring solutions made from hydrolysis of corresponding metal salts, followed by calcination to convert hydroxy-Al and hydroxy-Fe into intercalated polycations. According to XRD analysis, the basal spacing d(001) of pillared products dramatically enlarged from 12.7 *! in the Na-montmorillonite to 81 *! in the hydroxy-Fe -montmorillonite and 77.5 *! in mixed hydroxy-Al-Fe-montmorillonite. The N_2 BET surface areas of the pillared montmorillonites also greatly increased to more than 200 m 2/g as compared to about 27 m 2/g for the Na-montmorillonite. IR analysis of hydroxy-Fe, and mixed hydroxy-Al-Fe pillared montmorillonites revealed a new absorption vibration at 1384 cm -1 wavelength. XRF elemental analysis data also showed a high content of Fe_2O_3 in the hydroxy-Fe pillared montmorillonite. |
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Keywords: | hydroxy-Al hydroxy-Fe montmorillonite preparation characterization |
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