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纳米孔硅铝层柱蒙脱石复合材料的制备和性能研究

, PP. 17-22

Keywords: 复合材料,纳孔粘土,蒙脱石,合成,催化

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Abstract:

以蒙脱石为原料、十六烷基三甲基溴化铵和十二烷胺为结构导向剂,直接利用正硅酸乙酯和异丙醇铝混合物为层柱前驱体,合成了新型纳米孔径硅铝层柱蒙脱石复合材料。运用XRD、TG、FT-IR和N2等温吸附-脱附等技术表征复合材料。结果表明:合成材料具有大通道(层间距为3.45nm)、孔径较大且分布窄(平均孔径为2.0nm)、高比表面积(SBET=502.0m2/g)和高热稳定性(大于750℃)。和硅层柱多孔粘土复合材料相比,铝的掺入对孔结构和热稳定性影响较小,但明显提高了酸性和酸强度。

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