分别以2种不同聚合度的聚乙二醇(PEG) PEG600和PEG2000为模板导向剂,采用水热法合成ηAl2O3(PEG600)和ηAl2O3(PEG2000)介孔纤维,借助XRD、TEM和N2吸附测试对材料进行表征,研究了PEG聚合度对介孔η-Al2O3纤维性质的影响.通过静态吸附平衡实验考察了介孔η-Al2O3纤维对亚甲基蓝的吸附特性.结果表明:2种模板导向剂均可用于合成介孔ηAl2O3纤维.PEG聚合度对介孔结构、比表面积、孔体积和孔径有较大影响.η-Al2O3(PEG600)的比表面积和孔体积分别为189.899 m2.g-1和0.329 cm3.g-1,分别是η-Al2O3 (PEG2000)的1.4倍和1.2倍,平均孔径也比ηAl2O3 (PEG2000)的大.2种介孔ηAl2O3纤维对亚甲基蓝的吸附机制均为多分子层吸附.根据BET多层分子吸附方程计算得η-Al2O3(PEG600)和η-Al2O3(PEG2000)对亚甲基蓝的平衡吸附量分别为256.391 3 mg·g-1和204.045 9 mg·g-1.
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