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δ型二氧化锰/埃洛石的制备及其对亚甲基蓝的吸附性能

DOI: 10.7521/j.issn.0454-5648.2014.02.18

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Abstract:

利用埃洛石(HNTs)和δ型二氧化锰(δ-MnO2)两者各自优异的特性,在HNTs表面负载δ-MnO2,成功制备了δ-MnO2/HNTs复合材料。通过X射线衍射、Fourier红外光谱、N2吸附-脱附曲线、高分辨透射电子显微镜、激光粒度仪和吸附试验分别对HNTs、制备的MnO2和MnO2/HNTs复合材料进行了研究,探讨了MnO2负载量、pH值和吸附剂用量等因素对亚甲基蓝吸附性能的影响。结果表明负载在HNTs上的MnO2为δ型,且表面富含羟基,δ-MnO2/HNTs复合材料对亚甲基蓝有优异的吸附能力。吸附动力学数据很好地符合准二级速率方程,吸附模型符合Langmuir吸附等温线。

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