氨基功能化 Fe3O4-SiO2 磁性复合材料的制备以及对䓛 的吸附性能探究

柳 枫, 李 军生, 阎 柳娟, 黄 国霞, 马 纪
广西科技大学广西糖资源绿色加工重点实验室

摘要

利用 50nm 的 Fe3O4 磁性纳米粒子，依次用正硅酸乙酯 (TEOS) 和 3 - 氨丙基三乙氧基硅烷 (APTES) 进行表面修
饰，将制备得到的 Fe3O4-SiO2-NH2 磁性纳米粒子用于吸附去除 CHR。采用 FT-IR、XRD 和 SEM 对其形貌和晶体结构进行
了表征。探究了 pH、接触时间、温度和吸附剂用量等因素对去除率的影响。结果表明，在 pH=5 条件下，温度为 35℃，反
应 30min,吸附剂用量为 100mg∙L
-1时，氨基化的 Fe3O4-SiO2复合粒子对 CHR 吸附率达到 80.4%。

关键词

䓛; Fe3O4-SiO2；吸附；氨基化

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