共沉淀法制备了C u-Mg-A l层状超分子化合物,X 射线衍射图谱和热重分析表征了材料的结构,并研究了材料对溶液中碘离子的吸附去除性能.制备的材料为具有层状结构的 C u-Mg-A l 的超分子化合物,具有结构“记忆效应”,层间可以吸附碘,层板上的铜对碘也有特异化学作用,增强材料对碘的吸附能力.在优化制备和吸附条件下,Cu-Mg-Al层状超分子化合物对碘离子的饱和吸附量为279．15 mg/g,远高于普通层状氢氧化镁铝的66．61 mg/g.材料可作为碘及放射性碘污染的吸附去除剂.
The Cu-Mg-Al layer supramolecular materials(Cu-Mg-Al LDHs)was successfully prepared by copre-cipitation method,characterized by XRD and DTA-TG-DTG,and used as the adsorption materials to iodine. The Cu-Mg-Al LDHs was layered hydroxides with memory effect.The iodine could intercalate the interlayer of Cu-Mg-Al LDHs and the Cu on the laminate could adsorb iodine specifically.The saturated adsorption capacity of Cu-Mg-Al LDHs to iodine was 279.15 mg/g,it was much higher than that of ordinary Mg/Al layered double hydroxide (66.61 mg/g).The materials might be used as the adsorption materials to radioactive iodine.
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