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首页> 外文期刊>Materials Research Bulletin >Thermal decomposition behavior of Cu-Al layered double hydroxide, and ethylenediaminetetraacetate-intercalated Cu-Al layered double hydroxide reconstructed from Cu-Al oxide for uptake of Y~(3+) from aqueous solution
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Thermal decomposition behavior of Cu-Al layered double hydroxide, and ethylenediaminetetraacetate-intercalated Cu-Al layered double hydroxide reconstructed from Cu-Al oxide for uptake of Y~(3+) from aqueous solution

机译：Cu-Al层状双氢氧化物的热分解行为和乙二胺四乙酸盐插层的Cu-Al氧化物重构的Cu-Al层状双氢氧化物的热分解行为，用于从水溶液中吸收Y〜（3+）

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摘要

CO_3~(2-)-intercalated Cu-Al layered double hydroxide (CO_3Cu-Al LDH) was calcined to yield Cu-Al oxide, and then ethylenediaminetetraacetate-intercalated Cu-Al LDH (edta-Cu-AI LDH) was prepared by reconstructing Cu-Al oxide in edta solution. Decomposition of CO_3Cu-Al LDH occurred in four stages. The production of Cu-Al oxide was caused by the thermal decomposition of CO_3Cu-Al LDH until the third stage. The first stage was the elimination of adsorbed surface water and interlayer water in CO_3Cu-Al LDH. The second and third stages were the dehydroxylation of the brucite-like octahedral layers and the elimination of CO_3~(2-)- intercalated in the interlayers. The edta-Cu-Al LDH was found to take up Y~(3+) in aqueous solution. The uptake of Y~(3+) was caused not only by the chelating function of Hedta~(3-) in the interlayer but also by the chemical behavior of Cu-Al LDH itself. The edta-Cu-Al LDH was found to selectively take up rare earth ions from a mixed solution. The degree of uptake was high, in the order Sc~(3+) > Y~(3+) > La~(3+) for all time durations, which was attributable to differences among the stabilities of Sc(edta)-, Y(edta)- and La(edta)-.
机译：煅烧CO_3〜（2-）插层的Cu-Al层状双氢氧化物（CO_3Cu-Al LDH），得到Cu-Al氧化物，然后通过重构制备乙二胺四乙酸酯插层的Cu-Al LDH（edta-Cu-Al LDH） EDTA溶液中的Cu-Al氧化物。 CO_3Cu-Al LDH的分解分为四个阶段。直到第三阶段，CO_3Cu-Al LDH的热分解导致产生Cu-Al氧化物。第一步是消除CO_3Cu-Al LDH中吸附的地表水和夹层水。第二阶段和第三阶段是水镁石样八面体层的脱羟基作用和消除中间层中插入的CO_3〜（2-）-。发现edta-Cu-Al LDH在水溶液中占据Y〜（3+）。 Y〜（3+）的吸收不仅是由于中间层中Hedta〜（3-）的螯合功能引起的，还归因于Cu-Al LDH本身的化学行为。发现edta-Cu-Al LDH从混合溶液中选择性吸收稀土离子。在所有时间段内，摄取程度较高，顺序为Sc〜（3+）> Y〜（3+）> La〜（3+），这归因于Sc（edta）-的稳定性差异， Y（edta）-和La（edta）-。

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  • 来源
    《Materials Research Bulletin》 |2012年第12期|4216-4219|共4页
  • 作者

    Tomohito Kameda; Kazuaki Hoshi; Toshiaki Yoshioka;

  • 作者单位

    Graduate School of Environmental Studies, Tohoku University, 6-6-07 Aoba, Aramaki, Aoba-ku, Sendai 980-8579, Japan;

    Graduate School of Environmental Studies, Tohoku University, 6-6-07 Aoba, Aramaki, Aoba-ku, Sendai 980-8579, Japan;

    Graduate School of Environmental Studies, Tohoku University, 6-6-07 Aoba, Aramaki, Aoba-ku, Sendai 980-8579, Japan;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    A. Composites; A. Layered compounds;

    机译：A.复合材料;A.层状化合物;

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