| 镁铁和镁铝双羟基复合金属氧化物的结构和性能差异 |
| Studies on Structures and Properties of MgAl and MgFe Layered Double Hydroxides |
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| 摘要: |
| 关键词: 镁铁水滑石 镁铝水滑石 结构规整性 程序升温XRD IR |
| 基金项目: |
| Abstract: Layered Double Hydroxides MgFe-LDH and MgAl-LDH have been prepared by the method involving separate nucleation and ageing steps. The structure analyses for these two materials show that the values of the parameters both a and c of MgAl-LDH are smaller than that of MgFe-LDH though their structures are similar, and MgAl-LDH with higher crystallinity is more easily formed than MgFe-LDH in the same preparing conditions. The IR analyses manifest that the structures of layer sheets and the orderings of the anions in the interlayer regions of MgAl-LDH are more regular than that of MgFe-LDH. The temperature programmed XRD analyses reveal that the diffraction peak of 003 reflections for MgAl-LDH could be seen after calcining at 300℃, while this peak for MgFe-LDH disappears after calcining at 200℃. Together with the TG-DTA analysis it can be concluded that the thermal stability of MgAl-LDH is obviously higher than that of MgFe-LDH. |
| Keywords: MgFe-LDH MgAl-LDH structure orderings temperature programmed XRD |
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| 张慧,齐荣,段雪.镁铁和镁铝双羟基复合金属氧化物的结构和性能差异[J].无机化学学报,2002,18(8):833-838. |
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