Syntheses of Nanocrystalline Mg-Al-LDHs and PO43-, P2O74- Anion-Pillared Layered Double Hydroxides under the Conditions of Microwave

Abstract

Abstract: Nanocrystalline [Mg-Al-CO₃] layered double hydroxides were prepared by using microwave irradiation and varied rate of dripping alkali. Then [Mg-Al-PO₄] and [Mg-Al-P₂O₇] layered
double hydroxides were successfully synthesized by the direct reaction of free PO^3-₄ and P₂O^4-₇ with [Mg-Al-CO₃] layered double hydroxides precursor using microwave technique
and the anion-intercalation method. By using this method [Mg-Al-CO₃] layered double hydroxides with a particle size of about 10nm to 40nm were produced. The effect of microwave and
the rate of dripping alkali on [Mg-Al-CO₃] layered double hydroxides was discussed. And the samples thus obtained were characterized by FT-IR, TEM and XRD. The results show that the initial
interlayer carbonate ions can be completely replaced by PO^3-₄ and P₂O^4-₇ under the controlled microwave conditions employed in a short time.

Key words: nanocrystalline, the anion-intercalation method, microwave, layered double hydroxides

CLC Number:

TQ314
TB34

ZHANG Ze-Jiang,LAN Bin,FENG Liang-Rong,LU Shao-Jie,QIU Fa-Li. Syntheses of Nanocrystalline Mg-Al-LDHs and PO₄^3-, P₂O₇^4- Anion-Pillared Layered Double Hydroxides under the Conditions of Microwave[J]. Journal of Inorganic Materials.

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Syntheses of Nanocrystalline Mg-Al-LDHs and PO₄^3-, P₂O₇^4- Anion-Pillared Layered Double Hydroxides under the Conditions of Microwave

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