Influence of pH on the synthesis of the Zn-Al-nitrate layered double hydroxide and the exchange of nitrate by phosphate ions

被引：65
|
作者：
Legrouri, A
Badreddine, M
Barroug, A
De Roy, A
Besse, JP
机构：
[1] Al Akhawayn Univ, Sch Sci & Engn, Ifrane 53000, Morocco
[2] Univ Cadi Ayyad, Fac Sci Semlalia, Chim Phys Lab, Marrakech 40001, Morocco
[3] Univ Clermont Ferrand 2, Lab Mat Inorgan, F-63177 Clermont Ferrand, France
来源：
JOURNAL OF MATERIALS SCIENCE LETTERS | 1999年 / 18卷 / 13期
关键词：
D O I：
10.1023/A:1006647505203
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The effect of pH on the preparation of the Zn-Al-NO3 precursor and on the exchange of nitrate by orthophosphate ions was investigated. Both the precursors and the phosphate-exchanged phases, prepared at different pH values, were characterized by X-ray powder diffraction and Fourier transform infrared spectroscopy. At low pH values, the crystallinity decreased due to the partial dissolution of the layered double hydroxides in the acidic solutions. The interlayer space was observed to decrease with increased pH, due to the predominant decrease in the size of the phosphate species, leading to stronger attractions between the anions and the positively charged layers.
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页码：1077 / 1079
页数：3
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