Thermal decomposition of hydrotalcites with variable cationic ratios
作者： Sara J. Palmer , H. J. Spratt , R. L. Frost
DOI: 10.1007/S10973-008-8992-4
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摘要: Abstract Thermal analysis complimented with evolved gas mass spectrometry has been applied to hydrotalcites containing carbonate prepared by coprecipitation and varying divalent/trivalent cation ratios. The resulting materials were characterised XRD, TG/DTG determine the stability of synthesised. Hydrotalcites formula Mg4(Fe,Al)2(OH)12(CO3)·4H2O, Mg6(Fe,Al)2(OH)16(CO3)·5H2O, Mg8(Fe,Al)2(OH)20(CO3)·8H2O formed intercalation anion as a function cationic ratio. XRD showed slight variations in d-spacing between hydrotalcites. thermal decomposition consists two steps 300 400°C, attributed simultaneous dehydroxylation decarbonation hydrotalcite lattice. Water loss ascribed occurs steps, where first step is due partial lattice, while second the...
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