Characterization of the aluminum hydroxide microcrystals formed in some alcohol–water solutions
作者： Maria Lúcia Pereira Antunes , Helena de Souza Santos , Persio de Souza Santos
DOI: 10.1016/S0254-0584(01)00535-1
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摘要: Abstract The crystallization in water of non-crystalline Al(OH)3 to form somatoids aluminum trihydroxide bayerite is altered into other hydroxides when certain water-soluble alcohols are added. crystalline and phases formed under the different environments were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), selected area (SAED), elemental microanalysis using EDS/TEM scanning (SEM). Ethylene glycol leads nordstrandite fibrillar pseudoboehmite. Methanol produces gibbsite Ethanol has effects according its concentration: 20% bayerite+nordstrandite+fibrillarpseudoboehmite, 50% yields gibbsite+bayerite+pseudoboehmite, but 94% only Glycerol Isopropyl alcohol nordstrandite. presence pseudoboehmite several systems suggests that monohydroxide acts as an intermediate trihydroxides during aging those alcohol–water solutions.
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