Transformation of planar Mögel Al13 coagulant during the dilution and aging process
Transformation of planar Mögel Al13 coagulant during the dilution and aging process
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DOI：
10.1016/j.colsurfa.2012.06.029
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发表时间：
2013-01
期刊：
影响因子：
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通讯作者：
Z. Bi;Chen Feng;Dongsheng Wang;Xiao-peng Ge;Hong-xiao Tang
中科院分区：
文献类型：
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作者：
Z. Bi;Chen Feng;Dongsheng Wang;Xiao-peng Ge;Hong-xiao Tang
Transformation of a novel planar Mögel Al13(Al13(OH)24(H2O)2415+, simplified as M-Al13) coagulant in the dilution and aging process was investigated with Ferron colorimetric method, electrospray ionization mass spectrometry (ESI-MS) and27Al NMR spectroscopy. Special attention has been paid to the transformation process of M-Al13to stereo Keggin Al13(ɛ-AlO4Al12(OH)24(H2O)127+, simplified as K-Al13). M-Al13was found to be an unstable aluminum species and could be decomposed into oligomers as Al1, Al2and Al3when dissolved in solution. These newly formed oligomers were also found to polymerize into K-Al13by self-assembly during the dilution process. More K-Al13species could be continuously formed at the initial aging period of the diluted solution. On the whole, the hydrolysis and aging behavior of planar M-Al13in aqueous solution is quite different from those of the K-Al13species, which may provide insight into the structure re-organization mechanism of polymeric Al species in solution.
