کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1696053 | 1519117 | 2010 | 8 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Rapid synthesis of aluminium polycations by microwave assisted hydrolysis of aluminium via decomposition of urea and preparation of Al-pillared montmorillonite Rapid synthesis of aluminium polycations by microwave assisted hydrolysis of aluminium via decomposition of urea and preparation of Al-pillared montmorillonite](/preview/png/1696053.png)
The aim of this work is to provide a new efficient method of preparation of aluminium polycations/oligomers, and especially [AlO4Al12(OH)24(H2O)12]7+ (Al13). The microwave assisted forced homogeneous hydrolysis of aluminium through breakdown of urea (M–Al–Urea) is studied and compared with aluminum hydrolyzed with OH− ions (C–Al–OH). M–Al–Urea solutions are characterized by UV–Visible (‘Ferron’ kinetic assay) and 27Al NMR spectroscopies. Al13-sulphate precipitated from M–Al–Urea and C-Al-OH solutions are studied by XRD, TGA and SEM. Al-pillared montmorillonites are prepared with M–Al–Urea solutions as pillaring agent and characterized by XRD, BET, SEM-EDS, TGA and ATR techniques. The advantage of M–Al–Urea solutions as pillaring agent when compared to C–Al–OH is highlighted in the present study.
Journal: Applied Clay Science - Volume 48, Issues 1–2, March 2010, Pages 138–145