Preparation: |
prepared by dissolving 1000 g of Al(NO3)3·9H20
(Chem Supply) in 3 L of Milli-Q water, resulting solution was titrated slowly with 4.0 M NaOH under N2 until the pH reached 4.5 and was then placed in an oven at 40 °C for 2 h, gibbsite slurry was then transferred into 75 mm cellulose acetate dialysis tubing and dialysed against Milli-Q water at 50 °C for 4 weeks, water was changed twice daily for the first week, then changed once a day for the remaining 3 weeks; freeze dried. |