Abstract
In this study, we successfully established an additive-free microwave hydrothermal (M-H) route by only using Al2(SO4)3 aqueous solution and urea as raw materials. Core-shell structured boehmite was synthesized at 180°C for the first time via a M-H route. The final product was characterized by techniques of X-ray diffraction (XRD), transmission electron microscopy (TEM) and scanning electron microscope (SEM). On account of the fact that less reaction time usually means less energy consumption or more eco-friendly design, the M-H reaction time was successfully reduced to only 40min by utilizing full microwave heating power and appropriate dosage of urea. To investigate the possible mechanism and influencing factors associated with the morphology and crystal form evolution process, samples subjected to different reaction durations were prepared and characterized.
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