In the present paper, barium carbonate crystals with higher-order superstructures have successfully been synthesized via a rapid microwave-assisted route in the aqueous system with sodium dodecyl sulfate (SDS), employing BaCl2·2 H2O and NaHCO3 as starting reagents. X-Ray powder diffraction (XRD) analysis showed that the product was an orthorhombic BaCO3. Scanning electron microscopy (SEM) observations showed that the higher-order superstructures were formed by the self-assembly of BaCO3 nanoflakes. Some factors, including the microwave heating power, the time, the concentration of SDS, the initial concentration of reactants, pH value of the system and kinds of surfactants, influencing the morphology of the BaCO3 crystals were systematically studied. Researches showed that SDS played a crucial role in the formation of BaCO3 superstructures.
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