Synthesis and characterization of BaCO₃ nanoparticles with different morphologies by microwave homogenous precipitation

BaCO₃ nanoparticles with different morphologies including needle-like, rod-like, bird's nest-like and flower-like have been successfully synthesized by the microwave homogeneous precipitation method using BaCl ₂ · 2H₂O, NaOH and (NH₂)₂CO as raw materials with the help of different guide reagents, such as citric acid (CA), sodium triphosphate (STPP) and ethylene diamine tetraacetic acid (EDTA). Their phases and morphologies were characterized by X-ray powder diffraction (XRD) and scanning electron microscopy (SEM), respectively. The characterization results show that different guide reagents have little effect on the phase structure and composition of products while they play significant roles in determining the morphology of products. All the synthesized BaCO₃ nanoparticles have typical orthorhombic structures that are well-crystallized.