Green Synthesis of Calcium Carbonate With Unusual Morphologies in the Presence of Fruit Extracts

In the present investigation, we reported a novel green strategy for the biological synthesis of calcium carbonate crystals using water-soluble polysaccharides extracted from the apple and pear.The resultant crystals were characterized by scanning electron microscopy (SEM), Fourier transform infrared (FT-IR) spectroscopy, and X-ray powder diffractometry (XRD).The results showed that water-soluble polysaccharides as a soft template were easy to induce calcium carbonate with unusual morphologies (such as straw bundles-like).Based on the time-dependent growth of CaCO 3 particles, possible mechanisms were proposed for the formation of straw bundle-like CaCO 3 microspheres with secondary structures in the presence of water-soluble polysaccharides.