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The Study on Preparation of TiO2/CaCO3 Composites by absorption phase nanoreactor technique. The nanosized CaCO3-TiO2.nH2O composite was prepared by absorption phase nanoreactor technique. Solvent replacement experiment provided direct evidence that there was a water-rich adsorption layer on the surface of calcium carbonate, in the layer , TiO2 nanoparticles were prepared and then laid over surface of calcium carbonate. The characteristics of this composite including the chemical composition, superficial crystal structure, morphology, size, and the linkage of the composite particles are fully measured by EDS, XRD, TEM, FT-IR and XPS. All the results reveal that amorphous TiO2 has been coated on the surface of CaCO3 and there exist chemical bonds between them. TiO2 has been in situ prepared on the surface of calcium carbonate, TiO2 coating decreases with the increase of reaction temperature, TiO2 and CaCO3 are not simply mixed together but connected by some chemical

Preparation of TiO2/CaCO3 Composites by Adsorption Phase Nanoreactor Technique