Preparation of C-TiO₂ composite with assistance of microcrystalline cellulose and its adsorption properties for Cd²⁺

C-TiO₂ composites were successfully prepared via sol-gel method with assistance of microcrystalline cellulose(CMC). The structure, components and morphology of C-TiO₂ composites have been fully studied. The results of XRD show that:C-TiO₂ composite has the structure of anatase with high crystallinity; the analyses of SEM, TEM and XPS give the evidence that cellulose has dual effects on the preparation of the C-TiO₂ composite:it is the precursor of carbon, and it also works as dispersant which makes TiO₂ well dispersive. The adsorption experiments of Cd²⁺ has been carried out to evaluate the adsorption property by the C-TiO₂ composite. Compared with the TiO₂ prepared without cellulose, C-TiO₂ composite has high adsorption. The adsorption amount of Cd²⁺ reaches 37.15 mgg^-1, which is 214.5% as higher as that without cellulose. At the same time, C-TiO₂ composite has excellent adsorption efficiency, which makes C-TiO₂ a good candidate for water treatment.