Preparation of Ag＋/TiO2 Composite Coating Film for Preservation of Nanfeng Citrus

Using tetrabutyl titanate as the precursor,silver nitrate as the load agent,silver-doped titanium dioxide coating film was prepared by sol-gel method.Three agent samples were characterized by X-ray diffraction（ XRD） analysis to investigate the crystal structure,which confirmed a synergistic antibacterial effect.The antibacterial and preservative effects of silver-doped titanium dioxide coating film on Nanfeng citrus were investigated preliminarily. Nutritional indicators of ripe Nanfeng citrus before and after preservation were detected to investigate the preservative properties of silver-doped titanium dioxide coating film and compare the effects of different components of composite coating film. The results showed that Ag+/TiO2 composite coating film exhibited high antibacterial and preservative effects on Nanfeng citrus under visible light illumination condition.