Preparation and Properties of TiO_2 Nanoparticles in situ Surface-modified with Salicylic Acid

The surface of TiO2 nanoparticles prepared by controlling hydrolysis of a titanium tetrachloride(TiCl4) precursor was modified with salicylic acid(SA).The prepared samples were characterized by X-ray diffraction(XRD),high resolution transmission electron microscope(HRTEM) and Fourier transformation infrared spectrome-try(FT-IR).The chemical feature and state of TiO2/SA were analyzed by X-ray photoelectron spectroscope(XPS).From the experiments,the surface-modified TiO2 nanoparticles with SA have excellent dispersibility in ethanol.As functionalized inorganic fillers,TiO2/SA nanoparticles increase the diffraction efficiency and reduce the Bragg mismatch of the photopolymer film,which have a great applied prospect in holographic data storage(HDS).