Preparation and Properties of TiO2 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 spectrometry (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).