Study of Nanocrystalline TiO_2 Prepared with Raw and Modified Gelatin Dispersants

摘要

Nanocrystalline TiO_2 was prepared by the sol-gel method, and raw gelatin and its modified samples crosslinked with formaldehyde acted as dispersers in this method. Transmission electron microscope and X-ray diffractometer measurements showed, suing modified gelatin samples, the prepared TiO_2 nanocrystals have smaller particle size and more homogeneous particle distribution at the same calcining temperature. Following Fourier transform IR spectroscope analysis, the dispersion mechanism is considered to be through the bonding of TiO(NO_3)_2.H_2O with the peptide chains of gelatin by a hydrogen bond.