Synthesis and characterizations of NiTiO_3 nanoparticles prepared by the sol-gel process

摘要

Nanocrystalline nickel titanate (NiTiO_3) composite powders were prepared by the sol-gel process combined with a surfactant-assisted template method. The resulting powders were calcined at different temperatures ranging from 150 deg C to 750 deg C for 2h in air. The results revealed that a pure hexagonal phase of NiTiO_3 could be obtained at the low temperature of 750 deg C. The phase evolution of NiTiO_3 was investigated by X-ray diffraction patterns, Fourier-transform infrared spectroscopy, and X-ray photoelectron spectroscopy. Particle size and morphology were studied by transmission electron microscopy.