Synthesis, characterization and photocatalytic properties of nickel-doped TiO_2 and nickel titanate nanoparticles

摘要

The nickel-doped titanium dioxide, nickel titanate and pure titanium dioxide nanopowders were prepared by the Sol-gel method. Nanopowders annealed at 700 ℃ to form a crystalline structure and eliminate organic impurities. Products morphological and optical properties were characterized by X-ray diffraction, energy dispersive X-ray microanalysis, UV-Vis diffuse reflectance spec-troscopy, scanning electron microscopy, transmission electron microscopy and Fourier transform infrared spec-troscopy techniques. By scanning electron microscopy and transmission electron microscopy was revealed the nano-size of the products and the agglomerated nature of very fine particles of powders by increasing nickel content. Samples were used for photodecomposition of Rhodamine B in a liquid phase under ultraviolet light irradiation. The results showed that appropriate content of nickel can effectively enhance the photocatalytic activity of titanium dioxide nanopowder.