Preparation and Photocatalytic Properties of Nano Ni/TiO<sub>2</sub> Composite in Alginate
New nano nickel-doped titanium dioxide composites had been produced by a conducting sol-gel method. The alginate gel was used as a template to prevent the conglomeration of the inorganic materials. In this experiment, nickel nitrate, tetrabutyl titanate and sodium alginate were used as main materials to prepare different amount nickel-doped TiO 2 particles. The amount of Ni was studied from 0 to 9 mol.-% (where mol.-% refers to the Ni/TiO 2 molar ratio), and the Ni/TiO 2 composites were characterized by XRD, FT-IR, TG-DTA, and we carried out doping amount, catalyst amount and illumination time influence on photocatalytic performance of nano Ni/TiO 2 composite in aqueous methyl orange. The activity of TiO 2 gradually increased with the increasing of doping amount, and there was highest catalytic efficiency when Ni = 9 % mol.