Preparation and Photo Absorption Property of Coupled Semiconductor NiO-TiO_2

NiO-TiO2 coupled semiconductors were synthesized by organic templates method.Their pore distribution,crystal structure,surface composition and photo Absorption properties were investigated by techniques of N2 adsorption-desorption,XRD,TPR,TEM and UV-Vis DRS.The results show that the NiO-TiO2 coupled semiconductors prepared by organic templates exist in nanotube or nanobelt with mesporous structure,and the BET surface area is higher than 100m2/g.The NiO particles disperse well on the surface of TiO2,and the strong interaction between NiO and TiO2 results in the formation of NiTiO3.The p-n couple effect of NiO and TiO2 extends distinctly the photo Absorption field and decreases the Eg from 3.82eV to 3.49eV when the addition amout of NiO is increased from 2% to 10%.