Preparation of B,Ni Co-doped TiO_2 Photocatalyst and Its Degradation Performances for Malachite Green

With boric acid,nickel nitrate,four butyl titanate as raw materials,pure TiO2 and different proportion of B,Ni co-doped TiO2 photocatalysis were prepared by sol-gel method.The samples were characterized by UV-vis spectrophotometer.UV-vis spectra shows that the absorption edge of B,Ni co-doped TiO2 shifts to long wavelength,beneficial for the increase of visible light catalytic activity.Using malachite green as substrate under different conditions,the degradation performance of samples was studied.The results show that the photodegradation efficiency of malachite green dye reaches a higher level under the conditions as follows: the doping ratio B∶Ni=1∶2,the amount of catalyst is 0.15 g,pH =9,the temperature is 30 ℃.