采用溶胶-凝胶法制备镍掺杂纳米TiO2光催化剂。通过XRD、XPS、FT-IR、UV-Vis、PL等对Ni-TiO2样品进行表征和分析,并以亚甲基蓝（MB）作为目标降解物,考察经不同热处理温度及不同掺镍量Ni-TiO2样品对MB的降解效果。结果表明所制备的Ni-TiO2样品的晶型为锐钛矿相与金红石相的混晶相,镍掺杂抑制了晶粒的生长和晶型的转变,样品的吸收阈值波长向可见光红移约55nm,提高了TiO2的光催化活性。在普通日光灯下,经500℃热处理、掺镍量与TiO2摩尔比为1∶100条件下制备的催化剂其光催化活性明显高于Degussa P25。
The TiO2 photocatalyst samples doped with nickel were prepared by sol-gel method.The samples were analyzed by XRD,XPS,FT-IR,UV-Vis,PL,etc.The photocatalytic activity of the samples doped with different nickel content and sintered at different temperature were investigated by measuring the methyl blue（MB）degradation rate under the fluorescent lamp irradiation.The results show that Ni-TiO2 samples are a mixed phase of anatase and rutile and the threshold wavelength is red shift about 55nm.The nickel doping inhibits the growth of crystallite size and transformations of crystallite phase from anatase to rutile and the photocatalytic activity is improved.The activity of the sample prepared at 500℃,n（Ni）∶n（TiO2）=1∶100 is the best under fluorescent lamp and is obviously higher than that of Degussa P25.
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