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利用溶胶-凝胶法制备了镍掺杂的二氧化钛,采用紫外可见分光光度计、傅里叶红外分光光度计、X衍射仪(XRD)、扫描电镜(SEM)等测试手段对结果进行了表征。表征结果表明在550℃下煅烧的产物主要是锐钛型二氧化钛,镍的掺杂使得二氧化钛的紫外可见反射光谱明显红移,且镍掺杂二氧化钛的粒度减小,团聚程度下降。以活性艳蓝KN-R为模型降解目标物,通过比较镍掺杂二氧化钛、纯二氧化钛以及标准P25二氧化钛的光催化性能发现镍掺杂二氧化钛的光催化活性最好。当钛酸正丁酯/乙醇比为1:25;钛酸正丁酯/冰乙酸比为1:1;钛酸正丁酯/硝酸镍比为1 000:3;煅烧温度为550℃,煅烧时间为2 h时,镍掺杂二氧化钛的光催化效率最高,达到73.3%。
Nickel - doped titanium dioxide was prepared by sol - gel method. The results were characterized by UV - visible spectrophotometer, Fourier transform infrared spectroscopy, X - ray diffraction and scanning electron microscopy. Characterization results show that the product calcined at 550 ℃ is mainly anatase titania. The doping of nickel makes the UV reflection spectrum of titania clear red shift, and the particle size of Ni-doped titania decreases and the agglomeration degree decreases. The photocatalytic activity of Ni-doped TiO 2 was investigated by comparing the photocatalytic properties of Ni-doped TiO 2, pure TiO 2 and standard P25 TiO 2. When n-butyl titanate / ethanol ratio is 1:25, n-butyl titanate / glacial acetic acid ratio is 1: 1, n-butyl titanate / nickel nitrate ratio is 1000: 3, calcination temperature is 550 ℃, calcination When the time is 2 h, the photocatalytic efficiency of nickel-doped titanium dioxide is the highest, reaching 73.3%.