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采用溶胶-凝胶法(Sol-gol)制备了P、V共掺杂的纳米TiO2光催化材料,借助XRD、紫外-可见光谱仪对制备的光催化材料进行表征,并通过晶粒尺寸、晶相结构和吸收光谱等分析,研究了P、V共掺杂对TiO2性能的影响。研究结果表明:P、V共掺杂抑制了TiO2由锐钛矿向金红石的转变,明显延缓了TiO2相的转移;P、V双掺杂可明显减小晶粒尺寸,增大催化剂的比表面积,无论掺杂与否,随着煅烧温度的升高,TiO2晶粒的尺寸变大,比表面积减小。从紫外-可见光谱图上发现,P/V共掺杂TiO2样品与其余样品相比,红移效果最明显,对可见光吸收能力最强。
The P and V co-doped nano-sized TiO2 photocatalytic materials were prepared by sol-gel method. The prepared photocatalytic materials were characterized by XRD and UV-Vis spectroscopy. The crystal size, Structure and absorption spectra analysis of the P, V co-doping on the performance of TiO2. The results show that co-doping of P and V inhibits the transformation of TiO2 from anatase to rutile and slows the transfer of TiO2 phase. P and V doping can obviously reduce the grain size and increase the specific surface area of the catalyst , Whether doped or not, with the calcination temperature increases, the size of TiO2 grains become larger, the specific surface area decreases. From the UV-Vis spectra, it is found that P / V co-doped TiO2 samples have the most obvious red-shift effect and the strongest visible-light absorption capacity compared with the other samples.