Visible Light Photocatalytic Degradation Performance of Metal (Fe, Ce, Ni, Mn, Bi)-Doped Sodium Tantalite Perovskite

Metal ion doping is the most widely used means to improve the photocatalytic performance of semiconductor materials, which can adjust the band gap, broaden the range of optical response and construct impurity levels. The high efficiency modified NaTaO3 perovskite catalyst with good structural and catalytic properties was synthesized by a simple hydrothermal reaction method. A variety of analysis and testing techniques, such as XRD, SEM, DRS, XPS and EPR, were used to analyze the structure properties of the prepared materials. The results show that the influence mechanism of different metal introduction on the structure and properties of the NaTaO3 perovskite was different. Metal doping promoted the bond angle of Ta-O-Ta close to 180 & DEG;, which restrains the recombination of the photogenerated electron-holes in the crystal. As Ce is introduced into the perovskite, the CeO2 forms and agglomerates around the perovskite, which improves the electron transport performance. With the narrower band gap, the Ce-modified perovskite shows that the degradation rate of ARS is 84% after 180 min of photoreaction. The species of h+, O2- and & BULL;OH play different roles in improving the performance of the photocatalytic degradation process.

Automated summary

Metal ion doping is a widely used method to improve the photocatalytic performance of semiconductor materials. In this study, a high-efficiency modified NaTaO3 perovskite catalyst was synthesized using metal ion doping, and various analysis and testing techniques were used to analyze its structural properties. The results show that the introduction of different metals has different effects on the structure and properties of NaTaO3, with Ce improving electron transport performance and the Ce-modified perovskite showing high efficiency in the photocatalytic degradation of dyes.