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以溶胶-凝胶法制备钛酸锶钡,研究了制备条件及稀土掺杂对光催化影响。用大红染料模拟废水中难降解的有机物,以大红染料脱色率的变化来表征催化剂BST的光催化性能。结果表明,离子掺杂对大红染料的降解效果比钛酸锶钡的降解效果有所提高。掺入镧离子时降解率可达85%,提高60%;掺入钇离子时降解率可达65%,提高40%;两种离子掺杂时降解率可达70%,提高45%。
Barium strontium titanate was prepared by sol-gel method. The effects of preparation conditions and rare earth doping on photocatalytic activity were studied. The red dye was used to simulate the refractory organic matter in wastewater, and the photocatalytic performance of the catalyst BST was characterized by the change of decolorization rate of the red dye. The results show that the effect of ion doping on the degradation of red dye is better than that of barium strontium titanate. Incorporation of lanthanum ions degrades up to 85%, an increase of 60%; yttrium ions doped degradation rate up to 65%, increased 40%; two ion doping degradation rate of up to 70%, an increase of 45%.