Preparation of modified TiO2 and its photocatalytic properties

Abstract

In this chapter, tetrabutyl titanate was used as the titanium source, and the photocatalytic performance of commercial TiO 2 and self-made TiO 2 was compared by sol-gel method. Since ready-made commercial TiO 2 is not easy to be doped and modified, this chapter also performs alkali solution surface modification at the same time as self-made TiO 2 (that is, the TiO 2 to be modified is immersed in alkali solution at different pH values and then dried), and the photocatalytic performance of the two before and after the surface modification of alkali solution is compared. In order to improve the photocatalytic performance of self-made TiO 2 , this chapter modifies the iron doping of self-made TiO 2 during the preparation process to enhance its photocatalytic performance. After iron doping modification of TiO 2 , in order to further improve its performance, the modified sample was modified with alkali solution surface. In this paper, the microscopic characterization and nitrogen and oxygen catalytic performance tests of each sample were carried out, and the results showed that the photocatalytic performance of self-prepared TiO 2 was significantly better than that of commercial TiO 2 . Among the TiO 2 modified by different pH solutions, the catalytic performance was the best at pH 11.5, and the photocatalytic performance of Fe-doped TiO 2 was also improved to varying degrees compared with pure TiO 2 , among which Fe doping 0.5% contributed the most to the photocatalytic performance. After the surface modification of Fe (0.5%)-TiO 2 with the best doping amount by alkali solution, the photocatalytic performance was also improved.