Preparation of Zr/Y co-doped TiO2 photocatalyst and degradation performance of hydroquinone
2022
Tao, Xiumei | Zhu, Lei | Wang, Xun | Chen, Xueqi | Liu, Xian
In this paper, Y–ZrO₂–TiO₂ photocatalyst was prepared by sol–gel method, the titanium source was tetrabutyl titanate, and the precursors were zirconium nitrate pentahydrate and yttrium nitrate hexahydrate. For the photocatalytic effect of Y–ZrO₂–TiO₂ to hydroquinone, these effects were investigated: doping ratios of Zr/Y, calcination conditions, pH, etc. And the materials were characterized by XRD, TEM-EDS, XPS, PL, ESR, etc. The results showed that the optimum preparation conditions of Y–ZrO₂–TiO₂ photocatalyst were as follows: the molar ratio of doping was Ti: Zr: Y = 100:6:0.5, the calcination temperature was 500 °C, and the calcination time was 2 h; the optimum reaction conditions were as follows: the dosage of Y–ZrO₂–TiO₂ was 1 g/L, and pH value was 6.96. The degradation rate of hydroquinone under 365-nm UV lamp for 50 min could reach 96.58%, while the degradation rates of pure TiO₂, Y–TiO₂, and ZrO₂–TiO₂ under the same conditions were 33.95%, 79.55%, and 90.30%, respectively. It can be seen that the addition of elements Zr and Y improves the photocatalytic performance of TiO₂.
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