载体形式和掺杂元素对纳米TiO_2光催化降解甲基橙的影响

Different kind of supported and doped nanocrystalline TiO_2 photocatalytic degradation of methyl orange

通过对比不同形式玻璃载体负载TiO2紫外光催化降解甲基橙的能力以及不同元素掺杂对光催化降解的影响,探讨了提高TiO2光催化降解有机污水能力的方法。结果表明,毛细玻璃管负载的TiO2由于限域微米空间效应的作用,其光催化能力明显好于玻璃片和玻璃珠载体;同时,比较了TiO2掺杂元素Pb、N和Fe在可见光下的催化能力,得出掺杂Pb为最佳,降解率达到94.8%,以期为负载以及掺杂元素提升TiO2光催化降解污水的处理能力提供借鉴。

The experiment compared the efluence of different kinds of glass support nanocrystalline TiO2 photocata lytie degradation of methyl orange under UV light, which aiming to improve the photocatalytic ability of TiO2. The result showed that due to the effect of confined nanospace, TiO2 supported on glass capillaries had better photocatalytic ability than glass slides and glass beads. And the photocatalytic ability of Pb, N and Fe doped TiO2 under visible light were also in vestigated, The result showed that Pb doped TiO2 had the best in three,which was 94.8%, This research hoped to make contribution to the photocatalytic degradation of polluted water by supported and doped TiO2.