Determination of the photocatalytic activity of TiO2 with high adsorption capacity
Determination of the photocatalytic activity of TiO2 with high adsorption capacity
复制标题
高吸附量TiO2光催化活性的测定
DOI：
10.1007/s11144-011-0326-z
复制
发表时间：
2011
期刊：
影响因子：
--
通讯作者：
A. Morawski
中科院分区：
文献类型：
--
作者：
M. Janus;E. Kusiak;A. Morawski
光催化常用于水中有机化合物的分解，例如染料的分解。计算染料分解过程中光催化剂的光催化活性存在许多问题，特别是对于具有高吸附容量的光催化剂，因为很难判断染料是被光催化分解还是仅在光催化剂表面吸附。在这两种情况下，染料都从水中消失，但最佳情况是染料在光催化剂表面既被吸附又被分解。此外，当不同的光催化剂具有较强的吸附能力时，对其光催化活性进行比较也是一个问题。本文提出了一种测定高吸附量光催化剂光催化活性的新方法。用活性红（单偶氮）和直接绿（聚偶氮）染料测定了商品TiO2 （degussa P25、锐钛矿TiO2和碳改性锐钛矿TiO2）的吸附能力和光催化活性。
Photocatalysis is often used for the decomposition of organic compounds in water, e.g., for dye decomposition. There are many problems with calculating the photocatalytic activity of photocatalysts during dye decomposition, especially in the case of photocatalysts with a high adsorption capacity because it is difficult to say whether a dye is photocatalytically decomposed or whether it is only adsorbed on photocatalyst surface. In both cases, the dye disappears from the water, but the optimal situation is when the dye is both adsorbed and decomposed on photocatalyst surface. Moreover, it is problematic to compare the photocatalytic activity of different photocatalysts when they have strong adsorption capacity. In this study a new method of measuring photocatalytic activity of photocatalysts with high adsorption capacity is presented. Reactive Red (monoazo) and Direct Green (poliazo) dyes were used to determine adsorption capacity and photocatalytic activity of commercial TiO2Degussa P25, anatase TiO2and carbon modified anatase TiO2.