FTIR study of photocatalytic degradation of 2-propanol in gas phase with different TiO2 catalysts
FTIR study of photocatalytic degradation of 2-propanol in gas phase with different TiO2 catalysts
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DOI：
10.1016/j.apcatb.2008.11.027
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发表时间：
2009-07-03
影响因子：
22.1
通讯作者：
Perez Pena, J.
中科院分区：
文献类型：
--
作者：
Arana, J.;Alonso, A. Pena;Perez Pena, J.
研究了不同的TiO2光催化剂在气相中降解异丙醇的光催化效率。从金红石-锐钛矿相的分布、比表面积、颗粒大小、表面羟基的分布以及Bronsted或Lewis酸中心等方面对所获得的效率进行了比较。所用催化剂为Degussa-P25(TiO2P25)、Hombikat、Millennium、Kemira和采用溶胶-凝胶法制备的S/g-TiO2光催化剂，具有较高比表面积且只存在锐钛矿相的催化剂(Hombikat和Millennium)具有最好的光催化性能。在光催化过程中观察到了TiO2P25和S/g-TiO2光催化剂的逐渐失活过程，FTIR研究表明降解机理与所用催化剂有关。在二氧化钛-P25中观察到的失活过程与羧酸盐的形成有关。(C)2008爱思唯尔B.V.保留所有权利。
The photocatalytic efficiency of different TiO2 Catalysts in the degradation of 2-propanol in gas phase has been studied. The obtained efficiencies have been compared considering the distribution of rutile-anatase phases, surface area, particle size, distribution of surface hydroxyl groups and Bronsted or Lewis acid centres. The catalysts used were Degussa-P25 (TiO2-P25), Hombikat, Millennium, Kemira and s/g-TiO2, a catalyst prepared by a sol-gel method.The best photocatalytic behaviours have been obtained with those catalysts with higher surface area and the presence of only anatase phase (Hombikat and Millennium). A progressive deactivation of TiO2-P25 and s/g-TiO2 has been observed during the photocatalytic process.FTIR studies indicated that degradation mechanisms depended on the catalyst employed. Deactivation processes observed in TiO2-P25 have been correlated with the formation of carboxylates. (C) 2008 Elsevier B.V. All rights reserved.