The effect of water on the performance of TiO2 in photocatalytic selective alkane oxidation

被引：29

作者：

Carneiro, Joana T. ^{[2
]}

Yang, Chieh-Chao ^{[1
]}

Moulijn, Jacob A. ^{[2
]}

Mul, Guido ^{[1
]}

机构：

[1] Univ Twente, Inst Mech Proc & Control IMPACT, PhotoCatalyt Synth Grp, NL-7500 AE Enschede, Netherlands

[2] Delft Univ Technol, NL-2628 BL Delft, Netherlands

来源：

JOURNAL OF CATALYSIS | 2011年 / 277卷 / 02期

关键词：

Photocatalysis; TiO2; Selective oxidation; Deactivation; TITANIUM-DIOXIDE; NEAT CYCLOHEXANE; AIR OXIDATION; PHOTOOXIDATION; DECOMPOSITION; SURFACE; TOLUENE; TRICHLOROETHYLENE; DEACTIVATION; HYDROCARBONS;

D O I：

10.1016/j.jcat.2010.10.019

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Deactivation of TiO2 is hampering practical implementation of photocatalytic alternatives for energetically intensive selective oxidation processes. In the present study, humidification of the air stream is demonstrated to be a solution to this problem for well-defined photocatalysts, such as Solaronix TiO2, in selective oxidation of cyclohexane. Water establishes enhanced product desorption and stimulates decomposition of deactivating surface carboxylate species, as clearly demonstrated by ATR-FTIR spectroscopy. For high surface area TiO2, such as Hombikat UV100, water molecules adsorb too strongly, and addition of water vapor to the air stream is detrimental to catalyst performance. (C) 2010 Elsevier Inc. All rights reserved.

引用

页码：129 / 133

页数：5

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