Solar light-activated photocatalytic degradation of gas phase diethylsulfide on WO3-modified TiO2 nanotubes
Solar light-activated photocatalytic degradation of gas phase diethylsulfide on WO3-modified TiO2 nanotubes
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DOI：
10.1016/j.apcatb.2013.02.041
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发表时间：
2013-07
影响因子：
22.1
通讯作者：
M. Grandcolas;Thomas Cottineau;A. Louvet;N. Keller;V. Keller
中科院分区：
文献类型：
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作者：
M. Grandcolas;Thomas Cottineau;A. Louvet;N. Keller;V. Keller
人工太阳光响应性高表面积WO3改性TiO2纳米管已被有效地用于执行二乙硫醚的气相光催化降解，作为模拟活性的化学战起泡剂，被称为芥子气。它们通过在最终煅烧步骤之前用钨酸盐浸渍水热合成的钛酸盐纳米管来制备。WO3含量，进口二乙基硫醚浓度和相对湿度的光催化活性的影响作为时间的函数上流已被调查方面的DES去除效率和失活行为。用4wt.%改性TiO2纳米管WO3的加入提高了光催化剂的DES去除效率和抗硫酸盐失活能力。提出了表面物种与光催化剂的在线活性和行为之间的相关性，以及可能的反应机理途径。
Artificial solar light responsive high surface area WO3-modified TiO2nanotubes have been efficiently used for performing the gas phase photocatalytic degradation of diethylsulfide, taken as simulant for the live yperite Chemical Warfare blister Agent, known as mustard gas. They were prepared by impregnating hydrothermally-synthesized titanate nanotubes with tungstate salt prior to the final calcination step. The influence of the WO3content, the inlet diethylsulfide concentration and the relative humidity on the photocatalytic activity as a function of time on stream has been investigated in terms of DES removal efficiency and of deactivation behavior. Modification of TiO2nanotubes with 4wt.% of WO3enhanced the photocatalytic activity in terms of DES removal efficiency and of resistance to sulfate deactivation. Correlation between the surface species and the on-stream activity and behavior of the photocatalysts was proposed, as well as possible reaction mechanism pathways.