...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>New Journal of Chemistry >Promoting effects of H_2 on photooxidation of volatile organic pollutants over Pt/TiO_2
【24h】

Promoting effects of H_2 on photooxidation of volatile organic pollutants over Pt/TiO_2

机译：H_2对Pt / TiO_2上挥发性有机污染物光氧化的促进作用

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Superior photocatalytic activity and durability of Pt/TiO_2 for decomposing volatile organic pollutants (typically aromatic compounds) have been obtained by adding trace H_2 into an O_2-rich photooxidation system.The order of photodegradation efficiencies for volatile organic compounds is cyclohexane < acetone < benzene < toluene < ethylbenzene.Exceptional stability of Pt/TiO_2 for benzene photodegradation is still maintained after 22 h of testing,by the repeated use of the catalyst four times.The promoting effects of H_2 in the photocatalysis were studied by infrared spectroscopy (IR),spin-trapping electron paramagnetic resonance (EPR) and surface photovoltage spectroscopy (SPS).Results demonstrated that the introduced H_2 has several beneficial effects on heterogeneous photocatalysis,namely,a comparatively clean surface of Pt/ TiO_2 with no persistent aromatic intermediates,an increased number of surface hydroxyl radicals in the photocatalytic process,and an enhanced separation efficiency of photogenerated electron-hole pairs.A mechanism is proposed to elucidate the promoting effect of H_2 on the photooxidation of volatile organic pollutants over Pt/TiO_2.
机译：通过向富含O_2的光氧化体系中添加痕量H_2，Pt / TiO_2具有很好的分解挥发性有机污染物（典型为芳香族化合物）的光催化活性和持久性。甲苯<乙苯。通过反复使用四次催化剂，在测试22小时后，Pt / TiO_2对苯的光降解仍保持了出色的稳定性。通过红外光谱（IR），自旋研究了H_2在光催化中的促进作用。捕获电子顺磁共振（EPR）和表面光电压能谱（SPS）。结果表明，引入的H_2对多相光催化具有多种有益作用，即Pt / TiO_2表面相对清洁，没有持久的芳香族中间体，光催化过程中的表面羟基自由基，并提高了分离效率提出了阐明H_2对Pt / TiO_2上挥发性有机污染物光氧化的促进作用的机理。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号