• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Environmental Science and Health. A, Toxic/Hazardous Substances & Environmental Engineering >Laser-enhanced photocatalytic degradation of organic pollutants from water using ZnO semiconductor catalyst
【24h】

Laser-enhanced photocatalytic degradation of organic pollutants from water using ZnO semiconductor catalyst

机译：使用ZnO半导体催化剂激光增强光催化降解水中的有机污染物

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

Wastewater contaminated with organic pollutants creates serious environmental problems. Laser induced photocatalysis has been investigated for removal of organic pollutant like phenol from water. The important mechanism for degradation of phenol by UV laser irradiation is redox reactions triggered by semiconductor catalyst in presence of water. In this study the potential of a ZnO semiconductor catalyst has been explored as an effective catalyst for the photodegradation of phenol using a Nd: YAG laser-emitting at 355 nm in UV-radiation in a batch reactor. The influences of different parameters such as catalyst concentration, UV-radiation intensity, and pH on the extent of photo degradation have been investigated. Overall degradation of phenol achieved was 70% after 60 minutes of laser irradiation of 100 ppm phenol solution in water. The reaction rate constant fit a first-order reaction model for phenol degradation and was estimated as 0.0088 min~(-1). This study proved that laser induced photocatalytic removal of phenol is highly efficient as compared with the broadband spectral sources such as lamps being applied in majority of setups worldwide.
机译：被有机污染物污染的废水造成了严重的环境问题。已经研究了激光诱导的光催化以从水中去除有机污染物，例如苯酚。通过紫外激光辐射降解苯酚的重要机理是在水存在下由半导体催化剂引发的氧化还原反应。在这项研究中，已探索出使用ZnO半导体催化剂作为一种有效的催化剂的潜力，该催化剂是使用Nd：YAG激光在间歇反应器中以355 nm在紫外线辐射下光降解苯酚的有效催化剂。研究了催化剂浓度，紫外线辐射强度和pH等不同参数对光降解程度的影响。激光照射100 ppm苯酚水溶液60分钟后，苯酚的总降解率为70％。反应速率常数符合苯酚降解的一级反应模型，估计为0.0088 min〜（-1）。这项研究证明，与宽带光谱源（例如在全世界大多数设置中使用的灯）相比，激光诱导的光催化去除苯酚是高效的。

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