...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Environmental Science & Technology >Multilayer Heterojunction Anodes for Saline Wastewater Treatment: Design Strategies and Reactive Species Generation Mechanisms
【24h】

Multilayer Heterojunction Anodes for Saline Wastewater Treatment: Design Strategies and Reactive Species Generation Mechanisms

机译：用于盐水处理的多层异质结阳极：设计策略和反应物种生成机制

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

Multilayer heterojunction SbSn/CoTi/Ir anodes, which consist of Ir_(0.7)Ta_(0.3)O_2 bottom layers coated onto a titanium base, Co-TiO_2 interlayers, and overcoated discrete Sb-SnO_2 islands, were prepared by spray pyrolysis. The Ir_(0.7)Ta_(0.3)O_2 bottom layer serves as an Ohmic contact to facilitate electron transfer from semiconductor layers to the Ti base. The Co-TiO_2 interlayer and overcoated Sb-SnO_2 islands enhance the evolution of reactive chlorine. The surficial Sb-SnO_2 islands also serve as the reactive sites for free radical generation. Experiments coupled with computational kinetic simulations show that while ·OH and Cl· are initially produced on the SbSn/CoTi/Ir anode surface, the dominant radical formed in solution is the dichlorine radical anion, Cl_2·~-. The steady-state concentration of reactive radicals is 10 orders of magnitude lower than that of reactive chlorine. The SbSn/CoTi/Ir anode was applied to electrochemically treat human wastewater. These test results show that COD and NH_4~+ can be removed after 2 h of electrolysis with minimal energy consumption (370 kWh/kg COD and 383 kWh/kg NH_4~+). Although free radical species contribute to COD removal, anodes designed to enhance reactive chlorine production are more effective than those designed to enhance free radical production.
机译：通过喷涂热解法制备了多层异质结SbSn / CoTi / Ir阳极，该阳极由涂覆在钛基底上的Ir_（0.7）Ta_（0.3）O_2底层，Co-TiO_2中间层和外涂层离散的Sb-SnO_2岛组成。 Ir_（0.7）Ta_（0.3）O_2底层用作欧姆接触，以促进电子从半导体层转移到Ti基。 Co-TiO_2夹层和包覆的Sb-SnO_2岛增强了活性氯的释放。表面的Sb-SnO_2岛也可作为自由基生成的反应位点。实验与计算动力学模拟相结合表明，虽然在SbSn / CoTi / Ir阳极表面最初生成·OH和Cl·，但溶液中形成的主要自由基是二氯自由基阴离子Cl_2·〜-。反应性自由基的稳态浓度比反应性氯的稳态浓度低10个数量级。 SbSn / CoTi / Ir阳极用于电化学处理人类废水。这些测试结果表明，电解2小时后，可以以最小的能耗（370 kWh / kg COD和383 kWh / kg NH_4〜+）除去COD和NH_4〜+。尽管自由基物质有助于COD的去除，但设计用于提高反应性氯生成量的阳极比设计用于提高自由基生成量的阳极更为有效。

著录项

  • 来源
    《Environmental Science & Technology》 |2016年第16期|8780-8787|共8页
  • 作者

    Yang Yang; Jieun Shin; Justin T. Jasper; Michael R. Hoffmann;

  • 作者单位

    Linde + Robinson Laboratories California Institute of Technology Pasadena, California 91125, United States;

    Linde + Robinson Laboratories California Institute of Technology Pasadena, California 91125, United States;

    Linde + Robinson Laboratories California Institute of Technology Pasadena, California 91125, United States;

    Linde + Robinson Laboratories California Institute of Technology Pasadena, California 91125, United States;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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