• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Electrocatalysis >Electrochemical Degradation of an Anthraquinonic Dye on an Expanded Graphite-Diamond Composite Electrode
【24h】

Electrochemical Degradation of an Anthraquinonic Dye on an Expanded Graphite-Diamond Composite Electrode

机译：膨胀石墨-金刚石复合电极上蒽醌染料的电化学降解

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

In recent times, there has been increasing interest in the exploration of electrochemical approaches for the destruction of organic pollutants in wastewater owing to their ability to degrade recalcitrant pollutants in our water. This work demonstrated the use of expanded graphite-diamond anode for the degradation of acid blue 40 (AB 40) dye. Expanded graphite (EG) and expanded graphite-diamond (EG-diamond) electrodes were prepared and characterised using Raman spectrometry, x-ray diffraction, scanning electron microscopy and cyclic voltammetry. The electrolysis of the analyte in 0.1 M Na2SO4 electrolyte resulted in ca. 80 % dye removal at the EG-diamond electrode and 66 % removal at the pristine EG electrode at a current density of 20 mAcm(-2) after 4 h. However, in a chlorine-mediated electrolysis (NaCl as supporting electrolyte), the decolourisation of the dye was very rapid with over 98 % decolourisation in 25 min. The extent of mineralisation was measured by total organic carbon (TOC). EG-diamond and EG electrodes yielded TOC removal of 44 and 26 % respectively in the sodium sulphate supported cell. The degradation of AB 40 follows a pseudo first-order kinetic model with apparent rate constants of 2.34 x 10(-3) min(-1) and 4.41 x 10(-3) min(-1) obtained at EG and EG-diamond electrodes, respectively. The EG-diamond electrode was further applied in the degradation of orange II dye (OG II) and a mixture of OG II and AB 40 with a TOC removal of 49 % for the dye mixture.
机译：近年来，由于能够降解水中难降解污染物的能力，人们对电化学方法销毁废水中有机污染物的兴趣日益浓厚。这项工作证明了使用膨胀石墨金刚石阳极来降解酸性蓝40（AB 40）染料。制备膨胀石墨（EG）和膨胀石墨-金刚石（EG-金刚石）电极，并使用拉曼光谱，X射线衍射，扫描电子显微镜和循环伏安法进行表征。在0.1 M Na2SO4电解质中分析物的电解导致4小时后，在20 mAcm（-2）的电流密度下，EG金刚石电极上的染料去除80％，原始EG电极上的染料去除66％。但是，在氯介导的电解中（NaCl作为支持电解质），染料的脱色非常迅速，在25分钟内脱色率超过98％。矿化程度通过总有机碳（TOC）进行测量。 EG金刚石电极和EG电极在硫酸钠支持的电池中的TOC去除率分别为44％和26％。 AB 40的降解遵循伪一级动力学模型，在EG和EG金刚石上获得的表观速率常数为2.34 x 10（-3）min（-1）和4.41 x 10（-3）min（-1）。电极。将EG金刚石电极进一步用于降解橙色II染料（OG II）以及OG II和AB 40的混合物，该染料混合物的TOC去除率为49％。

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