等离子改性CNT/TiO2电极吸附去除水中苯酚的研究

施周1 杨文浩1 杨灵芳1 邓林1

(1.湖南大学水工程与科学系, 湖南长沙 410082)

【摘要】利用电感耦合空气等离子体对涂覆法制备的CNT/TiO2复合电极进行射频放电改性处理.复合电极的表面形貌、润湿性及元素成分分别通过扫描电镜(SEM)、接触角测试仪、x射线光电子能谱(XPS)进行了表征.结果表明,改性后有利于苯酚吸附,电极比表面孔隙、亲水性、TiO2及含氧官能团均得以增加;循环伏安测试(CV)表明改性后电极比电容提高54%;改性后复合电极对苯酚的吸附量较改性前提高了45%.且等离子改性CNT/TiO2电极对苯酚的去除量随电压、苯酚初始浓度的增加而增加,吸附过程符合准二级动力学方程,吸附等温线符合Langmuir等温吸附模型.

【关键词】 等离子活化; CNT/TiO_2复合电极; 苯酚; 电吸附;

【DOI】

【基金资助】 “十二五”国家科技支撑计划资助项目(2012BAJ24B03)

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This Article

ISSN:1000-6923

CN: 11-2201/X

Vol 35, No. 09, Pages 2664-2669

September 2015

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摘要

  • 1 实验部分
  • 2 结果与讨论
  • 3 结论
  • 参考文献