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作者:

Duan, Pingzhou (Duan, Pingzhou.) | Gao, Shiheng (Gao, Shiheng.) | Li, Xiang (Li, Xiang.) | Sun, Zhirong (Sun, Zhirong.) (学者:孙治荣) | Hu, Xiang (Hu, Xiang.)

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EI Scopus SCIE

摘要:

Carbon nanotubes are extensively used in energy, catalysis and environmental fields because of large specific area and superior electrochemical performances. A novel CeO2-ZrO2/TiO2/CNT anode was fabricated through sol-gel method to improve electrochemical degradation efficiency towards trace pollutant in water environment, such as ceftazidime. Surface structure and elemental compositions were characterized by scanning electron microscopy, transmission electron microscopy, X-ray diffraction and X-ray photoelectron spectroscopy. A uniform and compact loading of CeO2-ZrO2 and TiO2 nanoparticles were observed which is regarded to be beneficial for stability and catalytic improvement. The optimal loading amount of TiO2 and CeO2-ZrO2 was decided by electrochemical performance and the results indicated addition of 6 mL tetrabutyl orthotitanate in 0.5 g CNT and 3.33% atomic ratio of CeO2/C resulted in a highest removal rate of 83.47% under 3 mA.cm(-2). Cyclic voltammograms, electrochemical impedance spectroscopy and hydroxyl generation test were conducted, demonstrating this anode displayed superior electrochemical properties with greater yield of center dot OH and lower charge transfer resistance. Moreover, kinetic parameters were optimized in this study, indicating an electrode distance of 2 cm and stirring rate of 400 rad.min(-1) were the optimal operation condition from the perspectives of energy consumption and degradation efficiency. Finally, the degradation intermediates and pathways are proposed with HPLC-MS.

关键词:

Carbon nanotubes Ceftazidime CeO2-ZrO2/TiO2/CNT Degradation pathway Electrochemical degradation Kinetic parameters

作者机构:

  • [ 1 ] [Duan, Pingzhou]Beijing Univ Chem Technol, Res Grp Water Pollut Control & Water Reclamat, Coll Chem Engn, Beijing 100029, Peoples R China
  • [ 2 ] [Gao, Shiheng]Beijing Univ Chem Technol, Res Grp Water Pollut Control & Water Reclamat, Coll Chem Engn, Beijing 100029, Peoples R China
  • [ 3 ] [Li, Xiang]Beijing Univ Chem Technol, Res Grp Water Pollut Control & Water Reclamat, Coll Chem Engn, Beijing 100029, Peoples R China
  • [ 4 ] [Hu, Xiang]Beijing Univ Chem Technol, Res Grp Water Pollut Control & Water Reclamat, Coll Chem Engn, Beijing 100029, Peoples R China
  • [ 5 ] [Sun, Zhirong]Beijing Univ Technol, Coll Environm & Energy Engn, Beijing 100124, Peoples R China

通讯作者信息:

  • [Hu, Xiang]Beijing Univ Chem Technol, 15 Beisanhuan East Rd, Beijing 100029, Peoples R China

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来源 :

JOURNAL OF ELECTROANALYTICAL CHEMISTRY

ISSN: 1572-6657

年份: 2019

卷: 841

页码: 10-20

4 . 5 0 0

JCR@2022

ESI学科: CHEMISTRY;

ESI高被引阀值:66

JCR分区:1

被引次数:

WoS核心集被引频次: 17

SCOPUS被引频次: 17

ESI高被引论文在榜: 0 展开所有

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