SCI和EI收录∣中国化工学会会刊

中国化学工程学报 ›› 2020, Vol. 28 ›› Issue (1): 318-327.DOI: 10.1016/j.cjche.2019.05.001

• Materials and Product Engineering • 上一篇    

Enhanced degradation of reactive dyes using a novel carbon ceramic electrode based on copper nanoparticles and multiwall carbon nanotubes

Fatemeh Jafari, Navid Nasirizadeh, Mohammad Mirjalili   

  1. Department of Textile and Polymer Engineering, Yazd Branch, Islamic Azad University, Yazd, Iran
  • 收稿日期:2018-11-26 修回日期:2019-03-31 出版日期:2020-01-28 发布日期:2020-03-31
  • 通讯作者: Navid Nasirizadeh

Enhanced degradation of reactive dyes using a novel carbon ceramic electrode based on copper nanoparticles and multiwall carbon nanotubes

Fatemeh Jafari, Navid Nasirizadeh, Mohammad Mirjalili   

  1. Department of Textile and Polymer Engineering, Yazd Branch, Islamic Azad University, Yazd, Iran
  • Received:2018-11-26 Revised:2019-03-31 Online:2020-01-28 Published:2020-03-31
  • Contact: Navid Nasirizadeh

摘要: A novel carbon ceramic electrode consisting of CuNPs and MWCNT was developed to treat reactive orange 84 (RO84) wastewater using ultrasound-assisted electrochemical degradation. The proposed electrode generated more hydroxyl radicals than non-nanoparticle electrodes did. In addition, a new electrochemical sensor was applied to determine residue RO84 in an aqueous medium during discoloration. This sensor is based on a glassy carbon electrode modified with gold nanourchins and graphene oxide and can detect RO84 concentration in the range of 1.0-1200 μmol·L-1 with the detection limit of 0.03 μmol·L-1. The degradation effects of the modified electrode on RO84 were evaluated systematically with different initial pH values, time durations, and amounts of CuNPs and MWCNT. The results suggested that the removal efficiency of RO84 was approximately 83% after 120 min of electrolysis in a phosphate buffer with pH 8.0 using a carbon ceramic electrode made with 4.0 wt% CuNPs and 4.0 wt% MWCNT. The possible mechanism of RO84 degradation was monitored by gas chromatography-mass spectrometry, and degradation pathways were proposed.

关键词: Electrochemical degradation, Carbon ceramic nanocomposite, Reactive dye, Copper nanoparticles

Abstract: A novel carbon ceramic electrode consisting of CuNPs and MWCNT was developed to treat reactive orange 84 (RO84) wastewater using ultrasound-assisted electrochemical degradation. The proposed electrode generated more hydroxyl radicals than non-nanoparticle electrodes did. In addition, a new electrochemical sensor was applied to determine residue RO84 in an aqueous medium during discoloration. This sensor is based on a glassy carbon electrode modified with gold nanourchins and graphene oxide and can detect RO84 concentration in the range of 1.0-1200 μmol·L-1 with the detection limit of 0.03 μmol·L-1. The degradation effects of the modified electrode on RO84 were evaluated systematically with different initial pH values, time durations, and amounts of CuNPs and MWCNT. The results suggested that the removal efficiency of RO84 was approximately 83% after 120 min of electrolysis in a phosphate buffer with pH 8.0 using a carbon ceramic electrode made with 4.0 wt% CuNPs and 4.0 wt% MWCNT. The possible mechanism of RO84 degradation was monitored by gas chromatography-mass spectrometry, and degradation pathways were proposed.

Key words: Electrochemical degradation, Carbon ceramic nanocomposite, Reactive dye, Copper nanoparticles