Co–Cu–Al Layered Double Oxides as Heterogeneous Catalyst for Enhanced Degradation of Organic Pollutants in Wastewater by Activating Peroxymonosulfate: Performance and Synergistic Effect

  • Liang Luo
    Liang Luo
    School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
    More by Liang Luo
  • Yongli Wang
    Yongli Wang
    School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
    Co-Innovation Center of Chemical Science and Engineering, Tianjin 300072, China
    More by Yongli Wang
  • Manli Zhu
    Manli Zhu
    School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
    More by Manli Zhu
  • Xiaowei Cheng
    Xiaowei Cheng
    School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
  • Xuling Zhang
    Xuling Zhang
    School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
    More by Xuling Zhang
  • Xianze Meng
    Xianze Meng
    School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
    More by Xianze Meng
  • Xin Huang
    Xin Huang
    School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
    Co-Innovation Center of Chemical Science and Engineering, Tianjin 300072, China
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  • , and 
  • Hongxun Hao*
    Hongxun Hao
    School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
    Co-Innovation Center of Chemical Science and Engineering, Tianjin 300072, China
    *E-mail: [email protected]. Tel.: 86-22-27405754. Fax: +86-22-27374971.
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Cite this: Ind. Eng. Chem. Res. 2019, 58, 20, 8699–8711
Publication Date (Web):April 30, 2019
https://doi.org/10.1021/acs.iecr.9b00167
Copyright © 2019 American Chemical Society
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Abstract

In order to exploit Co–Cu synergistic effect to develop catalyst with high activity, CoCuAl-layered double oxides was synthesized from CoCuAl-layered double hydroxides. The prepared CoCuAl-LDOs possessed high purity, uniform morphology, and a large special surface area (103.8 m2/g). CoCuAl-LDOs is an efficient catalyst for activating peroxymonosulfate (PMS) to degrade organic pollutants. Acid orange 7 (AO7, 20 mg/L) can be completely degraded within 30 min using 0.1 g/L CoCuAl-LDOs and 0.1 g/L PMS. The CoCuAl-LDOs/PMS system also exhibited good performance over a wide pH range. SO4•– was identified as the main reactive species responsible for pollutant degradation. More importantly, the structure–property relationship was investigated by H2-TPR and XPS. It was found that the high performance of CoCuAl-LDOs is attributed to the Co–Cu synergistic effect which can accelerate the redox cycle of Co2+/Co3+. This study sheds light on the Co–Cu synergistic effect for developing catalyst with high performance toward activating PMS in environmental remediation.

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The Supporting Information is available free of charge on the ACS Publications website at DOI: 10.1021/acs.iecr.9b00167.

  • Details of AO7 Degradation pathway analysis; EDX of CoCuAl-LDOs; TG-DSC of CoCuAl-LDHs; influence of temperature on AO7 degradation; reaction rate constants of AO7 degradation under different temperatures; XRD pattern of [email protected]; degradation of AO7 in [email protected] system; reusability of CoCuAl-LDOs; UV–vis spectra changes during AO7 degradation; reaction rate constants in radicals quenching experiments; table of reaction intermediates of AO7 degradation; GC peak and MS spectra of intermediates (PDF)

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This article is cited by 7 publications.

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