Calcined CoAl-layered double hydroxide as a heterogeneous catalyst for the degradation of acetaminophen and rhodamine B: activity, stability, and mechanism

  • Jianyao Zhu
  • Zhiliang ZhuEmail author
  • Hua Zhang
  • Hongtao Lu
  • Yanling Qiu
Research Article


Peroxymonosulfate (PMS) activated by nanomaterials presents one of the most promising strategies to generate reactive species for remediation of organic pollutant–contaminated water. In this study, CoAl-layered double hydroxide (CoAl-LDH) and calcined CoAl-LDH (CoAl-CLDH) were employed as catalysts for PMS activation towards aqueous organic pollutants degradation. Our experiments showed that the leaching of metal ions from catalyst can be significantly mediated by calcination treatment, which can avoid the secondary contamination. The stable CoAl-CLDH exhibited a high catalytic activity, which is comparable to that of the unstable CoAl-LDH. Importantly, reactive species quenching and electron paramagnetic resonance (EPR) results revealed that singlet oxygen (1O2) is the dominant reactive species and plays a crucial role in the catalytic oxidation process in CoAl-CLDH/PMS system. A possible mechanism was proposed for the activation of PMS on the CoAl-CLDH. We demonstrate that CoAl-CLDH is a highly active and stable heterogeneous catalyst for efficient catalytic oxidation of organic pollutants (such as acetaminophen and rhodamine B (RhB)) via activation of PMS.


Calcined CoAl-layered double hydroxide Peroxymonosulfate Degradation Organic pollutants Singlet oxygen 


Funding information

This work was supported by the National Science and Technology Major Project of China (Grant No. 2017ZX07201005) and the Foundation of Key Laboratory of Yangtze River Water Environment, Ministry of Education (Tongji University), China, (YRWEF201904).

Supplementary material

11356_2019_6390_MOESM1_ESM.docx (1.8 mb)
ESM 1 (DOCX 1875 kb)


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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.State Key Laboratory of Pollution Control and Resource ReuseTongji UniversityShanghaiChina
  2. 2.Shanghai Institute of Pollution Control and Ecological SecurityShanghaiChina
  3. 3.Shanghai Urban Construction Vocational CollegeShanghaiChina
  4. 4.Key Laboratory of Yangtze River Water Environment, Ministry of EducationTongji UniversityShanghaiChina

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