Citation: Sheng Guo, Huiling Tang, Liming You, Huali Zhang, Jun Li, Kun Zhou. Combustion synthesis of mesoporous CoAl₂O₄ for peroxymonosulfate activation to degrade organic pollutants[J]. Chinese Chemical Letters, ;2021, 32(9): 2828-2832. doi: 10.1016/j.cclet.2021.01.019 shu

Combustion synthesis of mesoporous CoAl₂O₄ for peroxymonosulfate activation to degrade organic pollutants

Sheng Guo ^{a, b, c, *,} ,
Huiling Tang ^{a, d} ,
Liming You ^b ,
Huali Zhang ^a ,
Jun Li ^e ,
Kun Zhou ^{b, c, **,}

a.
School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan 430205, China
b.
Environmental Process Modelling Centre, Nanyang Environment and Water Research Institute, Nanyang Technological University, Singapore 637141, Singapore
c.
School of Mechanical and Aerospace Engineering, Nanyang Technological University, Singapore 639798, Singapore
d.
Department of Environmental Science and Engineering, Wuhan University, Wuhan 430079, China
e.
Henan Institute of Advanced Technology, Zhengzhou University, Zhengzhou 450052, China

^**

guoshengwit@163.com

kzhou@ntu.edu.sg

Received Date: 21 October 2020
Revised Date: 7 December 2020
Accepted Date: 12 January 2021
Available Online: 16 January 2021

Figures(3)

A mesoporous cobalt aluminate (CoAl₂O₄) spinel is synthesized through a combustion method and adopted for the activation of peroxymonosulfate (PMS) to degrade organic pollutants. Multiple characterization procedures are conducted to investigate the morphology and physicochemical properties of the CoAl₂O₄ spinel. Due to its mesoporous structure, large surface area, and high electrical conductivity, the obtained CoAl₂O₄ exhibits remarkable catalytic activity for Rhodamine B (RhB) degradation. Its RhB degradation rate is 89.0 and 10.5 times greater than those of Co₃O₄ and CoAl₂O₄ spinel prepared by a precipitation method, respectively. Moreover, the mesoporous CoAl₂O₄ spinel demonstrates a broad operating pH range and excellent recyclability. The influence of several parameters (catalyst amount, PMS concentration, initial pH, and coexisting inorganic anions) on the oxidation of RhB is evaluated. Through quenching tests and electron paramagnetic resonance experiments, sulfate radicals are identified as the predominant reactive species in RhB degradation. This paper provides new insights for the development of efficient, stable, and reusable cobalt-based heterogeneous catalysts and promotes the application of persulfate activation technology for the treatment of refractory organic wastewater.
- CoAl₂O₄,
- Combustion synthesis,
- Peroxymonosulfate,
- Sulfate radical,
- Advanced oxidation process
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Combustion synthesis of mesoporous CoAl₂O₄ for peroxymonosulfate activation to degrade organic pollutants