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A facile ultrasound-assisted synthesis of mesoporous carbon

  • Carbon Letters
  • Abbr : Carbon Lett.
  • 2023, 33(1), pp.177-190
  • DOI : 10.1007/s42823-022-00415-w
  • Publisher : Korean Carbon Society
  • Research Area : Natural Science > Natural Science General > Other Natural Sciences General
  • Received : July 17, 2022
  • Accepted : September 28, 2022
  • Published : February 1, 2023

Araujo Rayanne O. 1 Santos Vanuza O. 1 Santos Jamily L. 1 Ribeiro Flaviana C. P. 1 Costa Maria J. F. 2 Chaar Jamal S. 1 Falcão Newton P. S. 3 da Costa Carlos E. F. 4 de Souza Luiz K. C. 1

1Department of Chemistry, Federal University of Amazonas, Manaus, AM, Brazil
2School of Engineering of Sao Carlos, Department of Materials Engineering, University of Sao Paulo, Sao Carlos, SP, Brazil
3Coordination of Technology and Innovation, National Institute for Amazon Research, Manaus, AM, Brazil
4Department of Chemistry, Federal University of Para, Belem, PA, Brazil

Accredited

ABSTRACT

The ultrasonic method is an alternative to the conventional route to produce structured carbon materials, offering the advantages of synthesis in a short period of time under room temperature. The main objective of this work is to synthesize a sulfonated mesoporous carbon catalyst from a phenolic resin composed of phloroglucinol and formaldehyde. The synthesis was performed by the soft-template method in an ultrasonic processor and the product was subsequently carbonized and sulfonated for application in the esterification model reaction. Functionalization with sulfuric acid of MCS5-6 h sample brought about a decrease in porosity but simultaneously resulted in the generation of functional groups of an acidic nature. The MCS5-6 h catalyst with a sulfonic density of 1.6 mmol g−1, surface area of 402 m2 g−1 and pore diameter of 10.6 nm maintained in mesoporous even after acid treatment. MCS5-6 h showed excellent activity in the esterification reaction with 95% oleic acid conversion. The recyclability of MCS5-6 h was satisfactory during five reaction cycles. The present work addressed a promising alternative for the synthesis of carbon catalysts using ultrasound irradiation, thus providing an alternative with a lower cost of time and energy for large-scale production.

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