A facile ultrasound‑assisted synthesis of mesoporous carbon

서지정보

ㆍ발행기관 : 한국탄소학회 ㆍ수록지정보 : Carbon letters / 33권 / 1호
ㆍ저자명 : Rayanne O. Araujo, Vanuza O. Santos, Jamily L. Santos, Flaviana C. P. Ribeiro, Maria J. F. Costa, Jamal S. Chaar, Newton P. S. Falcão, Carlos E. F. da Costa, Luiz K. C. de Souza

목차

Abstract
1 Introduction
2 Experimental
2.1 Synthesis of functionalized mesoporous carbon
2.2 Characterization of functionalized mesoporous carbon
2.3 Application of the catalyst in an acid catalyzed reaction
3 Results and discussion
3.1 Influence of ultrasound amplitude and time on mesoporous carbon preparation
3.2 Influence of sulfonation time on mesoporous carbon preparation
3.3 Optimized conditions for the conversion of oleic acid to methyl ester
4 Conclusion
Acknowledgements
References

영어 초록

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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