Publication Type Journal Article
Title ZnO nanoparticles: An efficient catalyst for transesterification reaction of alpha-keto carboxylic esters
Authors Mohamed M. A. Soliman Anirban Karmakar Elisabete C.B.A. Alegria Ana P. C. Ribeir Guilherme M. D. M. Rúbio Marta S. Saraiva M. Fátima C. Guedes da Silva Armando J.L. Pombeiro
Groups CCC
Year 2020
Month May
Volume 348
Number 0
Pages 72-79
Abstract Pure ZnO nanoparticles were synthesized by a sustainable precipitation method using zinc nitrate and sodium hydroxide in aqueous medium at room temperature. They were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM-EDX), thermogravimetric analysis (TGA), Fourier transform infrared spectroscopy (FTIR), ultraviolet-visible spectroscopy (UV-vis) spectroscopy and Brunauer-Emmett-Teller (BET) analysis. The XRD patterns indicate the formation of the hexagonal wurtzite phase with high purity and SEMEDS analysis confirm the purity and a homogenous distribution of the nanostructures. The ZnO nanostructures present plate-like agglomerates, resulting in a quasi-spherical morphology. The catalytic activity of the formed ZnO nanoparticles was evaluated towards the transesterification reaction of different carboxylic esters in the presence of various alcohols. This catalyst is highly selective for the transesterification of alpha-keto carboxylic ester (methyl benzoylformate) and leads to ca. 97\% of product yield within 24 h of reaction time.
Book Title
ISSN 0920-5861
EISSN 1873-4308
Conference Name
Bibtex ID ISI:000533564100010
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