Synthesis and Characterization of Novel Phyto-Mediated Catalyst, and Its Application for a Selective Oxidation of (VAL) into Vanillin under Visible Light

Catalysts

Afnan Al-Hunaiti¹  Deeb Taher¹  Ibrahim Bsoul²  Tareq Hussein³  Sami Mahmood³  Qassem Mohaidat⁴ 

[1] Department of Chemistry, The University of Jordan, Amman 11942, Jordan;Department of Physics, Al al-Bayt University, Mafraq 13040, Jordan;Department of Physics, The University of Jordan, Amman 11942, Jordan;Department of Physics, Yarmouk University, Irbid 21163, Jordan;

关键词: lignin;    hydrogen peroxide;    vanillyl alcohol;    oxidation;    nanoparticle;    green catalyst;   

DOI  :  10.3390/catal10080839

来源: DOAJ

【 摘 要 】

Here, we report an efficient and highly selective oxidation of lignin model substrate using phyto-mediated ZnFe₂O₄ nanoparticle using Boswellia carterii extract. The nanocatalyst with an average size of 8 nm showed excellent photocatalytic activity of the synthesized carbonyl containing products under visible light irradiation. The catalytic activity and selectivity towards oxidation of vanillyl alcohol to vanillin with selectivity up to 99% at conversion over 98% and turn-over frequency values up to 1600 h⁻¹ were obtained in the presence of H₂O₂ and base. The cubic spinel nano-ZnFe₂O₄ catalyst was characterized by powder-XRD, FESEM, HR-TEM and Mössbauer analysis. The demonstrated catalyst was robust and stable under the reaction conditions. Furthermore, it was easy to be separated from the reaction mixture and be reused for subsequent reactions up to 5 times without significant reactivity or selectivity loss.

【 授权许可】

Unknown