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

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Al-Hunaiti, A.; Mohaidat, Q.; Bsoul, I.; Mahmood, S.; Taher, D.; Hussein, T. Synthesis and Characterization of Novel Phyto-Mediated Catalyst, and Its Application for a Selective Oxidation of (VAL) into Vanillin under Visible Light. Catalysts 2020, 10, 839.

Title: Synthesis and Characterization of Novel Phyto-Mediated Catalyst, and Its Application for a Selective Oxidation of (VAL) into Vanillin under Visible Light
Author: Al-Hunaiti, Afnan; Mohaidat, Qassem; Bsoul, Ibrahim; Mahmood, Sami; Taher, Deeb; Hussein, Tareq
Publisher: Multidisciplinary Digital Publishing Institute
Date: 2020-07-24
URI: http://hdl.handle.net/10138/318205
Abstract: Here, we report an efficient and highly selective oxidation of lignin model substrate using phyto-mediated ZnFe<sub>2</sub>O<sub>4</sub> nanoparticle using <i>Boswellia carterii</i> 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<sup>&minus;1</sup> were obtained in the presence of H<sub>2</sub>O<sub>2</sub> and base. The cubic spinel nano-ZnFe<sub>2</sub>O<sub>4</sub> catalyst was characterized by powder-XRD, FESEM, HR-TEM and M&ouml;ssbauer 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.


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