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<p>This study presents a novel heterogeneous catalyst for the chemical fixation of carbon dioxide (CO<sub>2</sub>) into cyclic carbonates. A molybdenum (Mo) complex was successfully immobilized on silica-coated magnetic nanoparticles (Fe<sub>3</sub>O<sub>4</sub>@SiO<sub>2</sub>@APTMS), resulting in a highly efficient and reusable catalyst. Characterization techniques such as FT-IR, XRD, SEM, TGA, VSM, and EDS confirmed the successful synthesis and immobilization of the catalyst. The catalytic performance of Fe<sub>3</sub>O<sub>4</sub>@SiO<sub>2</sub>@APTMSMoO<sub>2</sub>L was evaluated in the coupling reaction between CO<sub>2</sub> and epichlorohydrin. Under optimized conditions (60 °C, 1 bar CO<sub>2</sub>, 10 mg catalyst, 6 h), the catalyst achieved a 96% conversion rate with excellent selectivity for the desired cyclic carbonate product. Notably, the catalyst exhibited remarkable stability and reusability, maintaining high catalytic activity for at least five consecutive cycles. Moreover, the complex demonstrated remarkably effective catalytic performance in the oxidation of glucose. This was achieved under benign conditions, specifically in an aqueous environment at ambient temperature, utilizing oxygen as the oxidizing agent. Notably, the conversion efficiency reached an impressive 95%.</p>

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Synthesis and characterization of a magnetically recoverable molybdenum catalyst for CO2 fixation and glucose oxidation

  • 期刊论文

  • 发表日期：

    2025年7月4日

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  • Hamid Zeighami Nejad,
  • Mehrji Khosravan,
  • Fatemeh Khajoee Nejad,
  • Hojatollah Khabazzadeh

摘要

This study presents a novel heterogeneous catalyst for the chemical fixation of carbon dioxide (CO2) into cyclic carbonates. A molybdenum (Mo) complex was successfully immobilized on silica-coated magnetic nanoparticles (Fe3O4@SiO2@APTMS), resulting in a highly efficient and reusable catalyst. Characterization techniques such as FT-IR, XRD, SEM, TGA, VSM, and EDS confirmed the successful synthesis and immobilization of the catalyst. The catalytic performance of Fe3O4@SiO2@APTMSMoO2L was evaluated in the coupling reaction between CO2 and epichlorohydrin. Under optimized conditions (60 °C, 1 bar CO2, 10 mg catalyst, 6 h), the catalyst achieved a 96% conversion rate with excellent selectivity for the desired cyclic carbonate product. Notably, the catalyst exhibited remarkable stability and reusability, maintaining high catalytic activity for at least five consecutive cycles. Moreover, the complex demonstrated remarkably effective catalytic performance in the oxidation of glucose. This was achieved under benign conditions, specifically in an aqueous environment at ambient temperature, utilizing oxygen as the oxidizing agent. Notably, the conversion efficiency reached an impressive 95%.