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<p>The ostrich egg shell membrane (OESM) was modified through UV-photografted polymerization using poly(allyl trimethyl ammonium iodide) (PATA) to create metal-free, stable, non-toxic, low-cost, biocompatible, and heterogeneous catalysts for the converting CO<sub>2</sub> into cyclic organic carbonates. The resulting modified membranes (OESM-PATA) were employed as catalysts for the production of high-efficiency terminal cyclic organic carbonates from epoxide and greenhouse CO<sub>2</sub>. Various factors affecting the reaction, including catalyst amount, carbon dioxide pressure, temperature, and reaction time, were investigated. The unique design of OESM-PATA facilitated the activation of CO<sub>2</sub> and epoxide under mild, solvent-free conditions, leading to outstanding conversion and selectivity rates exceeding 99% for different types of terminal epoxides. A proposed reaction mechanism highlighted the crucial role played by hydroxyl and amine groups on the catalyst surface in facilitating hydrogen bonding interactions between epoxides and hydroxyl groups. Furthermore, the catalyst demonstrated remarkable recyclability, with the capability to be reused three times without any significant loss in its catalytic activity. An inferred mechanism was suggested based on experimental findings to explain the observed results.</p>

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Safe and Green Modified Ostrich Eggshell Membranes as an Efficient Catalyst for CO2 Fixation with Epoxides

  • 期刊论文

  • 发表日期：

    2025年10月14日

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  • Amir Abdolmaleki,
  • Zahra Mohamadi,
  • Zahra Bazyar

摘要

The ostrich egg shell membrane (OESM) was modified through UV-photografted polymerization using poly(allyl trimethyl ammonium iodide) (PATA) to create metal-free, stable, non-toxic, low-cost, biocompatible, and heterogeneous catalysts for the converting CO2 into cyclic organic carbonates. The resulting modified membranes (OESM-PATA) were employed as catalysts for the production of high-efficiency terminal cyclic organic carbonates from epoxide and greenhouse CO2. Various factors affecting the reaction, including catalyst amount, carbon dioxide pressure, temperature, and reaction time, were investigated. The unique design of OESM-PATA facilitated the activation of CO2 and epoxide under mild, solvent-free conditions, leading to outstanding conversion and selectivity rates exceeding 99% for different types of terminal epoxides. A proposed reaction mechanism highlighted the crucial role played by hydroxyl and amine groups on the catalyst surface in facilitating hydrogen bonding interactions between epoxides and hydroxyl groups. Furthermore, the catalyst demonstrated remarkable recyclability, with the capability to be reused three times without any significant loss in its catalytic activity. An inferred mechanism was suggested based on experimental findings to explain the observed results.