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<p>The development of efficient and reusable supported catalysts is key to promoting eco-friendly catalytic processes in both research and industry. In this work, we present a bioengineered golden sponge catalyst, created by leveraging the natural metal-binding and reducing abilities of dried loofah (<i>Luffa aegyptiaca</i>) sponge. This sustainable, sponge-like catalyst can be easily cut into various sizes (up to 15 × 4 cm<sup>2</sup>), making it convenient for use, removal, and reuse. Thanks to its high absorptivity (~ 4.29&#xa0;mL/g) and open fibrous structure (~ 0.5 ± 0.1 cm<sup>2</sup>), a single piece of this catalyst can rapidly process up to 2 L of 4-nitrophenol solution (15&#xa0;mg/L), achieving a high reaction rate of 0.41&#xa0;min⁻<sup>1</sup>. The gold nanoparticles (AuNPs) are strongly anchored to the loofah fibers, combining with their natural mechanical strength to provide excellent chemical stability, efficient adsorption, and compatibility with real-time reaction monitoring and intermediate analysis. Even after use, the loofah's carbon-rich nature allows for effective gold recovery (~ 85.5 ± 8%) using Aqua Regia, making the system both cost-effective and sustainable. This study demonstrates the promise of natural, bio-derived materials as resilient, scalable, and hand-exchangeable catalysts for detoxifying harmful effluents.</p> Graphical abstract <p></p>

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In situ sustainable synthesis of gold supported microporous-hierarchical-scaffold for high-capacity hydrogenation and easy recovery

  • 期刊论文

  • 发表日期：

    2025年8月1日

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  • Jyothika Lingam,
  • Veda V. Dasari,
  • Chiranjeevi Korupalli,
  • Anil K. Suresh

摘要

The development of efficient and reusable supported catalysts is key to promoting eco-friendly catalytic processes in both research and industry. In this work, we present a bioengineered golden sponge catalyst, created by leveraging the natural metal-binding and reducing abilities of dried loofah (Luffa aegyptiaca) sponge. This sustainable, sponge-like catalyst can be easily cut into various sizes (up to 15 × 4 cm2), making it convenient for use, removal, and reuse. Thanks to its high absorptivity (~ 4.29 mL/g) and open fibrous structure (~ 0.5 ± 0.1 cm2), a single piece of this catalyst can rapidly process up to 2 L of 4-nitrophenol solution (15 mg/L), achieving a high reaction rate of 0.41 min⁻1. The gold nanoparticles (AuNPs) are strongly anchored to the loofah fibers, combining with their natural mechanical strength to provide excellent chemical stability, efficient adsorption, and compatibility with real-time reaction monitoring and intermediate analysis. Even after use, the loofah's carbon-rich nature allows for effective gold recovery (~ 85.5 ± 8%) using Aqua Regia, making the system both cost-effective and sustainable. This study demonstrates the promise of natural, bio-derived materials as resilient, scalable, and hand-exchangeable catalysts for detoxifying harmful effluents.

Graphical abstract