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Recycling e-waste into gold-loaded covalent organic framework catalysts for terminal alkyne carboxylation

Author

Listed:
  • Amin Zadehnazari

    (Stocking Hall)

  • Florian Auras

    (TUD Dresden University of Technology)

  • Ataf Ali Altaf

    (Stocking Hall)

  • Amin Zarei

    (Stocking Hall)

  • Ahmadreza Khosropour

    (Stocking Hall)

  • Saeed Amirjalayer

    (Wilhelm-Klemm-Straße 10)

  • Alireza Abbaspourrad

    (Stocking Hall)

Abstract

The rising demand for gold requires innovative methods for its recovery from e-waste. Here we present the synthesis of two tetrazine-based vinyl-linked covalent organic frameworks: TTF-COF and TPE-COF that adsorb gold ions and nanoparticles and catalyze the carboxylation of terminal alkynes. These covalent organic frameworks have low band gaps and high photocurrent responses. TTF-COF has an adsorption capacity toward aqueous Au(III) of 2440 mg g–1, and TPE-COF’s Au(III) adsorption capacity is 1639 mg g–1. The gold source is metal flakes isolated from waste computer processing units. Of the gold present, > 99% is selectively captured by TTF-COF whereas only 5% of the Ni and 2% of the Cu in the solution is adsorbed. The Au-loaded covalent organic frameworks catalyze the carboxylation of terminal alkynes and are stable and reusable for six reuse cycles. Our covalent organic frameworks convert e-waste into a valuable catalyst for a useful green organic transformation.

Suggested Citation

  • Amin Zadehnazari & Florian Auras & Ataf Ali Altaf & Amin Zarei & Ahmadreza Khosropour & Saeed Amirjalayer & Alireza Abbaspourrad, 2024. "Recycling e-waste into gold-loaded covalent organic framework catalysts for terminal alkyne carboxylation," Nature Communications, Nature, vol. 15(1), pages 1-17, December.
    • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-55156-3
    DOI: 10.1038/s41467-024-55156-3
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