Recycling e-waste into gold-loaded covalent organic framework catalysts for terminal alkyne carboxylation
Year: 2024
Type: article
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. The rising demand for gold requires innovative methods for its recovery from e-waste. Here, the authors describe tetrazine-linked covalent organic frameworks loaded with recovered gold from mixed metal e-waste which serve as efficient, reusable catalysts for CO2 carboxylation of alkynes.
Source: Nature Communications
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $6,790
Awards: G1134277896, G1321126357, G1647655023, G2415270547, G3631263731, Cornell Center for Materials Research - MRSEC, Dynamische 2D kovalente organische Gerüstverbindungen, G5917061246, G7767248047, MRI: Acquisition of a Cryogenic Probe and Modern Console for Outstanding NMR Sensitivity to Benefit Research and Education at Cornell University, G8389919011
OpenAlex ID: W4405894746