Get the latest tech news
Scientists extract gold from e-waste to transform CO2 into valuable chemicals | The team’s innovation recovers gold from discarded electronics and uses it as a catalyst to transform CO2 into useful organic materials.
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.
Fourier transform infrared (FT-IR), solid-state 13 C cross-polarization magic-angle spinning (CP-MAS) NMR, and X-ray photoelectron spectroscopy (XPS) were used to confirm the retention of the structural building blocks and the inclusion of the tetrathiafulvalene in TTF-COF and tetraphenylethylene in TPE-COF. The sorption experiments were conducted at pH 5, where the adsorption capacity for [AuCl 4] –1 is expected to be optimal based on the electrostatic interactions, the oxidation state of the gold ions stable, and the specific chemical environment maintainable by the COF materials. Used TTF-COF (30 mg) from the final adsorption-desorption cycle was added to 30 mL of the Au(III) solution and the mixture was stirred at room temperature for 20 min to allow any remaining gold ions to be adsorbed onto the COF.
Or read this on r/tech
