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Porous polyisothiocyanurates for selective palladium recovery and heterogeneous catalysis

DOKPE

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  • 2022
Published in:
  • Chem. - 2022, vol. 8, p. 1-17
English Palladium is an indispensable metal due to its wide range of industrial applications. Pd refining, however, is an extremely energy-intensive process with a serious environmental impact. Thus, the selective recovery of Pd from secondary sources is rather important. In this direction, solid sorbents are promising candidates owing to their reusability. Here, we report the synthesis of porous polyisothiocyanurates through the trimerization of 1,4-phenyldiisothiocyanate under ionothermal conditions, named covalent isothiocyanurate frameworks (CITCFs), bearing in situgenerated thiourea moieties as binding sites for Pd. High surface area of CICTFs, 1,589 m2 g−1, along with the presence of abundant sulfur atoms within a hierarchically porous network, enabled an exceptional Pd(II) uptake capacity of 909 mg g−1, fast adsorption kinetics, stable uptake over a wide pH range, and selective Pd(II) recovery from wastewater conditions. Moreover, the reduction of recovered Pd(II) within the polymer network led to highly efficient heterogeneous catalysis for the Suzuki-Miyaura cross-coupling reaction.
Faculty
Faculté des sciences et de médecine
Department
Département de Chimie
Language
  • English
Classification
Chemistry
License
CC BY
Identifiers
Persistent URL
https://folia.unifr.ch/unifr/documents/320424
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