Single-step synthesis of prominently selective and easily regenerable POSS functionalized with high loadings of sulfur and carboxylic acids

Chaudhuri, Haribandhu; Lim, Che-Ryong; Yun, Yeoung-Sang

doi:10.1039/d3ta05202h

Cited by 7 publications

(2 citation statements)

References 45 publications

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“…(Figure 2, Table S1, Supporting Information). [21,[45][46][47][48][49][50][51][52][53][54][55][56][57][58][59][60][61] Typically, a lower surface area of an adsorbent could hinder adsorption performance by impeding the approach of dissolved metal ions to binding sites. However, in the case of these pyridine-based POPs for platinum adsorption, this drawback is mitigated.…”

Section: Platinum/palladium Sorption Studiesmentioning

confidence: 99%

Tailoring the Coordination Micro‐Environment in Nanotraps for Efficient Platinum/Palladium Separation

Song,

Verma,

Tan

et al. 2024

Advanced Materials

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Recovering platinum group metals from secondary resources is crucial to meet the growing demand for high‐tech applications. Various techniques have been explored, and adsorption using porous materials has emerged as a promising technology due to its efficient performance and environmental beingness. However, the challenge lies in effectively recovering and separating individual PGMs given their similar chemical properties. Herein, we present a breakthrough approach by sophisticatedly tailoring the coordination micro‐environment in a series of aminopyridine‐based porous organic polymers, which enables the creation of platinum‐specific nanotraps for efficient separation of binary PGMs (platinum/palladium). The newly synthesized POP‐o2NH2‐Py demonstrated record uptakes and selectivity towards platinum over palladium, with the amino groups adjacent to the pyridine moieties being vital in improving platinum binding performance. Further breakthrough experiments underlined its remarkable ability to separate platinum and palladium. Spectroscopic analysis reveals that POP‐o2NH2‐Py offers a more favorable coordination fashion to platinum ions compared to palladium ions owing to the greater interaction between N and Pt4+ and stronger intramolecular hydrogen bonding between the amino groups and four coordinating chlorines at platinum. These findings underscore the importance of fine‐tuning the coordination micro‐environment of nanotraps through subtle modifications that can greatly enhance the selectivity towards the desired metal ions.This article is protected by copyright. All rights reserved

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Section: Platinum/palladium Sorption Studiesmentioning

confidence: 99%

Tailoring the Coordination Micro‐Environment in Nanotraps for Efficient Platinum/Palladium Separation

Song,

Verma,

Tan

et al. 2024

Advanced Materials

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“…Various methods have been explored for the removal of heavy metal ions 14–16 especially radionuclides (such as uranium, thorium, etc. ) from aqueous solutions, including membrane separation, 17 chemical precipitation, 18 extraction, 19 and adsorption.…”

Section: Introductionmentioning

confidence: 99%

Highly efficient adsorption of thorium(iv) from aqueous solutions by functionalized UiO-66 with abundant phosphonic acid active sites

Yan,

Peng,

Peng

et al. 2024

New J. Chem.

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Thiol-functionalized cellulose adsorbents for highly selective separation of palladium over platinum in acidic aqueous solutions

Zhang,

MacDonald,

Raj

et al. 2024

Chemical Engineering Journal

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Single-step synthesis of prominently selective and easily regenerable POSS functionalized with high loadings of sulfur and carboxylic acids

Abstract: The growing demand for platinum group metals (PGMs) such as platinum (Pt) and palladium (Pd) necessitates novel approaches for efficient and selective separation and regeneration.

Cited by 7 publications

References 45 publications

Tailoring the Coordination Micro‐Environment in Nanotraps for Efficient Platinum/Palladium Separation

Tailoring the Coordination Micro‐Environment in Nanotraps for Efficient Platinum/Palladium Separation

Highly efficient adsorption of thorium(iv) from aqueous solutions by functionalized UiO-66 with abundant phosphonic acid active sites

Thiol-functionalized cellulose adsorbents for highly selective separation of palladium over platinum in acidic aqueous solutions

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