Acid-resisting covalent organic framework enabling high-efficiency palladium recovery from used palladium catalyst under strong acid

Guo, Liecheng; Zhang, Qingyun; Yu, Fengshan; Huang, Qing; Luo, Feng

doi:10.1016/j.cej.2024.150515

Chemical Engineering Journal

2024

DOI: 10.1016/j.cej.2024.150515

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Acid-resisting covalent organic framework enabling high-efficiency palladium recovery from used palladium catalyst under strong acid

Liecheng Guo,

Qingyun Zhang,

Fengshan Yu

et al.

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2024

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Cited by 3 publications

References 40 publications

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Covalent Organic Framework Nanoarchitectonics: Recent Advances for Precious Metal Recovery

Guo,

Liu,

Tao

et al. 2024

Advanced Materials

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The recovery of precious metals (PMs) from secondary resources has garnered significant attention due to environmental and economic considerations. Covalent organic frameworks (COFs) have emerged as promising adsorbents for this purpose, owing to their tunable pore size, facile functionalization, exceptional chemical stability, and large specific surface area. This review provides an overview of the latest research progress in utilizing COFs to recover PMs. Firstly, the design and synthesis strategies of chemically stable COF‐based materials, including pristine COFs, functionalized COFs, and COF‐based composites, are delineated. Furthermore, the application of COFs in the recovery of gold, silver, and platinum group elements is delved into, emphasizing their high adsorption capacity and selectivity as well as recycling ability. Additionally, various interaction mechanisms between COFs and PM ions are analyzed. Finally, the current challenges faced by COFs in the field of PM recovery are discussed, and potential directions for future development are proposed, including enhancing the recyclability and reusability of COF materials and realizing the high recovery of PMs from actual acidic wastewater. With the targeted development of COF‐based materials, the recovery of PMs can be realized more economically and efficiently in the future.

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Covalent Organic Framework Nanoarchitectonics: Recent Advances for Precious Metal Recovery

Guo,

Liu,

Tao

et al. 2024

Advanced Materials

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Utilizing Anionic-Pillared Metal-Organic frameworks for low carbon and efficient palladium recovery via constructing a waste-free cycle

Xiao,

Dong,

Shao

et al. 2024

Chemical Engineering Journal

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The Functionalized N-Rich Covalent Organic Framework for Palladium Removal from Nuclear Wastewater

Junli,

chen,

Wentao

et al. 2024

Langmuir

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Efficiently adsorbing Pd(II) from acidic radioactive waste liquid is crucial for ensuring the safety of the radioactive waste vitrification process and significantly alleviating the scarcity of precious metals. However, the stability and selectivity of most current adsorbents are limited, hindering their practical application under acidic conditions. To address these limitations, a covalent organic framework (DHTP-TPB COF) was prepared with a high nitrogen content, leveraging the high affinity of its soft ligand N with palladium to achieve high selectivity. This work demonstrated that DHTP-TPB COF exhibits rapid adsorption kinetics, with equilibrium achieved within 10 min. The framework also boasts a high adsorption capacity of 142.8 mg/g and impressive reusability in 1.0 M nitric acid. Moreover, the DHTP-TPB COF displays excellent selectivity for Pd(II), even in the presence of 13 interfering ions. By combining FT-IR, XPS spectroscopy, and DFT theoretical calculations, the dense N sites in the framework have a strong affinity for Pd(II), resulting in exceptional adsorption performance that was confirmed. The findings of this study highlight the potential of COFs with robust linkers and customized functional groups to effectively and selectively capture Pd(II) under harsh environmental conditions of high-level liquid waste.

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Acid-resisting covalent organic framework enabling high-efficiency palladium recovery from used palladium catalyst under strong acid

Cited by 3 publications

References 40 publications

Covalent Organic Framework Nanoarchitectonics: Recent Advances for Precious Metal Recovery

Covalent Organic Framework Nanoarchitectonics: Recent Advances for Precious Metal Recovery

Utilizing Anionic-Pillared Metal-Organic frameworks for low carbon and efficient palladium recovery via constructing a waste-free cycle

The Functionalized N-Rich Covalent Organic Framework for Palladium Removal from Nuclear Wastewater

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