Issue 2, 2024

Palladium recovery from acidic solution with phenanthroline-based covalent organic polymers as adsorbents for efficient heterogeneous catalysis

Abstract

The selective recovery and utilization of Pd(II) from high-level liquid waste (HLLW) is highly desirable for both a flourishing circular economy and the sustainable development of nuclear energy. However, the design of suitable materials is an ongoing challenge due to the complicated composition and extremely radioactive and acidic conditions of HLLW, which requires exceptional selectivity and structural robustness of materials. In this study, two phenanthroline-based covalent organic polymers are constructed through polycondensation of 1,10-phenanthroline-2,9-dicarbaldehyde and 1,3,5-tris-(4-aminophenyl) triazine (COP-1) and subsequent oxidation of imine to amide groups (COP-2). COP-2 demonstrates a high adsorption capacity (318 mg g−1) and outstanding selectivity for Pd(II) over 17 competing cations at 3 M HNO3 and is stable at high acidity (2–6 M HNO3) and under a strong radiation field of up to 600 kGy γ irradiation. Additionally, COP-2 is reusable without an obvious decrease in adsorption efficiency after 5 cycles and is feasible for use in the dynamic column separation of Pd(II). More importantly, the Pd(II)-loaded COP-2 obtained from adsorption experiments can be employed as a highly efficient heterogeneous catalyst for Suzuki–Miyaura cross-coupling reactions with excellent reusability for more than 20 successive cycles. This work offers an example of turning wastes into wealth by rationally designing materials for precious metal recovery from HLLW and converting them into valuable catalysts.

Graphical abstract: Palladium recovery from acidic solution with phenanthroline-based covalent organic polymers as adsorbents for efficient heterogeneous catalysis

Supplementary files

Article information

Article type
Paper
Submitted
10 out 2023
Accepted
01 dez 2023
First published
04 dez 2023

Green Chem., 2024,26, 804-814

Palladium recovery from acidic solution with phenanthroline-based covalent organic polymers as adsorbents for efficient heterogeneous catalysis

H. Liu, P. Wu, K. Wang, Q. Li, C. Yu, X. Li, Y. Cai, W. Feng and L. Yuan, Green Chem., 2024, 26, 804 DOI: 10.1039/D3GC03851C

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements