Hydroxy-Containing Covalent Organic Framework Combined with Nickel Ferrite as a Platform for the Recognition and Capture of Bisphenols

Siyuan Di; Qiaozhen Wu; Chunxiang Shi; Shukui Zhu

doi:10.1021/acsami.2c17728

Hydroxy-Containing Covalent Organic Framework Combined with Nickel Ferrite as a Platform for the Recognition and Capture of Bisphenols

ACS Appl Mater Interfaces. 2023 Jan 11;15(1):1827-1842. doi: 10.1021/acsami.2c17728. Epub 2023 Jan 2.

Authors

Siyuan Di¹, Qiaozhen Wu¹, Chunxiang Shi¹, Shukui Zhu¹

Affiliation

¹ State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan430074, China.

PMID: 36594208
DOI: 10.1021/acsami.2c17728

Abstract

A hydroxy-containing covalent organic framework (COF) was successfully obtained via a simple nitrogen-purge synthetic procedure for the first time. The COF favored a serrated AA-stacking arrangement, which enhanced the stability compared with common AA or AB arrangements. To validate the potential of the COF in environmental applications, we decorated the COF onto NiFe₂O₄ and used the NiFe₂O₄@COF nanocomposite for magnetic solid-phase extraction of trace bisphenols (BPs). The parameters affecting extraction efficiencies were systematically optimized. Under the optimum extraction conditions, calibration plots showed good linearity (5.0-1.0 × 10³ ng mL^-1) for six BPs, and limits of detection varied from 0.14 to 0.73 ng mL^-1. Molecular polarity indexes and molecular dynamics simulations revealed why the COF could efficiently recognize and capture BPs. An adsorption mechanism related to the interaction between BP clusters and the COF was discovered. Ecotoxicological assessment of BPs further unraveled the significance of the developed method for the timely tracking of the concentration, distribution, and migration of BPs in environmental media.

Keywords: adsorption mechanism; bisphenols; covalent organic framework; ecotoxicological assessment; magnetic solid-phase extraction; serrated AA-stacking arrangement.