Facile synthesis of hydroxylated triazine-based magnetic microporous organic network for ultrahigh adsorption of phenylurea herbicides: An experimental and density-functional theory study

• Published in: Journal of hazardous materials 2024-03, Vol.465, p.133468-133468, Article 133468
• Main Authors: Liu, Lu, Qiao, Lu-Qin, Liu, Feng, Sun, Qian-Yun, Zhao, Yan-Fang, Wang, Xiao-Li, Li, Na, Jiang, Hai-Long, Chen, Xiang-Feng, Wang, Ming-Lin, Wu, Yong-Ning, Zhao, Ru-Song
• Format: Article
• Language: English
• Subjects: Density−functional theory calculation; Hydroxylated triazine-enriched magnetic MON; Phenylurea herbicides; Room temperature, Magnetic solid−phase extraction
• ISSN: 0304-3894; 1873-3336
• DOI: 10.1016/j.jhazmat.2024.133468

Microporous organic networks (MONs) are highly porous materials that are particularly useful in analytical chemistry. However, the use of these materials is often limited by the functional groups available on their surface. Here, we described the polymerization of a sea urchin-like structure material at ambient temperature, that was functionalized with hydroxyl, carboxyl, and triazine groups and denoted as OH-COOH-MON-TEPT. A substantial proportion of OH-COOH-MON-TEPT was intricately decorated EDA-Fe3O4, creating a well-designed configuration (EDA-Fe3O4 @OH-COOH-MON-TEPT-EDC) for superior adsorption of the target analytes phenylurea herbicides (PUHs) via magnetic solid-phase extraction (MSPE). The proposed method showed remarkably low limits of detection ranging from 0.03 to 0.22 ng·L−1. Experimental investigations and theoretical analyses unveiled the adsorption mode between EDA-Fe3O4 @OH-COOH-MON-TEPT-EDC and PUHs. These findings establish a robust foundation for potential applications of EDA-Fe3O4 @OH-COOH-MON-TEPT-EDC in the analysis of various polar contaminants. [Display omitted] •Hydroxylated triazine-based magnetic MON was fabricated, suitable for MSPE of PUHs.•Triazine-modulated MON featured high SBET and ultrasensitive adsorption for PUHs.•Adsorption mechanism of PUHs on MON was certified by DFT, XPS and selectivity tests.•A reliable MSPE method was established for PUHs determination in complex matrix.