The Built-in Phenyl Bridging Switch Enhances the Oil-Water Separation Performance of Porous Aromatic Framework Material

doi:10.7503/cjcu20250074

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The Built-in Phenyl Bridging Switch Enhances the Oil-Water Separation Performance of Porous Aromatic Framework Material

MA Shuo^1,2, CHEN Shixin^1,2, XIA Chunlong³, ZHOU Hongfei³, LI Cong³, BAI Weihua⁴, CUI Bo⁵, ZHENG Guiyue⁵, BU Naishun^1,2, HE Zhe^1,2

1.Institute of Forensic Institution, Liaoning University 2.College of Environment, Liaoning University 3.Fushun Hydrological Bureau of Liaoning Province 4.Liaoning River and Reservoir Management Service Center 5.College of Chemistry, Liaoning University

Received:2025-03-17 Revised:2025-06-18 Online First:2025-06-20 Published:2025-06-20
Contact: Nai-Shun BU E-mail:bunaishun@lnu.edu.cn
Supported by:
Supported by the National Natural Science Foundation of China(No.31972522), the Fushun Water Affairs Bureau Government Service Project (No.JH24-210400-00444), the Liaoning Provincial Department of Education Basic Scientific Research Project for Universities, the Shenyang Science and Technology Bureau Social Governance Science and Technology Special Project, the Liaoning University Fundamental Research Program, the Liaoning University Undergraduate Innovation and Entrepreneurship Training Program

Abstract

Abstract: Superhydrophobic porous aromatic framework materials have demonstrated remarkable potential in efficiently achieving oil-water separation, thereby holding great promise for their application in treating oilfield wastewater. The robust capillary action within their microcavities has been verified to serve as an effective containment mechanism. Nevertheless, the relatively constricted pore space poses a limitation on their adsorption capacity. In this research endeavor, by ingeniously incorporating additional phenyl fragments as bridging switches (π-π cross-linking bridges) into the carbazole-based porous aromatic framework, we successfully synthesized a novel superhydrophobic porous aromatic material, denoted as LNU-42, and significantly enlarged its pore size. Experimental results reveal that, in contrast to the carbazole-based superhydrophobic porous aromatic material LNU-40, which lacks the phenyl-bridge switches, the introduction of these built-in phenyl-bridging switches has led to a 6-8-fold expansion in the pore size of LNU-42. This substantial increase has notably augmented the accommodation space for organic solvents. Specifically, the fabric impregnated with LNU-42 exhibits an outstanding adsorption capacity for chlorobenzene, reaching up to 7.8 times its own weight, representing a 66% enhancement in adsorption performance. Moreover, the separation efficiency of LNU-42 for organic solvents such as chlorobenzene and carbon tetrachloride surpasses 90%. Notably, LNU-42 demonstrates remarkable stability, maintaining its strong hydrophobicity even under extremely harsh environmental conditions, including strong acid/alkali (1 mol L?1) and high-salt concentration (1 mol L?1). This study not only furnishes a viable technical approach for the fabrication of superhydrophobic materials with high-efficiency oil-water separation capabilities but also offers crucial scientific and technological underpinnings for the treatment of oilfield wastewater.

Key words: Superhydrophobic porous aromatic framework materials, Built-in phenyl bridging switch, Suzuki reaction, Oil-water separation performance

CLC Number:

O631

TrendMD:

MA Shuo, CHEN Shixin, XIA Chunlong, ZHOU Hongfei, LI Cong, BAI Weihua, CUI Bo, ZHENG Guiyue, BU Naishun, HE Zhe. The Built-in Phenyl Bridging Switch Enhances the Oil-Water Separation Performance of Porous Aromatic Framework Material[J]. Chem. J. Chinese Universities, doi: 10.7503/cjcu20250074.

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The Built-in Phenyl Bridging Switch Enhances the Oil-Water Separation Performance of Porous Aromatic Framework Material

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