标题: Highly Efficient, Recyclable Microplastic Adsorption Enabled by Chitin Hydrogen Bond Network Rearrangement

作者: Wu, Y (Wu, Yang); Ye, CH (Ye, Chenghao); Liu, FT (Liu, Fangtian); Gu, XK (Gu, Xiangkui); Yu, L (Yu, Le); Shi, XW (Shi, Xiaowen); Du, YM (Du, Yumin); Ding, MY (Ding, Mingyue); Chen, CJ (Chen, Chaoji); Deng, HB (Deng, Hongbing)

来源出版物: ADVANCED FUNCTIONAL MATERIALS  DOI: 10.1002/adfm.202311075  Early Access Date: MAY 2024  Published Date: 2024 MAY 6  

摘要: A sustainable strategy based on chitin from waste seafood is proposed to remove nano-size microplastics in water. A chitin nanofibrous foam is constructed by a new hydrogen bond rearrangement scheme without any crosslinking, which delivers an impressive high adsorption capacity of 411.14 +/- 1.50 mg g(-1) for small-sized (< 1 <mu>m) microplastics. This excellent adsorption capacity stems from the rough fibrous surface structure of the highly porous foam, the positively charged nature of the partially deacetylated chitin and other molecular interactions introduced by the activation and increased exposure of -OH, -NH2 and -NHCO- groups. Molecular dynamics simulation further demonstrates that C-H-pi, O-H-pi, and C = O-pi interactions between the microplastics and chitin foam facilitates the efficient removal of microplastics. A high removal efficiency is maintained even in salty water, a property that exemplifies good adaptability to various water bodies. Finally, two proof-of-principle scenarios are presented for converting the recovered microplastics into value-added products. Thus, the entire cycling strategy represents a powerful remedy for the urgent yet challenging ocean microplastic pollution problem.

作者关键词: biomass; chitin; environmental remediation; hydrogen bond; microplastic

地址: [Wu, Yang; Liu, Fangtian; Yu, Le; Shi, Xiaowen; Du, Yumin; Chen, Chaoji; Deng, Hongbing] Wuhan Univ, Sch Resource & Environm Sci, Key Lab Biomass Resource Chem & Environm Biotechno, Hubei Int Sci & Technol Cooperat Base Sustainable, Wuhan 430079, Peoples R China.

[Ye, Chenghao; Gu, Xiangkui; Ding, Mingyue] Wuhan Univ, Sch Power & Mech Engn, Wuhan 430072, Peoples R China.

通讯作者地址: Chen, CJ; Deng, HB (通讯作者)，Wuhan Univ, Sch Resource & Environm Sci, Key Lab Biomass Resource Chem & Environm Biotechno, Hubei Int Sci & Technol Cooperat Base Sustainable, Wuhan 430079, Peoples R China.

电子邮件地址: chenchaojili@whu.edu.cn; hbdeng@whu.edu.cn

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