Trace solvents-assisted mechanochemistry of waste poly(ethylene terephthalate) into MIL-53Al for efficient hydroelectricity generation

IF 13.2 1区工程技术 Q1 ENGINEERING, CHEMICAL

Chemical Engineering Journal Pub Date : 2025-05-17 DOI:10.1016/j.cej.2025.163895

Yan She, Weikang Han, Huajian Liu, Guixin Hu, Huiyue Wang, Xueying Wen, Lijie Liu, Lingling Feng, Xinyao Zhang, Jiang Gong

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Abstract

Upcycling of waste poly(ethylene terephthalate) (PET) into metal–organic framework (MOF) has emerged as a new approach for the low-cost, sustainable synthesis of MOF. However, previous strategies suffer from high pressure/temperature, huge amounts of organic solvents, and/or low crystalline structure/specific surface area of MOF. Herein, we report the trace solvent-assisted two-step ball milling strategy to convert waste PET into MIL-53Al with high specific surface area. The type and dosage of organic solvents are key for the growth of MIL-53Al. N,N-dimethylformamide not only acts as a good molecular template during the ball milling process to improve the crystalline structure of MIL-53Al, but also stabilizes the framework structure of MIL-53Al to enhance the specific surface area (590 m² g⁻¹). Furthermore, the MIL-53Al-based hydroelectric generator achieves high output voltage (270 mV), thus ranking as one of most efficient generators. Molecular dynamics simulation shows that the nanochannels in the device are ion-selective, resulting in the faster migration of Cl⁻ than Na⁺. This work presents a new opportunity for the massive, green production of MOF from waste polyesters and contributes to the development of advanced hydroelectric generators.

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微量溶剂辅助下废聚对苯二甲酸乙酯转化为MIL-53Al的高效水力发电

将废弃的聚对苯二甲酸乙酯（PET）升级为金属有机骨架（MOF）是一种低成本、可持续合成金属有机骨架的新方法。然而，以前的策略受到高压/温度、大量有机溶剂和/或低晶体结构/ MOF比表面积的影响。在此，我们报告了微量溶剂辅助的两步球磨策略，将废PET转化为具有高比表面积的MIL-53Al。有机溶剂的种类和用量是影响MIL-53Al生长的关键因素。N，N-二甲基甲酰胺不仅在球磨过程中作为良好的分子模板，改善了MIL-53Al的晶体结构，而且稳定了MIL-53Al的框架结构，提高了MIL-53Al的比表面积（590 m2 g−1）。此外，基于mil - 53al的水力发电机实现高输出电压（270 mV），因此排名为最高效的发电机之一。分子动力学模拟表明，该器件中的纳米通道具有离子选择性，导致Cl−的迁移速度快于Na+。这项工作为从废聚酯中大规模、绿色地生产MOF提供了新的机会，并有助于开发先进的水力发电机。

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来源期刊

Chemical Engineering Journal 工程技术-工程：化工

CiteScore

21.70

自引率

9.30%

发文量

6781

审稿时长

2.4 months

期刊介绍： The Chemical Engineering Journal is an international research journal that invites contributions of original and novel fundamental research. It aims to provide an international platform for presenting original fundamental research, interpretative reviews, and discussions on new developments in chemical engineering. The journal welcomes papers that describe novel theory and its practical application, as well as those that demonstrate the transfer of techniques from other disciplines. It also welcomes reports on carefully conducted experimental work that is soundly interpreted. The main focus of the journal is on original and rigorous research results that have broad significance. The Catalysis section within the Chemical Engineering Journal focuses specifically on Experimental and Theoretical studies in the fields of heterogeneous catalysis, molecular catalysis, and biocatalysis. These studies have industrial impact on various sectors such as chemicals, energy, materials, foods, healthcare, and environmental protection.