Recovery of Bis(2-hydroxyethyl) terephthalate and terephthalic acid from waste PET bottles for synthesis of cerium-based metal-organic frameworks: A study towards supercapacitor applications

IF 4.5 3区工程技术 Q1 CHEMISTRY, APPLIED

Reactive & Functional Polymers Pub Date : 2024-11-10 DOI:10.1016/j.reactfunctpolym.2024.106101

Loganathan M , Rajendraprasad M , A. Murugesan , T. Arun

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引用次数: 0

Abstract

Controlled chemical recycling of plastic waste is a most important concern to reduce plastic waste as well as effective recovery of the various byproducts without toxic emission. In this study, we focused on effective recovery of Bis-2-hydroxyethylene terephthalate (r-BHET) from polyethylene terephthalate (PET) waste via solvent free melt depolymerization process. Recovered BHET was converted into terephthalic acid (r-TPA) by hydrolysis. Both r-BHET and r-TPA were used to construct a metal organic framework (MOF) with cerium metal for potential energy applications. Extensive characterization, including Fourier Transform Infrared Spectroscopy (FTIR), Nuclear Magnetic Resonance (NMR), Field Emission Scanning Electron Microscopy (FE-SEM), and Energy-Dispersive X-ray Spectroscopy (EDX) were confirmed the structural integrity and purity of the r-BHET and r-TPA and provides insights into the well-defined structure and elemental composition of the MOFs. The specific capacitances of BHET and TPA-Ce-MOF were found to be 91.5 and 220.1 F/g respectively. Comprehensive characterization ensures the quality of the recovered products and synthesized MOFs, promoting environmentally conscious strategies in materials synthesis and energy storage applications.

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从废 PET 瓶中回收对苯二甲酸二（2-羟乙基）酯和对苯二甲酸，用于合成铈基金属有机框架：超级电容器应用研究

要减少塑料废弃物，并在不排放有毒物质的情况下有效回收各种副产品，对塑料废弃物进行有控制的化学回收是最重要的问题。在这项研究中，我们重点研究了通过无溶剂熔融解聚工艺从聚对苯二甲酸乙二酯（PET）废料中有效回收对苯二甲酸乙二酯（r-BHET）。回收的 BHET 通过水解转化为对苯二甲酸（r-TPA）。r-BHET 和 r-TPA 被用于构建一种含金属铈的金属有机框架 (MOF)，以实现潜在的能源应用。包括傅立叶变换红外光谱（FTIR）、核磁共振（NMR）、场发射扫描电子显微镜（FE-SEM）和能量色散 X 射线光谱（EDX）在内的广泛表征证实了 r-BHET 和 r-TPA 的结构完整性和纯度，并提供了有关 MOFs 明确结构和元素组成的深入见解。BHET 和 TPA-Ce-MOF 的比电容分别为 91.5 和 220.1 F/g。全面的表征确保了回收产品和合成的 MOFs 的质量，促进了材料合成和储能应用中的环保策略。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Reactive & Functional Polymers 工程技术-高分子科学

CiteScore

8.90

自引率

5.90%

发文量

259

审稿时长

27 days

期刊介绍： Reactive & Functional Polymers provides a forum to disseminate original ideas, concepts and developments in the science and technology of polymers with functional groups, which impart specific chemical reactivity or physical, chemical, structural, biological, and pharmacological functionality. The scope covers organic polymers, acting for instance as reagents, catalysts, templates, ion-exchangers, selective sorbents, chelating or antimicrobial agents, drug carriers, sensors, membranes, and hydrogels. This also includes reactive cross-linkable prepolymers and high-performance thermosetting polymers, natural or degradable polymers, conducting polymers, and porous polymers. Original research articles must contain thorough molecular and material characterization data on synthesis of the above polymers in combination with their applications. Applications include but are not limited to catalysis, water or effluent treatment, separations and recovery, electronics and information storage, energy conversion, encapsulation, or adhesion.