High-yield 5-hydroxymethylfurfural synthesis via fructose dehydration catalyzed by a core-shell structured magnetic solid acid

IF 4.8 2区化学 Q2 CHEMISTRY, PHYSICAL

Applied Catalysis A: General Pub Date : 2025-09-19 DOI:10.1016/j.apcata.2025.120587

Rui Zhu , Shike She , Yuxuan Zhou , Youting Wang , Fang Gao , Liang Zhang

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引用次数: 0

Abstract

The efficient synthesis of 5-hydroxymethylfurfural (HMF) constitutes a critical pathway for establishing sustainable biorefinery systems. To address the challenges of catalyst recovery difficulties and active site deactivation in conventional solid acid catalysts, a magnetic core-shell structured solid acid catalyst (Co@NC-SO₃H) for fructose dehydration to HMF was developed in this manuscript. The catalyst integrated sulfonic acid groups (-SO₃H) anchored on nitrogen-doped carbon nanotubes with in-situ immobilized cobalt nanoparticles, synergistically combining Brønsted acid sites with magnetic responsiveness. Comprehensive characterization through FT-IR (Fourier Transform Infrared Spectroscopy), XRD (X-Ray Diffraction), SEM (Scanning Electron Microscopy), and XPS (X-ray Photoelectron Spectroscopy) elucidated its microstructural evolution and elemental distribution. Systematic optimization of reaction parameters (temperature, solvent, reaction time, water content, and so on) achieved > 90 % yield of HMF, with 99 % conversion of fructose. The magnetic core-shell configuration enabled rapid catalyst separation via an external magnetic field, retaining > 90 % initial activity after 5 cycles with almost no metal leaching, demonstrating exceptional stability under hydrothermal conditions. This work advanced the development of catalysts for the dehydration of fructose to synthesize HMF, offering critical insights for advancing green and sustainable HMF production.

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核-壳结构磁性固体酸催化果糖脱水合成高收率5-羟甲基糠醛

5-羟甲基糠醛（HMF）的高效合成是建立可持续生物炼制体系的重要途径。为了解决传统固体酸催化剂中催化剂回收困难和活性位点失活的挑战，本文开发了一种用于果糖脱水制HMF的磁性核壳结构固体酸催化剂（Co@NC-SO3H）。催化剂将锚定在氮掺杂碳纳米管上的磺酸基团（-SO3H）与原位固定的钴纳米颗粒结合在一起，协同结合具有磁性响应性的Brønsted酸位点。通过FT-IR（傅里叶变换红外光谱）、XRD （x射线衍射）、SEM（扫描电子显微镜）和XPS （x射线光电子能谱）对其进行综合表征，阐明了其微观结构演变和元素分布。系统优化反应参数（温度、溶剂、反应时间、含水量等），使HMF产率>； 90 %，果糖转化率为99 %。磁性核壳结构使催化剂能够通过外部磁场快速分离，在5个循环后几乎没有金属浸出，保持>； 90 %的初始活性，在水热条件下表现出优异的稳定性。这项工作促进了果糖脱水合成HMF催化剂的发展，为推进绿色和可持续的HMF生产提供了重要的见解。

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来源期刊

Applied Catalysis A: General 化学-环境科学

CiteScore

9.00

自引率

5.50%

发文量

415

审稿时长

24 days

期刊介绍： Applied Catalysis A: General publishes original papers on all aspects of catalysis of basic and practical interest to chemical scientists in both industrial and academic fields, with an emphasis onnew understanding of catalysts and catalytic reactions, new catalytic materials, new techniques, and new processes, especially those that have potential practical implications. Papers that report results of a thorough study or optimization of systems or processes that are well understood, widely studied, or minor variations of known ones are discouraged. Authors should include statements in a separate section "Justification for Publication" of how the manuscript fits the scope of the journal in the cover letter to the editors. Submissions without such justification will be rejected without review.