Chinese Journal of Magnetic Resonance >

2026 , Vol. 43 >Issue 2: 136 - 145

DOI: https://doi.org/10.11938/cjmr20263207

Articles

Influence Mechanism of NH4F Etching on the Structure and Acidity of ZSM-5 Zeolite

  • WANG Jing ,
  • XIAO Yao ,
  • YU Xin ,
  • YI Xianfeng ,
  • ZHENG Anmin
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  • 1 State Key Laboratory of Magnetic Resonance Spectroscopy and Imaging, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan 430071, China
    2 University of Chinese Academy of Sciences, Beijing 100049, China
    3 Interdisciplinary Institute of NMR and Molecular Sciences, School of Chemistry and Chemical Engineering, Wuhan University of Science and Technology, Wuhan 430081, China

Received date: 2026-02-07

  Online published: 2026-03-19

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Abstract

Ammonium fluoride (NH4F) etching is an effective method for constructing hierarchical zeolites, yet its precise impact on the detailed structure and acidity remains unclear. This study employs probe molecule-assisted solid-state NMR technique to systematically investigate the evolution of acid site structures and properties during NH4F etching of ZSM-5 zeolites. The results reveal that the degree of NH4F etching significantly manipulates the amount, strength, type, and spatial accessibility of acid sites, and it is also directly associated with the development of hierarchical pore structures. This work elucidates the influence mechanism of NH4F etching on zeolite structure and acidic property at the atomic level, providing a theoretical foundation for the rational design and optimization of efficient hierarchical zeolites.

Key words： solid-state NMR; acidic property; probe molecule; NH4F etching; hierarchical zeolites

Cite this article

WANG Jing , XIAO Yao , YU Xin , YI Xianfeng , ZHENG Anmin . Influence Mechanism of NH4F Etching on the Structure and Acidity of ZSM-5 Zeolite[J]. Chinese Journal of Magnetic Resonance, 2026 , 43(2) : 136 -145 . DOI: 10.11938/cjmr20263207

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