核壳催化剂中SiO2壳层的可控合成与精准调控研究进展

摘要/Abstract

摘要： 以纳米多孔材料为壳层的核壳催化剂中，SiO₂因结构稳定、化学惰性、表面易调控，成为实现分子筛分功能的优选壳层材料。SiO2壳层的连续性、厚度及孔结构是决定核壳催化剂催化性能的关键因素。溶胶-凝胶法因合成条件温和、操作简便、结构可控，是制备SiO2壳层核壳催化剂的主要方法。系统综述了该方法制备过程的主要参数（硅源、模板剂、合成条件及后处理条件等）对SiO₂壳层结构的影响规律及作用机理，分析调控过程中的关键挑战，并展望了未来优化方向，旨在为精准构筑SiO₂壳层，借助核壳协同作用实现催化剂性能提升提供参考。

关键词: 核壳催化剂, 二氧化硅, 壳层, 厚度, 孔径

Abstract: In core-shell catalysts with nanoporous materials as the shell layer, SiO₂ material has emerged as a preferred shell material for molecular sieving attributed to its superior structural stability, chemical inertness and facile surface modifiability. Effective control over key structural parameters of the SiO₂ shell, continuity, thickness ,and pore structure are the key factors governing the catalytic performance of core-shell catalysts. Achieving such precise structural control necessitates advanced synthesis strategies. In this regard, the sol-gel method has emerged as a dominant synthetic strategy for fabricating SiO₂ shelled core-shell catalysts, owing to its mild reaction conditions, facile operation and ability to yield tailorable structures. This review focus on the sol-gel method, systematically examining the influence and mechanisms of key preparation parameters (silicon sources, templates, reaction conditions, and post-treatment conditions) on the structural and physicochemical properties of the SiO₂ shell. Furthermore, the challenges encountered in the structural regulation of the SiO₂ shell comprehensively analyzed and future optimization directions are prospected. This work was expected to provide a reference for the precise construction of SiO₂ shell and the enhancement of catalytic performance in core-shell catalysts.

Key words: core-shell catalyst, SiO2, shell, thickness, pore diameter

孙佳新贾燕子胡大为聂红. 核壳催化剂中SiO₂壳层的可控合成与精准调控研究进展[J]. 石油炼制与化工, 2026, 57(10): 1-10.

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核壳催化剂中SiO₂壳层的可控合成与精准调控研究进展

RESEARCH PROGRESS ON CONTROLLABLE SYNTHESIS AND PRECISE REGULATION OF SiO₂ SHELL IN CORE-SHELL CATALYSTS

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