Fabrication of core-shell structural Y@VTMS-DVB composites with enhanced hydrophobicity for toluene capture under humid environment

IF 4.8 3区材料科学 Q1 CHEMISTRY, APPLIED Microporous and Mesoporous Materials Pub Date : 2024-09-24 DOI:10.1016/j.micromeso.2024.113350

Chang Lu, Xi Zhang, Pengfei Zhang, Lingling Ren, Nengjie Feng, Hui Wan, Guofeng Guan

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Abstract

Zeolite Y serves as an effective adsorbent for VOCs capture due to its ordered porous structure, exceptional thermal stability, chemical resistance and fine-tune key properties. However, the hydrophilicity caused by the low SiO₂/Al₂O₃ ratio seriously limits its industrial application, especially in humid environments. In this work, a series of core-shell composites Y@VTMS-DVB_n were prepared through surface grafting and copolymerization. A variety of characterizations were utilized to study the structural and morphological changes of the prepared samples. The dynamic breakthrough adsorption experiment showed that the toluene uptake was significantly improved from 1.77 mg/g to 53.09 mg/g under 30 % relative humidity. Moreover, the core-shell composite exhibited excellent regeneration properties, the adsorption capacity remained 90 % under wet conditions after 6 cycles of regeneration. Adsorption kinetic analysis revealed that the adsorption behavior of toluene on the prepared adsorbents was primarily physical adsorption. These results show that the core-shell composite is a promising candidate for VOCs removal in industrial application.

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制备具有增强疏水性的核壳结构 Y@VTMS-DVB 复合材料，用于在潮湿环境下捕获甲苯

沸石 Y 具有有序的多孔结构、优异的热稳定性、耐化学性和微调的关键特性，可作为捕捉挥发性有机化合物的有效吸附剂。然而，由于 SiO2/Al2O3 比率较低而导致的亲水性严重限制了其工业应用，尤其是在潮湿环境中。本研究通过表面接枝和共聚制备了一系列核壳复合材料 Y@VTMS-DVBn。利用多种表征方法研究了所制备样品的结构和形态变化。动态突破吸附实验表明，在相对湿度为 30% 的条件下，甲苯吸附量从 1.77 mg/g 显著提高到 53.09 mg/g。此外，核壳复合材料还具有优异的再生性能，在湿润条件下经过 6 次再生后，吸附容量仍能保持 90%。吸附动力学分析表明，甲苯在制备的吸附剂上的吸附行为主要是物理吸附。这些结果表明，芯壳复合材料是工业应用中去除挥发性有机化合物的理想候选材料。

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来源期刊

Microporous and Mesoporous Materials 化学-材料科学：综合

CiteScore

10.70

自引率

5.80%

发文量

649

审稿时长

26 days

期刊介绍： Microporous and Mesoporous Materials covers novel and significant aspects of porous solids classified as either microporous (pore size up to 2 nm) or mesoporous (pore size 2 to 50 nm). The porosity should have a specific impact on the material properties or application. Typical examples are zeolites and zeolite-like materials, pillared materials, clathrasils and clathrates, carbon molecular sieves, ordered mesoporous materials, organic/inorganic porous hybrid materials, or porous metal oxides. Both natural and synthetic porous materials are within the scope of the journal. Topics which are particularly of interest include: All aspects of natural microporous and mesoporous solids The synthesis of crystalline or amorphous porous materials The physico-chemical characterization of microporous and mesoporous solids, especially spectroscopic and microscopic The modification of microporous and mesoporous solids, for example by ion exchange or solid-state reactions All topics related to diffusion of mobile species in the pores of microporous and mesoporous materials Adsorption (and other separation techniques) using microporous or mesoporous adsorbents Catalysis by microporous and mesoporous materials Host/guest interactions Theoretical chemistry and modelling of host/guest interactions All topics related to the application of microporous and mesoporous materials in industrial catalysis, separation technology, environmental protection, electrochemistry, membranes, sensors, optical devices, etc.