Functional group directed tuning of highly recyclable Zr-MOF beads for preferential VOC adsorption

IF 4.8 3区材料科学 Q1 CHEMISTRY, APPLIED

Microporous and Mesoporous Materials Pub Date : 2025-05-20 DOI:10.1016/j.micromeso.2025.113700

Stephen Lirio , Shuo-Hung Kao , Yu-Lun Lai , Cheng-Shiuan Lee , Pamela Berilyn So , Chia-Her Lin

{"title":"Functional group directed tuning of highly recyclable Zr-MOF beads for preferential VOC adsorption","authors":"Stephen Lirio , Shuo-Hung Kao , Yu-Lun Lai , Cheng-Shiuan Lee , Pamela Berilyn So , Chia-Her Lin","doi":"10.1016/j.micromeso.2025.113700","DOIUrl":null,"url":null,"abstract":"<div><div>Volatile organic compounds (VOCs) are pollutants representing a great risk to human health. In this study, the adsorption performance of various zirconium metal organic frameworks (Zr-MOFs) and their composites with polyvinyl alcohol (PVA) was systematically evaluated toward preferential adsorption of polar, non-polar, and acidic VOCs. Zr-MOFs were selected for their ease of preparation, structural stability, tunability, and ability to incorporate diverse functional groups. The composites (Zr-MOFs@PVA) were fabricated <em>via</em> freeze granulation process by embedding Zr-MOFs in PVA at an optimized ratio. Among the Zr-MOF powders, UiO-66-NH<sub>2</sub> exhibited high adsorption for acetone, and isopropanol (IPA) due to its exposed –NH<sub>2</sub> groups, while highly defective UiO-66 demonstrated greater affinity for non-polar toluene, attributed to its high surface area and defect sites. Upon PVA incorporation, the Zr-MOFs@PVA beads exhibited significantly enhanced adsorption capacities for most VOCs tested, outperforming commercial activated carbon and zeolite adsorbents. This enhancement is attributed to the synergistic tuning of surface properties and pore environments induced by PVA. Notably, UiO-66@PVA beads showed the most versatile and consistent performance, demonstrating excellent reusability over 10 adsorption-desorption cycles without loss of crystallinity. Furthermore, under dynamic low-concentration, it achieved a toluene adsorption capacity of 314.45 mg/g. These findings highlight the potential of Zr-MOF@PVA composites as efficient and reusable VOC adsorbent for air purification applications.</div></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":"395 ","pages":"Article 113700"},"PeriodicalIF":4.8000,"publicationDate":"2025-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Microporous and Mesoporous Materials","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1387181125002148","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, APPLIED","Score":null,"Total":0}

引用次数: 0

Abstract

Volatile organic compounds (VOCs) are pollutants representing a great risk to human health. In this study, the adsorption performance of various zirconium metal organic frameworks (Zr-MOFs) and their composites with polyvinyl alcohol (PVA) was systematically evaluated toward preferential adsorption of polar, non-polar, and acidic VOCs. Zr-MOFs were selected for their ease of preparation, structural stability, tunability, and ability to incorporate diverse functional groups. The composites (Zr-MOFs@PVA) were fabricated via freeze granulation process by embedding Zr-MOFs in PVA at an optimized ratio. Among the Zr-MOF powders, UiO-66-NH₂ exhibited high adsorption for acetone, and isopropanol (IPA) due to its exposed –NH₂ groups, while highly defective UiO-66 demonstrated greater affinity for non-polar toluene, attributed to its high surface area and defect sites. Upon PVA incorporation, the Zr-MOFs@PVA beads exhibited significantly enhanced adsorption capacities for most VOCs tested, outperforming commercial activated carbon and zeolite adsorbents. This enhancement is attributed to the synergistic tuning of surface properties and pore environments induced by PVA. Notably, UiO-66@PVA beads showed the most versatile and consistent performance, demonstrating excellent reusability over 10 adsorption-desorption cycles without loss of crystallinity. Furthermore, under dynamic low-concentration, it achieved a toluene adsorption capacity of 314.45 mg/g. These findings highlight the potential of Zr-MOF@PVA composites as efficient and reusable VOC adsorbent for air purification applications.

查看原文本刊更多论文

高可回收Zr-MOF珠的官能团定向调谐，以优先吸附VOC

挥发性有机化合物（VOCs）是危害人类健康的污染物。本研究系统评价了各种金属锆有机骨架（Zr-MOFs）及其与聚乙烯醇（PVA）复合材料对极性、非极性和酸性VOCs的优先吸附性能。选择Zr-MOFs是因为它们易于制备、结构稳定、可调性以及能够加入多种官能团。将Zr-MOFs以最佳配比包埋在PVA中，通过冷冻造粒法制备了复合材料（Zr-MOFs@PVA）。在Zr-MOF粉末中，UiO-66-NH2由于其暴露的-NH2基团而对丙酮和异丙醇（IPA）具有较高的吸附能力，而高缺陷的UiO-66由于其高表面积和缺陷位点而对非极性甲苯具有更强的亲和力。加入PVA后，Zr-MOFs@PVA微球对大多数VOCs的吸附能力显著增强，优于商用活性炭和沸石吸附剂。这种增强归因于PVA诱导的表面性质和孔隙环境的协同调节。值得注意的是，UiO-66@PVA微珠表现出最通用和一致的性能，在10次吸附-解吸循环中表现出优异的可重复使用性，而结晶度没有损失。在动态低浓度条件下，对甲苯的吸附量可达314.45 mg/g。这些发现突出了Zr-MOF@PVA复合材料作为高效和可重复使用的VOC吸附剂在空气净化应用中的潜力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

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.