Shaped binderless high SiO2/Al2O3 ratio Beta/ZSM-5 composites for volatile organic compounds adsorption

IF 2.5 4区材料科学 Q2 CHEMISTRY, APPLIED Journal of Porous Materials Pub Date : 2024-04-14 DOI:10.1007/s10934-024-01593-w

Liping Qu, Yaquan Wang, Wenrong Liu, Lingzhen Bu, Yitong Huang, Kailiang Chu, Niandong Guo, Juncai Sang, Xian Zhang, Xuemei Su, Yaoning Li

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Abstract

Volatile organic compounds (VOCs) are primary components of air pollutants that pose a risk to the environment and public health. Adsorption is regarded as one of the most effective and practical strategies for dealing with VOCs contamination. A series of shaped binderless Beta/ZSM-5 composites were produced by a vapor-phase transfer method and dealuminated using a sulfuric acid solution to increase SiO₂/Al₂O₃ ratio after steaming treatment to further increase the hydrophobicity of the samples. The shaped binderless Beta/ZSM-5 composites were characterized with XRD, SEM, TEM, XRF, NMR and N₂ adsorption-desorption. The VOCs adsorption properties of the dealuminated Beta/ZSM-5 mesoporous composites and microporous ZSM-5 zeolites were assessed using dynamic adsorption experiments and temperature-programmed desorption (TPD) under both dry and wet environments. The results revealed that the dealuminated Beta/ZSM-5 composites have larger specific surface area and mesopore volume as well as strong hydrophobicity, and exhibit higher toluene, butyl acetate and o-xylene adsorption capacity than ZSM-5 under either dry or wet environments.

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用于吸附挥发性有机化合物的无粘结剂高 SiO2/Al2O3 比率 Beta/ZSM-5 异形复合材料

挥发性有机化合物（VOCs）是空气污染物的主要成分，对环境和公众健康构成威胁。吸附被认为是处理挥发性有机化合物污染最有效、最实用的策略之一。我们采用气相转移法制备了一系列异型无粘结剂 Beta/ZSM-5 复合材料，并在蒸气处理后使用硫酸溶液进行脱铝处理，以提高 SiO2/Al2O3 的比例，从而进一步增加样品的疏水性。对成型的无粘结剂 Beta/ZSM-5 复合材料进行了 XRD、SEM、TEM、XRF、NMR 和 N2 吸附-解吸表征。在干燥和潮湿环境下，使用动态吸附实验和温度编程解吸（TPD）评估了脱铝 Beta/ZSM-5 介孔复合材料和微孔 ZSM-5 沸石的 VOCs 吸附性能。结果表明，脱铝 Beta/ZSM-5 复合材料具有较大的比表面积和中孔体积以及较强的疏水性，在干燥或潮湿环境下都比 ZSM-5 具有更高的甲苯、醋酸丁酯和邻二甲苯吸附能力。

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来源期刊

Journal of Porous Materials 工程技术-材料科学：综合

CiteScore

4.80

自引率

7.70%

发文量

203

审稿时长

2.6 months

期刊介绍： The Journal of Porous Materials is an interdisciplinary and international periodical devoted to all types of porous materials. Its aim is the rapid publication of high quality, peer-reviewed papers focused on the synthesis, processing, characterization and property evaluation of all porous materials. The objective is to establish a unique journal that will serve as a principal means of communication for the growing interdisciplinary field of porous materials. Porous materials include microporous materials with 50 nm pores. Examples of microporous materials are natural and synthetic molecular sieves, cationic and anionic clays, pillared clays, tobermorites, pillared Zr and Ti phosphates, spherosilicates, carbons, porous polymers, xerogels, etc. Mesoporous materials include synthetic molecular sieves, xerogels, aerogels, glasses, glass ceramics, porous polymers, etc.; while macroporous materials include ceramics, glass ceramics, porous polymers, aerogels, cement, etc. The porous materials can be crystalline, semicrystalline or noncrystalline, or combinations thereof. They can also be either organic, inorganic, or their composites. The overall objective of the journal is the establishment of one main forum covering the basic and applied aspects of all porous materials.