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Three-dimensional hydrangea-like layered double hydroxide anchoring hollow metal organic-framework for efficient adsorption of 2, 4-dichlorophenoxyacetic acid
Zha, Xiaoqian1; Sun, Wang1; Liu, Junyan1; Sun, Guorong1; Lu, Shun2; Wang, Yang1
2024-01-01
摘要In this work, a facile approach to create a layered double hydroxide@hollow zeolitic imidazolate framework-8 nanocomposites (LDH@HZIF-8) was performed for the removal of 2, 4-dichlorophenoxyacetic acid (2,4-D) in food samples. This novel material inherits the advantages of pristine metal-organic frameworks. Additionally, it possesses a hierarchical pore structure, a hollow cavity, a large specific surface area (624.09 m(2) g(-1)), and improved dispersity of ZIF-8. The potential of LDH@HZIF-8 as an adsorbent for removing 2,4-D from food samples was investigated. Our findings revealed a significant maximum adsorption capacity of 178.6 mg g(-1) at 25 degrees C, along with fast adsorption kinetics within 20 min. The adsorption process was well described by the pseudo-second-order kinetics and Langmuir model. Furthermore, thermodynamic data indicated that the adsorption process was exothermic in nature. This novel composite effectively addresses the issues associated with sluggish mass transfer of target molecules/ions and a shortage of active sites. Moreover, LDH@HZIF-8 offers spacious cavities and channels that are capable of accommodating the desired substances.
关键词Hollow metal-organic frameworks Layered double hydroxide 2 4-Dichlorophenoxyacetic acid Adsorption kinetics
DOI10.1016/j.mtchem.2023.101883
发表期刊MATERIALS TODAY CHEMISTRY
ISSN2468-5194
卷号35页码:10
通讯作者Lu, Shun(lushun@cigit.ac.cn) ; Wang, Yang(wangyzu@126.com)
收录类别SCI
WOS记录号WOS:001157410900001
语种en