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Selective Co(II) Adsorption Using Hollow ZIF-8 Nanostructures with Embedded Fe3O4 Nanoparticles
Zha, Xiaoqian1; Lu, Zhou2; Liu, Junyan1; Lu, Shun3; Wang, Yang1
2023-12-12
摘要In this study, we developed a magnetic hollow metal-organic framework (Fe3O4/HZIF-8) nanocomposite by modifying ZIF-8 nanocrystals with magnetic Fe3O4 nanoparticles at room temperature. The resulting Fe3O4/HZIF-8 nanostructured composite was used as an absorbent for Co(II) elimination. Due to the functionalization of Fe3O4 nanoparticles and the hollow structure of ZIF-8, the prepared absorbent showed a maximum adsorption capacity of 155.8 mg g(-1) within 4 h and could be easily separated from the matrix using magnetization. Additionally, the absorbent exhibited a wide pH tolerance range from pH 2.0 to 9.0 and maintained excellent selectivity for Co(II) adsorption in simulated wastewater. The experimental data was well described by the pseudo-second-order kinetic model and the Langmuir adsorption isotherm model. The ultraviolet-visible spectroscopy (UV-vis), Fourier transform infrared spectroscopy (FTIR), and X-ray photoelectron spectroscopy (XPS) studies further indicated that complexation reactions dominated the adsorption of Co(II). Thereby, the nanostructured hollow MOF could be performed as a high-performance absorbent for pollutant removal. This work sheds light on the nanostructured design and uptake mechanism study of the metal ions and radionuclide removal.
关键词hollow metal-organic framework Fe3O4 nanoparticles cobalt ion adsorption nanostructured adsorbent simulated wastewater
DOI10.1021/acsanm.3c05052
发表期刊ACS APPLIED NANO MATERIALS
卷号6期号:24页码:23630-23638
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:001130218900001
语种英语