水溶液
热重分析
吸附
材料科学
化学工程
木质素
沸石咪唑盐骨架
海绵
傅里叶变换红外光谱
核化学
有机化学
化学
金属有机骨架
植物
生物
工程类
作者
Fei Sun,Mengjia Zhang,Haixin Zhu,Y. Huang,Bin Song,Peijiang Wang,Shanshan Jiang,Bin Wang
出处
期刊:Green Materials
[Thomas Telford Ltd.]
日期:2023-11-06
卷期号:: 1-8
标识
DOI:10.1680/jgrma.23.00075
摘要
Zeolitic imidazolate framework-8 (ZIF-8) is extensively researched and used because of its exclusive structural and excellent physicochemical properties; however, significant challenges of alleviating the adverse effects of its particle form in many aspects are still faced by the scientific community. In this study, in situ growth of ZIF-8 within the pore channels and surfaces of green cellulose-based wood sponge was attempted through polydopamine-mediated incubation. The wood sponge was prepared by eliminating lignin and hemicellulose from natural balsa wood. Then, the sponge was impregnated with dopamine aqueous solution to yield polydopamine-covered wood sponge (PWS). ZIF-8 crystals were ultimately in situ grown in the substrate after sequential impregnation with zinc nitrate hexahydrate and 2-methylimidazole aqueous solutions at room temperature. Additionally, the effects of the deposition concentration of the dopamine aqueous solution and ZIF-8 incubation time were investigated. The obtained ZIF-8@PWS was characterized using Fourier transform infrared spectroscopy, scanning electron microscopy, X-ray diffraction, Brunauer–Emmett–Teller analysis and thermogravimetric analysis. Finally, the toluene adsorption performance of porous ZIF-8@PWS in aqueous solution was also briefly evaluated, and it was demonstrated that the maximum adsorption capacity was 106.4 mg/g and the removal rate was as high as 94.2%. This work validates the envisioned universal protocol of preparing ZIF-8-decorated porous substrates through the integrated mediating role of polydopamine.
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