| Design and syntheses of functionalized copper-based MOFs and its adsorption behavior for Pb(Ⅱ) |
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| 作者姓名： | Jingping Zhong Jian Zhou Minsi Xiao Jun Liu Jili Shen Juan Liu Sili Ren |
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| 作者单位： | Jiangxi Key Laboratory of Mining Engineering, School of Resources and Environmental Engineering, Jiangxi University of Science and Technology |
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| 基金项目： | financial support from the National Key Research and Development Program of China (No. 2018YFC1903401)；;Key Projects of Natural Science Foundation of Jiangxi Province (No. 20202ACBL203009)； |
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| 摘 要： | A novel copper-based MOFs adsorbent(Cu-BTC-Th) was prepared using an one-step method by introducing a new organic ligand of 4-thioureidobenzoicacid(Th) with active groups for selectively adsorbing Pb(Ⅱ) from aqueous solutions. The chemical composition and structure of the prepared MOFs materials were characterized by scanning electron microscope(SEM), X-ray diffraction(XRD), fourier transform infrared spectroscopy(FTIR), X-ray photoelectron spectroscopy(XPS), Brunner-Emmet-Teller(BET) analysis, ...
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| 收稿时间： | 23 February 2021 |
Design and syntheses of functionalized copper-based MOFs and its adsorption behavior for Pb(II) |
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| Jingping Zhong,Jian Zhou,Minsi Xiao,Jun Liu,Jili Shen,Juan Liu,Sili Ren.Design and syntheses of functionalized copper-based MOFs and its adsorption behavior for Pb(II)[J].Chinese Chemical Letters,2022,33(2):973-978. |
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| Institution: | Jiangxi Key Laboratory of Mining Engineering, School of Resources and Environmental Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China |
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| Abstract: | A novel copper-based MOFs adsorbent (Cu-BTC-Th) was prepared using an one-step method by introducing a new organic ligand of 4-thioureidobenzoicacid (Th) with active groups for selectively adsorbing Pb(II) from aqueous solutions. The chemical composition and structure of the prepared MOFs materials were characterized by scanning electron microscope (SEM), X-ray diffraction (XRD), fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS ), Brunner?Emmet?Teller (BET) analysis, and zeta potential measurements. The adsorption capability of the prepared Cu-MOFs was significantly enhanced by introducing the new organic ligand of Th in the materials. The maximum adsorption capacity of the Cu-BTC-Th for Pb(II) attains 732.86 mg/g under the optimal conditions. In addition, the adsorption kinetics and adsorption isotherm analysis showed that the adsorption process followed the pseudo-second-order kinetic model and Langmuir adsorption model, indicating that the adsorption of Pb(II) by Cu-BTC-Th was a monolayer chemisorption. The adsorption mechanism of Cu-BTC-Th for Pb(II) was discussed and revealed. On one hand, the adsorption of Pb(II) is mainly through ion exchange with the Cu(II). On the other hand, the ?NH2 and ?C=S functional groups introduced in the Cu-BTC-Th materials have stronger coordination ability with the Pb(II) ions to enhance the adsorption capability. |
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