Polydopamine (PDA) functionalized ultrathin carbon layer encapsulated magnetite nanoparticle and graphene oxide (Fe3O4@C-GO@PDA) as recyclable and stable nanoadsorbent for enhanced removal of metal ions
Efficiently eliminating metal ions from water remains a formidable challenge, primarily because of the intricate nature of impurities within the aqueous environment. In this study, magnetite nanoparticles encapsulated by an ultrathin carbon layer and graphene oxide (Fe3O4@C-GO) nanocomposite was fur...
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Elsevier
2025-09-01
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| Series: | Results in Chemistry |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2211715625005624 |
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| author | Xiaoye Wang Chenxi Wu Kui Lin Xinlong Ma Yi Wang Fei Tian |
| author_facet | Xiaoye Wang Chenxi Wu Kui Lin Xinlong Ma Yi Wang Fei Tian |
| author_sort | Xiaoye Wang |
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| description | Efficiently eliminating metal ions from water remains a formidable challenge, primarily because of the intricate nature of impurities within the aqueous environment. In this study, magnetite nanoparticles encapsulated by an ultrathin carbon layer and graphene oxide (Fe3O4@C-GO) nanocomposite was further functionalized with polydopamine (PDA) to prepare Fe3O4@C-GO@PDA nanoadsorbent with improved adsorption capabilities for the effective elimination of metal ions from aqueous solutions. The Fe3O4@C-GO@PDA nanoadsorbent showed outstanding adsorption potential. Under the optimal the experimental conditions, the Fe3O4@C-GO@PDA nanoadsorbent effectively removed Zn(II), Cu(II), Pb(II), and Cd(II) ions from aqueous solutions at pH 6, with rates of 99.1 %, 97.7 %, 94.6 %, and 91.1 %, respectively. In comparison with Fe3O4@C-GO nanocomposite, the removal rate, removal capacity and removal equilibrium time of Pb on Fe3O4@C-GO@PDA nanoadsorbent all showed a great improvement. The adsorption of Pb(II) follows pseudo-second-order kinetics (R2 = 0.9993), indicating that chemical adsorption is the dominant mechanism. XPS and FTIR analyses revealed synergistic interactions between Pb(II) and surface functional groups (–NH₂, CO, –COOH). The slightly decrease in the the removal rate in the recovery and recyclability investigations after 5 cycles indicated that Fe3O4@C-GO@PDA nanoadsorbent can be repeatedly used for the removal of for Zn(II), Cu(II), Pb(II) and Cd(II) ions from water. As a result, the Fe3O4@C-GO@PDA nanoadsorbent not only realize the removal of Pb ions from water with efficient removal but also show potential application in the separation and purification of other common metal ions. |
| format | Article |
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| institution | Kabale University |
| issn | 2211-7156 |
| language | English |
| publishDate | 2025-09-01 |
| publisher | Elsevier |
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| series | Results in Chemistry |
| spelling | doaj-art-1bef8a97f0574bdeae5a9eba019b89622025-08-20T03:58:07ZengElsevierResults in Chemistry2211-71562025-09-011710257910.1016/j.rechem.2025.102579Polydopamine (PDA) functionalized ultrathin carbon layer encapsulated magnetite nanoparticle and graphene oxide (Fe3O4@C-GO@PDA) as recyclable and stable nanoadsorbent for enhanced removal of metal ionsXiaoye Wang0Chenxi Wu1Kui Lin2Xinlong Ma3Yi Wang4Fei Tian5Academy of Medical Engineering and Translational Medicine, Tianjin University, Tianjin 300072, PR ChinaNational Key Laboratory of Chinese Medicine Modernization, State Key Laboratory of Component-based Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin 301617, PR China; Haihe Laboratory of Modern Chinese Medicine, Tianjin 301617, PR ChinaAnalytical Instrumentation Centre, Tianjin University, Tianjin 300072, PR ChinaTianjin Univ, Tianjin Hosp, 406 Jiefang Nan Rd, Tianjin 300211, PR ChinaAnalytical Instrumentation Centre, Tianjin University, Tianjin 300072, PR China; Corresponding author at: Analytical Instrumentation Centre, Tianjin University, Tianjin 300072, PR China.National Key Laboratory of Chinese Medicine Modernization, State Key Laboratory of Component-based Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin 301617, PR China; Haihe Laboratory of Modern Chinese Medicine, Tianjin 301617, PR China; Corresponding author.Efficiently eliminating metal ions from water remains a formidable challenge, primarily because of the intricate nature of impurities within the aqueous environment. In this study, magnetite nanoparticles encapsulated by an ultrathin carbon layer and graphene oxide (Fe3O4@C-GO) nanocomposite was further functionalized with polydopamine (PDA) to prepare Fe3O4@C-GO@PDA nanoadsorbent with improved adsorption capabilities for the effective elimination of metal ions from aqueous solutions. The Fe3O4@C-GO@PDA nanoadsorbent showed outstanding adsorption potential. Under the optimal the experimental conditions, the Fe3O4@C-GO@PDA nanoadsorbent effectively removed Zn(II), Cu(II), Pb(II), and Cd(II) ions from aqueous solutions at pH 6, with rates of 99.1 %, 97.7 %, 94.6 %, and 91.1 %, respectively. In comparison with Fe3O4@C-GO nanocomposite, the removal rate, removal capacity and removal equilibrium time of Pb on Fe3O4@C-GO@PDA nanoadsorbent all showed a great improvement. The adsorption of Pb(II) follows pseudo-second-order kinetics (R2 = 0.9993), indicating that chemical adsorption is the dominant mechanism. XPS and FTIR analyses revealed synergistic interactions between Pb(II) and surface functional groups (–NH₂, CO, –COOH). The slightly decrease in the the removal rate in the recovery and recyclability investigations after 5 cycles indicated that Fe3O4@C-GO@PDA nanoadsorbent can be repeatedly used for the removal of for Zn(II), Cu(II), Pb(II) and Cd(II) ions from water. As a result, the Fe3O4@C-GO@PDA nanoadsorbent not only realize the removal of Pb ions from water with efficient removal but also show potential application in the separation and purification of other common metal ions.http://www.sciencedirect.com/science/article/pii/S2211715625005624Polydopamine (PDA)Magnetite coated with ultrathin carbon layer (Fe3O4@C)NanoadsorbentMetal ionsPb(II) ions |
| spellingShingle | Xiaoye Wang Chenxi Wu Kui Lin Xinlong Ma Yi Wang Fei Tian Polydopamine (PDA) functionalized ultrathin carbon layer encapsulated magnetite nanoparticle and graphene oxide (Fe3O4@C-GO@PDA) as recyclable and stable nanoadsorbent for enhanced removal of metal ions Results in Chemistry Polydopamine (PDA) Magnetite coated with ultrathin carbon layer (Fe3O4@C) Nanoadsorbent Metal ions Pb(II) ions |
| title | Polydopamine (PDA) functionalized ultrathin carbon layer encapsulated magnetite nanoparticle and graphene oxide (Fe3O4@C-GO@PDA) as recyclable and stable nanoadsorbent for enhanced removal of metal ions |
| title_full | Polydopamine (PDA) functionalized ultrathin carbon layer encapsulated magnetite nanoparticle and graphene oxide (Fe3O4@C-GO@PDA) as recyclable and stable nanoadsorbent for enhanced removal of metal ions |
| title_fullStr | Polydopamine (PDA) functionalized ultrathin carbon layer encapsulated magnetite nanoparticle and graphene oxide (Fe3O4@C-GO@PDA) as recyclable and stable nanoadsorbent for enhanced removal of metal ions |
| title_full_unstemmed | Polydopamine (PDA) functionalized ultrathin carbon layer encapsulated magnetite nanoparticle and graphene oxide (Fe3O4@C-GO@PDA) as recyclable and stable nanoadsorbent for enhanced removal of metal ions |
| title_short | Polydopamine (PDA) functionalized ultrathin carbon layer encapsulated magnetite nanoparticle and graphene oxide (Fe3O4@C-GO@PDA) as recyclable and stable nanoadsorbent for enhanced removal of metal ions |
| title_sort | polydopamine pda functionalized ultrathin carbon layer encapsulated magnetite nanoparticle and graphene oxide fe3o4 c go pda as recyclable and stable nanoadsorbent for enhanced removal of metal ions |
| topic | Polydopamine (PDA) Magnetite coated with ultrathin carbon layer (Fe3O4@C) Nanoadsorbent Metal ions Pb(II) ions |
| url | http://www.sciencedirect.com/science/article/pii/S2211715625005624 |
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