Novel Fe₃O₄/SixNH₂/polyaniline quaternary magnetic nanocomposites for efficient removal of hexavalent chromium from water

IF 5.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Research Bulletin Pub Date : 2025-03-22 DOI:10.1016/j.materresbull.2025.113444

Hind Hajjaoui , Wafaa Boumya , Amal Soufi , Hanane Tounsadi , Mohamed Abdennouri , Salah Knani , Noureddine Barka

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Abstract

In the current study, the adsorption performance of three novel magnetic nanocomposites, Fe₃O₄/Si_1/2NH₂/PAni, Fe₃O₄/Si_1/5NH₂/PAni, and Fe₃O₄/Si_1/10NH₂/PAni were tested for Cr(VI) adsorption in an aqueous medium under different conditions. The highest adsorbed amounts were 474.5, 537.6, and 563.8 mg/g, respectively, for Fe₃O₄/Si_1/10NH₂/PAni, Fe₃O₄/Si_1/5NH₂/PAni, and Fe₃O₄/Si_1/2NH₂/PAni. According to the regeneration study, the Fe₃O₄/Si_1/2NH₂/PAni showed a minimal decrease in removal efficiency after four adsorption/desorption cycles (85 %), compared to Fe₃O₄/Si_1/5NH₂/PAni (78 %), and Fe₃O₄/Si_1/10NH₂/PAni (49 %). Therefore, increasing the percentage of silica in the nanocomposite reduced the adsorbed amount of Cr(VI), magnetic, and regeneration properties of the nanocomposite. Afterward, a Box-Behnken experimental design was employed to identify the optimal conditions for Cr(VI) removal, achieving 98.80 % efficiency at a pH of 2.12, 0.115 mg/L of Fe₃O₄/Si_1/2NH₂/PAni amount, and a Cr(VI) concentration of 10.07 mg/L. The physicochemical properties of the Fe₃O₄/Si_1/2NH₂/PAni nanocomposite were determined using FESEM-EDX, HRTEM, XRD, FT-IR, Raman, and TGA. The structural analysis confirms the successful coating of silica, silane and polyaniline over Fe₃O₄ surface.

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新型Fe₃O₄/SixNH₂/聚苯胺四级磁性纳米复合材料高效去除水中六价铬

本研究测试了Fe3O4/Si1/2NH2/PAni、Fe3O4/Si1/5NH2/PAni和Fe3O4/Si1/10NH2/PAni三种新型磁性纳米复合材料在不同条件下对Cr（VI）在水介质中的吸附性能。Fe3O4/Si1/10NH2/PAni、Fe3O4/Si1/5NH2/PAni和Fe3O4/Si1/2NH2/PAni的最高吸附量分别为474.5、537.6和563.8 mg/g。再生研究表明，经过4次吸附/解吸循环后，Fe3O4/Si1/2NH2/PAni的去除率（85%）较Fe3O4/Si1/5NH2/PAni（78%）和Fe3O4/Si1/10NH2/PAni（49%）略有下降。因此，增加纳米复合材料中二氧化硅的含量会降低纳米复合材料对Cr（VI）的吸附量、磁性和再生性能。随后，采用Box-Behnken实验设计确定了去除Cr（VI）的最佳条件，pH为2.12，Fe3O4/Si1/2NH2/PAni用量为0.115 mg/L, Cr（VI）浓度为10.07 mg/L，去除率为98.80%。采用FESEM-EDX、HRTEM、XRD、FT-IR、Raman和TGA等方法对Fe3O4/Si1/2NH2/PAni纳米复合材料的理化性质进行了表征。结构分析证实了二氧化硅、硅烷和聚苯胺在Fe3O4表面的成功涂层。

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来源期刊

Materials Research Bulletin 工程技术-材料科学：综合

CiteScore

9.80

自引率

5.60%

发文量

372

审稿时长

42 days

期刊介绍： Materials Research Bulletin is an international journal reporting high-impact research on processing-structure-property relationships in functional materials and nanomaterials with interesting electronic, magnetic, optical, thermal, mechanical or catalytic properties. Papers purely on thermodynamics or theoretical calculations (e.g., density functional theory) do not fall within the scope of the journal unless they also demonstrate a clear link to physical properties. Topics covered include functional materials (e.g., dielectrics, pyroelectrics, piezoelectrics, ferroelectrics, relaxors, thermoelectrics, etc.); electrochemistry and solid-state ionics (e.g., photovoltaics, batteries, sensors, and fuel cells); nanomaterials, graphene, and nanocomposites; luminescence and photocatalysis; crystal-structure and defect-structure analysis; novel electronics; non-crystalline solids; flexible electronics; protein-material interactions; and polymeric ion-exchange membranes.