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<p>This study delves into the development and analysis of novel hydrogels created from cellulose extracted from <i>Apocynum venetum</i> leaves, blended with chitosan, and subsequently transformed into magnetic hydrogels with different magnetic intensities. The hydrogels—cellulose-based (CH), chitosan-based (QH), and their magnetic counterparts (MC, MQ)—were thoroughly characterization by SEM, FTIR, XRD, and VSM techniques. SEM imagery showcased the unique structures of the hydrogels, with CH displaying a highly porous configuration that greatly boosted its anionic dye (CR) adsorption capacity. FTIR spectra validated the existence of hydroxyl (around 3340&#xa0;cm⁻<sup>1</sup>) and amine groups (N–H bending around 1550&#xa0;cm⁻<sup>1</sup> in QH), with shifts in the O–H and N–H regions for MC and MQ indicating interactions with magnetic particles. XRD patterns signified crystalline features of cellulose (peak at 2θ ~ 22.5°) and chitosan (peak at 2θ ~ 29°), and the successful incorporation of magnetite nanoparticles in MC and MQ was confirmed by characteristic peaks (2θ ~ 38°, 64.5°, 77.5°), and VSM readings attested to the magnetic attributes of the modified hydrogels. Adsorption trials revealed that CH hydrogels exhibited an outstanding CR adsorption capacity (Q<sub>max</sub>≈ 650.4&#xa0;mg/g), while QH hydrogels showed superior Cu<sup>2</sup>⁺ removal efficiency (Q<sub>max</sub> ≈ 120.20&#xa0;mg/g).</p> Graphical Abstract <p></p>

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Magnetic hydrogels from Apocynum leaf cellulose and chitosan: synthesis, characterization, and adsorption performance study

  • 期刊论文

  • 发表日期：

    2025年10月3日

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  • J. I. A. Shunpeng,
  • Xu Hai Yang,
  • Pan Ying Ni,
  • Jia Ling Yun

摘要

This study delves into the development and analysis of novel hydrogels created from cellulose extracted from Apocynum venetum leaves, blended with chitosan, and subsequently transformed into magnetic hydrogels with different magnetic intensities. The hydrogels—cellulose-based (CH), chitosan-based (QH), and their magnetic counterparts (MC, MQ)—were thoroughly characterization by SEM, FTIR, XRD, and VSM techniques. SEM imagery showcased the unique structures of the hydrogels, with CH displaying a highly porous configuration that greatly boosted its anionic dye (CR) adsorption capacity. FTIR spectra validated the existence of hydroxyl (around 3340 cm⁻1) and amine groups (N–H bending around 1550 cm⁻1 in QH), with shifts in the O–H and N–H regions for MC and MQ indicating interactions with magnetic particles. XRD patterns signified crystalline features of cellulose (peak at 2θ ~ 22.5°) and chitosan (peak at 2θ ~ 29°), and the successful incorporation of magnetite nanoparticles in MC and MQ was confirmed by characteristic peaks (2θ ~ 38°, 64.5°, 77.5°), and VSM readings attested to the magnetic attributes of the modified hydrogels. Adsorption trials revealed that CH hydrogels exhibited an outstanding CR adsorption capacity (Qmax≈ 650.4 mg/g), while QH hydrogels showed superior Cu2⁺ removal efficiency (Qmax ≈ 120.20 mg/g).

Graphical Abstract