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<p>The current study demonstrated a novel nanocomposite conducted with carboxymethyl cellulose (CMC)/polyethyleneimine (PEI) hydrogel decorated with silver nanoparticles (Ag-NPs) (CMC/PEI/Ag-NPs) was synthesized to improve the removal efficiency of anionic dyes from aqueous solutions. The resulting CMC/PEI/Ag-NPs nanocomposite was characterized through infrared spectroscopy, scanning electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, and X-ray photoelectron spectroscopy to confirm successful Ag-NPs incorporation with the CMC/PEI/Ag-NPs. The TEM images reveal that the Ag-NPs within the CMC/PEI matrix have an average diameter of approximately 100&#xa0;nm​. The instrumental analysis confirms the successful synthesis of CMC/PEI/Ag-NPs nanocomposite, highlighting the chemical interaction between CMC, PEI, and Ag-NPs. Batch adsorption experiments assessed the capacity of the composite to adsorb methyl orange (MO) under varying parameters conditions. Under optimal conditions including pH 3, an incubation time of 100&#xa0;min, a dye concentration of 500&#xa0;mg/L, and a reaction temperature of 45&#xa0;°C, the CMC/PEI/Ag-NPs nanocomposite demonstrated outstanding adsorption performance, achieving a maximum adsorption capacity of 286&#xa0;mg/g. The adsorption process was well described by the Langmuir isotherm and followed a pseudo-second-order kinetic model. The reusability of the CMC/PEI/Ag-NPs nanocomposite was evaluated, and the results demonstrated that after five adsorption–desorption cycles, its adsorption capacity remained at 66&#xa0;mg/g for MO. These findings confirm its effectiveness and durability for repeated use in the adsorption of anionic dyes. Compared to CMC/PEI, the CMC/PEI/Ag-NPs nanocomposite has excellent and more efficient sterilization efficacy against Escherichia coli (13 ± 0.93&#xa0;mm), <i>Salmonella typhimurium</i> (11 ± 0.85&#xa0;mm), <i>Pseudomonas aeruginosa</i> (12 ± 0.55&#xa0;mm), <i>Staphylococcus aureus</i> (15 ± 1.02&#xa0;mm), <i>Streptococcus mutans</i> (18 ± 1.14&#xa0;mm), and&#xa0;<i>Candida albicans</i> (16 ± 1.23&#xa0;mm). These findings suggest that the CMC/PEI/Ag-NPs nanocomposite holds promise for applications in wastewater treatment, as well as industrial and biomedical fields, providing a sustainable and efficient solution for water purification and microbial control.</p>

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Functionalized carboxymethyl cellulose/polyethyleneimine nanocomposite with silver nanoparticles for enhanced dye adsorption and antimicrobial properties

  • 期刊论文

  • 发表日期：

    2025年7月25日

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  • Zeineb Hamden,
  • Hussain Alenezi,
  • Jehan S. Albrahim,
  • Ahmed K. Saleh

摘要

The current study demonstrated a novel nanocomposite conducted with carboxymethyl cellulose (CMC)/polyethyleneimine (PEI) hydrogel decorated with silver nanoparticles (Ag-NPs) (CMC/PEI/Ag-NPs) was synthesized to improve the removal efficiency of anionic dyes from aqueous solutions. The resulting CMC/PEI/Ag-NPs nanocomposite was characterized through infrared spectroscopy, scanning electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, and X-ray photoelectron spectroscopy to confirm successful Ag-NPs incorporation with the CMC/PEI/Ag-NPs. The TEM images reveal that the Ag-NPs within the CMC/PEI matrix have an average diameter of approximately 100 nm​. The instrumental analysis confirms the successful synthesis of CMC/PEI/Ag-NPs nanocomposite, highlighting the chemical interaction between CMC, PEI, and Ag-NPs. Batch adsorption experiments assessed the capacity of the composite to adsorb methyl orange (MO) under varying parameters conditions. Under optimal conditions including pH 3, an incubation time of 100 min, a dye concentration of 500 mg/L, and a reaction temperature of 45 °C, the CMC/PEI/Ag-NPs nanocomposite demonstrated outstanding adsorption performance, achieving a maximum adsorption capacity of 286 mg/g. The adsorption process was well described by the Langmuir isotherm and followed a pseudo-second-order kinetic model. The reusability of the CMC/PEI/Ag-NPs nanocomposite was evaluated, and the results demonstrated that after five adsorption–desorption cycles, its adsorption capacity remained at 66 mg/g for MO. These findings confirm its effectiveness and durability for repeated use in the adsorption of anionic dyes. Compared to CMC/PEI, the CMC/PEI/Ag-NPs nanocomposite has excellent and more efficient sterilization efficacy against Escherichia coli (13 ± 0.93 mm), Salmonella typhimurium (11 ± 0.85 mm), Pseudomonas aeruginosa (12 ± 0.55 mm), Staphylococcus aureus (15 ± 1.02 mm), Streptococcus mutans (18 ± 1.14 mm), and Candida albicans (16 ± 1.23 mm). These findings suggest that the CMC/PEI/Ag-NPs nanocomposite holds promise for applications in wastewater treatment, as well as industrial and biomedical fields, providing a sustainable and efficient solution for water purification and microbial control.