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<p>This study presented the synthesis of cerium dioxide (CeO<sub>2</sub>) nanoparticles utilizing carboxymethyl chitosan (CMC) to augment their biocompatibility with subsequent silver doping to refine their properties. The undoped CeO<sub>2</sub> nanoparticles were characterized as a cubic fluorite crystal structure with an average particle size of approximately 17.5&#xa0;nm. The undoped CeO<sub>2</sub> nanoparticles preserved the cubic fluorite crystal structure and spherical morphology of the nanoparticles; however, it induced modifications in their physical properties, including a reduction in particle size and unit cell volume and an expansion of lattice spacing. Cytotoxicity assays revealed that undoped CeO<sub>2</sub> nanoparticles did not exhibit cytotoxic effects on HaCaT cells within the defined concentration range, indicating that CeO<sub>2</sub> nanoparticles synthesized with CMC significantly enhanced their biocompatibility. The silver-doped CeO<sub>2</sub> nanoparticles demonstrated enhanced antioxidant activity and an elevated sun protection factor (SPF) compared to their undoped counterparts. The enhancement of these properties highlights their potential applications in biomedicine and cosmetics.</p>

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Green synthesis of Ag-doped CeO2 nanoparticles with carboxymethyl chitosan: characterization, UV protection, & antioxidant effects

  • 期刊论文

  • 发表日期：

    2025年2月21日

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  • Huimin Liu,
  • Junjie Yan,
  • Zhiwei Zhao,
  • Yun Zhang,
  • Xiaoyi Wang,
  • Huimin Liu,
  • Qinglei Liu,
  • Wei Wang

摘要

This study presented the synthesis of cerium dioxide (CeO2) nanoparticles utilizing carboxymethyl chitosan (CMC) to augment their biocompatibility with subsequent silver doping to refine their properties. The undoped CeO2 nanoparticles were characterized as a cubic fluorite crystal structure with an average particle size of approximately 17.5 nm. The undoped CeO2 nanoparticles preserved the cubic fluorite crystal structure and spherical morphology of the nanoparticles; however, it induced modifications in their physical properties, including a reduction in particle size and unit cell volume and an expansion of lattice spacing. Cytotoxicity assays revealed that undoped CeO2 nanoparticles did not exhibit cytotoxic effects on HaCaT cells within the defined concentration range, indicating that CeO2 nanoparticles synthesized with CMC significantly enhanced their biocompatibility. The silver-doped CeO2 nanoparticles demonstrated enhanced antioxidant activity and an elevated sun protection factor (SPF) compared to their undoped counterparts. The enhancement of these properties highlights their potential applications in biomedicine and cosmetics.