Cerium oxide nanoparticles: sustainable synthesis and diverse applications in electrical properties, catalysis and biomedicineH. S. Lalithamba, G. K. Prashanth, H. K. E. Latha, Rashmi, Aisha Siddekha, and G. Nagendra Department of Chemistry, Siddaganga Institute of Technology, Tumakuru, India
E-mail: hsl@sit.ac.in Received: 4 August 2024 Accepted: 24 October 2024 Abstract: This study presents an innovative and environmentally friendly approach for the synthesis of cerium oxide nanoparticles (CeO₂ NPs), characterized using advanced techniques such as FTIR, XRD, SEM, TEM and XPS. Notable spectral peaks at 457 cm−1 and 1380 cm−1 confirm the successful formation of CeO₂ NPs, with an average size of 5.72 nm and a spherical morphology revealed through XRD and SEM analysis. We explored the multifaceted applications of these synthesized NPs, particularly their impressive electrical properties and catalytic capabilities. The CeO₂ NPs demonstrated a remarkable role in synthesizing sulfides from thiols and bromoesters, which were further oxidized to sulfoxides with excellent yields using m-chloroperbenzoic acid (m-CPBA). Electrical property assessments revealed that the CeO₂ NPs exhibit insulating behavior at lower frequencies while transitioning to semiconducting characteristics at higher frequencies. Furthermore, we evaluated the cytotoxicity of the CeO₂ NPs on MCF-7 human breast cancer cells, alongside tests for biocompatibility through blood hemolysis. The NPs displayed a significant DPPH radical scavenging activity with an effective concentration of 242 μg/mL, and a safe hemolytic activity at levels below 2.5 mg/mL, indicating their potential as promising candidates in biomedical applications. Keywords: CeO2 nanostructure; Electrical properties; Catalytic activity; Organo sulfur compounds; Biological activity Full paper is available at www.springerlink.com. DOI: 10.1007/s11696-024-03770-2
Chemical Papers 79 (1) 193–209 (2025) |
Wednesday, February 05, 2025 
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