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Munirathnam R, Seenappa L, Manjunatha HCS, Vidya YS, Sridhar KN, Manjunath S, Veera Rethina Murugan S, Nagaiah N. Synthesis and characterization of Ag-doped cerium oxide nanoparticles for electromagnetic radiation shielding. Radiat Prot Dosimetry 2023; 199:2513-2519. [PMID: 38126859 DOI: 10.1093/rpd/ncad221] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2023] [Revised: 05/10/2023] [Accepted: 06/15/2023] [Indexed: 12/23/2023]
Abstract
In the current study, CeO2: Ag (0 and 11 mol) nanoparticles (NPs) were synthesized by solution combustion method using Aloevera extract as reducing agent. As-obtained NPs were characterized by standard techniques. Bragg's reflections confirm the formation of a single-phase cubic structure of CeO2:Ag NPs. Crystalline size is calculated using both the W-H plot and Scherrer's equation. Crystallite size found to decrease with increase in the dopant concentration. EDAX pattern confirmed the presence of Ce, O and Ag. Direct energy band calculated using Wood and Tauc's was found to be in the range of 2.9-2.2 eV for 0 and 11 mol, respectively. Fourier transformation infrared spectroscopy (FTIR) analysis confirmed the presence of the functional groups. Total shielding efficiency (SET) will give the best representation of EMI shielding properties. SET values calculated for a wide range of wavelengths are found to be as follows: near infrared (1.65 × 102 dB), mid infrared (9.78 × 101 dB) and far infrared (6.32 × 101 dB), followed by microwave region (MW) (6.46 × 101 dB), ultra-high frequency (UHF) (7.31 × 101 dB), very high frequency (VHF) (8.27 × 101 dB), high frequency (HF) (9.26 × 101 dB), medium frequency (MF) (1.02 × 102 dB), low frequency (LW) (1.12 × 102 dB), very low frequency (VLF) (1.22 × 102 dB), ultra-low frequency (ULF) (1.42 × 102 dB) and extremely low frequency (ELF) (1.52 × 102 dB). SET values of CeO2:Ag NPs are compared with other traditional materials and nanocomposites and found to be potential use in EMI shielding applications.
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Affiliation(s)
- Rajachari Munirathnam
- Department of Physics, Rajah Serfoji Government College (Autonomous), Thanjavur, Tamil Nadu 613005, India
- Department of Physics, Government College for Women, Kolar, Karnataka 563101, India
| | - Lakshmaiah Seenappa
- Department of Physics, Government College for Women, Kolar, Karnataka 563101, India
| | | | - Yalekadakalu Shivanna Vidya
- Department of Physics, Lal Bahadur Shastri Government First Grade College, RT Nagar, Bengaluru, Karnataka 560032, India
| | | | - Shivanna Manjunath
- Department of Chemistry, B.M.S. College of Engineering, Bengaluru, Karnataka 560019, India
| | | | - Ningaiah Nagaiah
- Department of Physics, Bangalore University, Bengaluru, Karnataka 560056, India
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Munirathnam R, Seenappa L, Manjunatha HCS, Vidya YS, Sridhar KN, Murugan SVR, Manjunatha S. Synthesis and characterisation of Zn-doped cerium oxide nanoparticles for electromagnetic radiation shielding. Radiat Prot Dosimetry 2023; 199:2455-2463. [PMID: 38126857 DOI: 10.1093/rpd/ncad250] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2023] [Revised: 05/10/2023] [Accepted: 06/10/2023] [Indexed: 12/23/2023]
Abstract
CeO2-NPs (nanoparticles) exhibit a variety of properties, which have prompted researchers to explore various applications, such as gas sensing, biomedical, Electromagnetic Interference (EMI) shielding, etc. Zn-doped CeO2-NPs with concentrations ranging from 7 to 11 mol were synthesised using Aloe vera extract as a reducing agent by the solution combustion method. As obtained, NPs were characterised by standard techniques. Braggs reflections confirm the formation of a single-phase cubic structure of CeO2Zn NPs. Crystalline size is calculated using both the W-H plot and the Scherrer equation, which were found to be 12 and 9 nm, respectively. The Energy-dispersive X-ray analysis (EDAX) pattern confirmed the presence of Ce, O and Zn. The direct energy band values are found to be decreasing from 3 to 2.87 eV with an increase in the doping concentration of Zn from 7 to 11 mol. Total shielding efficiency (SET) will give the best representation of shielding properties. The SEt values of CeO2Zn NPs are compared to those of other conventional materials and NP materials, finding significant applications in EMI shielding.
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Affiliation(s)
- Rajachari Munirathnam
- Department of Physics, Rajah Serfoji Government College (Autonomous), Thanjavur, Tamil Nadu 613005, India
- Department of Physics, Government College for Women, Kolar, Karnataka 563101, India
| | - Lakshmaiah Seenappa
- Department of Physics, Government First Grade College, Mulabagal-563131 Karnataka, India
| | | | | | | | | | - Shivanna Manjunatha
- Department of Chemistry, B.M.S. College of Engineering, Bengaluru, Karnataka 560019, India
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