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Investigation of Structural and Optical Characteristics of CuO Nanoparticles Calcinated at Various Temperatures


Affiliations
1 Department of Physics, COBS & H, CCS Haryana Agricultural University, Hisar 125 004, India
2 Department of Chemistry, COBS & H CCS Haryana Agricultural University, Hisar 125 004, India
3 Nanoscience Laboratory, Institute Instrumentation Centre, Indian Institute of Technology, Roorkee 247 667, India
 

Copper oxide nanoparticles (CuO) have been synthesized by utilizing a precipitation approach with copper nitrate (Cu(NO3)2.3H2O) as a precursor and sodium hydroxide as a stabilizing agent at different calcination temperatures i.e. 400, 600, and 800°C. X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier Transform Infrared Spectroscopy (FTIR), UV-Visible spectroscopy (UV-Vis), and photoluminescence spectroscopy (PL) were used to look at the sample’s different characteristics. The XRD analysis show that copper oxide nanoparticles have a monoclinic structure with crystallite sizes increasing with increasing calcination temperature up to 600°C, then decreased at 800°C. Also, with increasing temperature, XRD peaks were observed to become sharper, indicating better crystallinity of the samples. FE-SEM image show that synthesized CuO exhibit a flake-like structure, but on calcination it attained a regular particle like structure. The band gap of the material increased as the crystallite size of the material decreased. Photoluminescence intensity was observed to increase with temperature up-to 600°C and then decreased at 800°C. The temperature at which copper oxide nanoparticles were calcined demonstrated to have a considerable impact on their structural and optical properties. The synthesized copper oxide nanoparticles may be employed in the field of electronics in making transistors, heterojunctions, diodes etc. in optoelectronics devices like solar cells, light emitting diodes and in environmental protection for developing gas sensors.

Keywords

Band gap, Calcination, Copper oxide, Optical properties, XRD
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Abstract Views: 84

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  • Investigation of Structural and Optical Characteristics of CuO Nanoparticles Calcinated at Various Temperatures

Abstract Views: 84  |  PDF Views: 61

Authors

Smriti Sihag
Department of Physics, COBS & H, CCS Haryana Agricultural University, Hisar 125 004, India
Rita Dahiya
Department of Physics, COBS & H, CCS Haryana Agricultural University, Hisar 125 004, India
Suman Rani
Department of Physics, COBS & H, CCS Haryana Agricultural University, Hisar 125 004, India
Anushree
Department of Chemistry, COBS & H CCS Haryana Agricultural University, Hisar 125 004, India
Ashvani Kumar
Nanoscience Laboratory, Institute Instrumentation Centre, Indian Institute of Technology, Roorkee 247 667, India
Vinay Kumar
Department of Physics, COBS & H, CCS Haryana Agricultural University, Hisar 125 004, India

Abstract


Copper oxide nanoparticles (CuO) have been synthesized by utilizing a precipitation approach with copper nitrate (Cu(NO3)2.3H2O) as a precursor and sodium hydroxide as a stabilizing agent at different calcination temperatures i.e. 400, 600, and 800°C. X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier Transform Infrared Spectroscopy (FTIR), UV-Visible spectroscopy (UV-Vis), and photoluminescence spectroscopy (PL) were used to look at the sample’s different characteristics. The XRD analysis show that copper oxide nanoparticles have a monoclinic structure with crystallite sizes increasing with increasing calcination temperature up to 600°C, then decreased at 800°C. Also, with increasing temperature, XRD peaks were observed to become sharper, indicating better crystallinity of the samples. FE-SEM image show that synthesized CuO exhibit a flake-like structure, but on calcination it attained a regular particle like structure. The band gap of the material increased as the crystallite size of the material decreased. Photoluminescence intensity was observed to increase with temperature up-to 600°C and then decreased at 800°C. The temperature at which copper oxide nanoparticles were calcined demonstrated to have a considerable impact on their structural and optical properties. The synthesized copper oxide nanoparticles may be employed in the field of electronics in making transistors, heterojunctions, diodes etc. in optoelectronics devices like solar cells, light emitting diodes and in environmental protection for developing gas sensors.

Keywords


Band gap, Calcination, Copper oxide, Optical properties, XRD

References