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Calcium oxide (CaO) is a promising material that works as a glass constituent, catalyst, toxic-waste remediation, poisonous gas absorbent, industrial refectory element for metal smelting, paper bleaching, sulfur neutralization in sugar, cosmetics and drug delivery mediator. This work proposes the synthesis of CaO nanoparticles by direct precipitation technique using an aqueous solution of calcium chloride and sodium hydroxide precursors. The synthesized nanoparticles are characterized for the structure, morphology, chemical composition and optical behavior using Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), field effect scanning electron microscopy (FE-SEM), energy dispersive X-ray spectroscopy (EDS), and diffuse reflectance spectroscopy. The XRD results show that the CaO nanoparticles have been synthesized in a cubic crystalline structure with the average crystallite size of about 13 nm and display aggregated morphology of nanoclusters. The presence of distinct peaks in the FTIR and EDS spectra reveal that the nanoparticles are successfully formed from the chemical recipe of the precipitation process. The optical bandgap has been estimated from the Kubelka-Munk plot and found to be 3.48 eV. The antibacterial activity of CaO nanoparticles has been tested by the well diffusion technique and observed that it shows good antibacterial action against the gram-negative bacterial strains.


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Structural, Optical and Antibacterial Response of CaO Nanoparticles Synthesized via Direct Precipitation Technique

Show Author's information Suresh Kumar1,2Vandana Sharma1Jatindra Kumar Pradhan3Sanjay Kumar Sharma4Prem Singh5Jatinder Kumar Sharma1( )
Department of Physics, MMEC, Maharishi Markandeshwar (Deemed to be University), Mullana, 133207, Haryana, India
Department of Physics, Maharishi Markandeshwar University - Sadopur, Ambala, 134007, Haryana, India
Department of Zoology, Department of Zoology, Kalahandi University, Kalahandi, 766001, Odisha, India
School of ICT, Gautam Buddha University, Greater Noida, 201308, Uttar Pradesh, India
S.D. College, Ambala Cantt., 133001, Haryana, India

Abstract

Calcium oxide (CaO) is a promising material that works as a glass constituent, catalyst, toxic-waste remediation, poisonous gas absorbent, industrial refectory element for metal smelting, paper bleaching, sulfur neutralization in sugar, cosmetics and drug delivery mediator. This work proposes the synthesis of CaO nanoparticles by direct precipitation technique using an aqueous solution of calcium chloride and sodium hydroxide precursors. The synthesized nanoparticles are characterized for the structure, morphology, chemical composition and optical behavior using Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), field effect scanning electron microscopy (FE-SEM), energy dispersive X-ray spectroscopy (EDS), and diffuse reflectance spectroscopy. The XRD results show that the CaO nanoparticles have been synthesized in a cubic crystalline structure with the average crystallite size of about 13 nm and display aggregated morphology of nanoclusters. The presence of distinct peaks in the FTIR and EDS spectra reveal that the nanoparticles are successfully formed from the chemical recipe of the precipitation process. The optical bandgap has been estimated from the Kubelka-Munk plot and found to be 3.48 eV. The antibacterial activity of CaO nanoparticles has been tested by the well diffusion technique and observed that it shows good antibacterial action against the gram-negative bacterial strains.

Keywords: Optical properties, XRD, Antibacterial activity, CaO nanoparticles, FTIR

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Publication history

Received: 14 December 2020
Accepted: 30 June 2021
Published: 18 May 2021
Issue date: June 2021

Copyright

© Suresh Kumar, Vandana Sharma, Jatindra Kumar Pradhan, Sanjay Kumar Sharma, Prem Singh, and Jatinder Kumar Sharma.

Acknowledgements

We are very much thankful to SAIF, Chandigarh and Maharishi Markandeshwar (Deemed to be University) - Mullana for various instrumentation and test facilities.

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This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

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