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Green synthesis of calcium oxide nanoparticles at different calcination temperatures

Sofiya Bano (Department of Nanotechnology, Christian College of Engineering and Technology, Bhilai, India)
Sandhya Pillai (Department of Nanotechnology, Christian College of Engineering and Technology, Bhilai, India)

World Journal of Science, Technology and Sustainable Development

ISSN: 2042-5945

Article publication date: 20 May 2020

Issue publication date: 16 July 2020

Abstract

Purpose

The purpose of this paper is to prepare calcium oxide (CaO) nanoparticles by green synthesis technique and study its structural, morphological and optical properties. The prepared samples were calcined at, 200°C, 300°C and 500°C, and the variation in the properties at different temperatures were investigated.

Design/methodology/approach

Green approach has been used in the present work to synthesise the CaO nanoparticles using Murraya Koenigii leaf (curry leaves) extract as a capping agent. This technique involves the use of nontoxic reagents and natural products derived from various parts of plants.

Findings

Studies reveal that CaO nanoparticles with good optical properties can be synthesized successfully by green approach. The optical absorbance spectra show a broad absorption peak around 400–500 nm. FTIR studies confirm the presence of different functional groups that help in the stabilization of CaO nanoparticles. PL emission spectra show a high intensity emission peak at around 231 nm in addition to peaks at 375 nm and 400 nm. XRD studies show planes of CaO cubic phase. SEM images show a nonuniform distribution of spherical particles along with some clusters. EDX spectra confirm the presence of calcium and oxygen.

Practical implications

CaO nanoparticles have wide applications in optical devices as well as in phototherapy. It is thus interesting to devise new and eco-friendly techniques to synthesise these nanoparticles to suit these applications.

Originality/value

This work would provide a new insight into the preparation of different metal oxide nanoparticles by a very simple and cost-effective green technique without the use of toxic reagents.

Keywords

Acknowledgements

The authors are grateful to Chhattisgarh Swami Vivekanand Technical University Bhilai for funding the Collaborative Research Project of which this work is a part of. The authors are also thankful to Mr. Suresh Dua, Mr. Vinod Kumar Ingole of NIT Raipur for XRD, SEM /EDX studies, Dr. D.P. Bisen and Dr. Nameeta Brahme of Pandit Ravishankar University Raipur for PL Studies and Prof MK Deb of National Center for Natural Resources, Pandit Ravishankar University Raipur for FTIR studies.

Citation

Bano, S. and Pillai, S. (2020), "Green synthesis of calcium oxide nanoparticles at different calcination temperatures", World Journal of Science, Technology and Sustainable Development, Vol. 17 No. 3, pp. 283-295. https://doi.org/10.1108/WJSTSD-12-2019-0087

Publisher

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Emerald Publishing Limited

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