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Vol. 35 No. 8 (2023): Vol 35 Issue 8, 2023

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Hydrothermal Synthesis and Micro-Structural, Optical and Luminescence Properties of Core-Shell Hetero Structure CdS/Zn3(PO4)2 Nanocomposite

https://doi.org/10.14233/ajchem.2023.28026
G. Sreedevi
Department of Physics, Prasad V. Potluri Siddhartha Institute of Technology, Vijayawada-520007, India
https://orcid.org/0000-0002-7544-1498
T. Pullarao
Department of Physics, Prasad V. Potluri Siddhartha Institute of Technology, Vijayawada-520007, India
https://orcid.org/0009-0003-6211-4898
S.K. Khaja Muswareen
Department of Physics, P.B. Siddhartha Arts & Science College, Vijayawada-520010, India
https://orcid.org/0000-0002-8361-6323
S. Suresh
Department of BS & H, Seshadri Rao Gudlavalleru Engineering College, Gudlavalleru-521356, India
https://orcid.org/0000-0003-2706-4410
P. Vijaya Sirisha
Department of Physics, Lakireddy Bali Reddy College of Engineering, Mylavaram, India
https://orcid.org/0000-0003-2040-0274
Ch. Rajyalakshmi
Department of Basic Sciences, Vishnu Institute of Technology, Bhimavaram, India
https://orcid.org/0000-0002-9037-1010
V. Jayalakshmi
Department of Physics, National Institute of Technology, Warangal-506004, India
https://orcid.org/0000-0002-5259-6286

Corresponding Author(s) : V. Jayalakshmi

vlakshmij@gmail.com

Asian Journal of Chemistry, Vol. 35 No. 8 (2023): Vol 35 Issue 8, 2023

Abstract

The hydrothermal approach was used to make an inorganic semiconducting CdS/Zn3(PO4)2 nanocomposite at a mild reaction temperature of 100 ºC. The XRD data indicate peaks that correspond to CdS hexagonal structure and Zn3(PO4)2 monoclinic-phase with good crystalline character. Surprisingly, the phase shift from α-phase of Zn3(PO4)2 to γ-phase of Zn3(PO4)2 is observed under hydrothermal conditions due to the coupling of CdS with Zn3(PO4)2, as well as internal structural alterations leading to the formation of CdS/Zn3(PO4)2 nanocomposite. Debye-Scherrer and W-H methods were used to calculate average crystallite size, lattice strain and dislocation density. The average crystal lattice is 15-25 nm in size. The hexagonal spheres aggregated on rectangular flakes, indicating core-shell heterostructure, may be seen on the surface morphology of the prepared composite. Due to the quantum size effect, the absorption peak for the composite is in the visible wavelength. It also has a low optical band gap of 2.42 eV, which makes it useful for photocatalytic and photoelectrochemical applications. FT-IR spectrum shows all the fundamental vibrational modes of CdS/Zn3(PO4)2 nanocomposite. Colour coordinate values and CCT values of the prepared composites indicate that they are used for LED applications and the photoluminescence spectrum reveals a broad, intense luminescence band in the visible region with wavelengths ranging from 510 to 518 nm, in good agreement with the absorption wavelength and the CIE diagram.

Keywords

Hydrothermal synthesis Cadmium sulphide Zinc phosphate Luminescence Nanocomposite
Sreedevi, G., Pullarao, T., Muswareen, S. K., Suresh, S., Sirisha, P. V., Rajyalakshmi, C., & Jayalakshmi, V. (2023). Hydrothermal Synthesis and Micro-Structural, Optical and Luminescence Properties of Core-Shell Hetero Structure CdS/Zn3(PO4)2 Nanocomposite. Asian Journal of Chemistry, 35(8), 1836–1842. https://doi.org/10.14233/ajchem.2023.28026
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