Spectroscopic analysis of Cu doped and starch capped ZnS nanocrystals synthesized by microwave irradiation

B. Lalitha Devi; Akshayakumar Kompa; K. Mohan Rao; D. Ramananda

doi:10.1016/j.ceramint.2023.12.204

Spectroscopic analysis of Cu doped and starch capped ZnS nanocrystals synthesized by microwave irradiation

B. Lalitha Devi
, Akshayakumar Kompa
, K. Mohan Rao^*
, D. Ramananda

^*Corresponding author for this work

Manipal Institute of Technology, Manipal

Research output: Contribution to journal › Article › peer-review

8 Citations (Scopus)

Abstract

The synthesis of undoped and copper doped ZnS nanoparticles (NPs) by a facile starch mediated microwave assisted hydrothermal route is reported in this work. Polycrystalline, cubic ZnS nanostructure of the samples were revealed by X-ray diffraction studies. High resolution transmission electron microscopy (HRTEM) analysis revealed the crystalline nature of NPs with size distribution in 2–7 nm range. Analysis of X-ray emission induced by particles of samples indicated presence of copper content in the sample. Cu doping showed a strong influence on the green emission properties of the ZnS NPs under UV light illumination. The band gap values determined from UV–Vis absorption studies were higher than that for bulk ZnS (3.68 eV), confirming quantum confinement effect. Further, starch capping and Cu doping confirmed by Fourier transform infra-red (FTIR) spectra. A strong PL emission around 507 nm observed due to carrier transition from conduction band of ZnS to Cu²⁺ t₂ level. The intensity of this peak reduced at high dopant concentration due to quenching.

Original language	English
Pages (from-to)	8890-8895
Number of pages	6
Journal	Ceramics International
Volume	50
Issue number	6
DOIs	https://doi.org/10.1016/j.ceramint.2023.12.204
Publication status	Accepted/In press - 2023

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Process Chemistry and Technology
Surfaces, Coatings and Films
Materials Chemistry

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10.1016/j.ceramint.2023.12.204

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title = "Spectroscopic analysis of Cu doped and starch capped ZnS nanocrystals synthesized by microwave irradiation",

abstract = "The synthesis of undoped and copper doped ZnS nanoparticles (NPs) by a facile starch mediated microwave assisted hydrothermal route is reported in this work. Polycrystalline, cubic ZnS nanostructure of the samples were revealed by X-ray diffraction studies. High resolution transmission electron microscopy (HRTEM) analysis revealed the crystalline nature of NPs with size distribution in 2–7 nm range. Analysis of X-ray emission induced by particles of samples indicated presence of copper content in the sample. Cu doping showed a strong influence on the green emission properties of the ZnS NPs under UV light illumination. The band gap values determined from UV–Vis absorption studies were higher than that for bulk ZnS (3.68 eV), confirming quantum confinement effect. Further, starch capping and Cu doping confirmed by Fourier transform infra-red (FTIR) spectra. A strong PL emission around 507 nm observed due to carrier transition from conduction band of ZnS to Cu2+ t2 level. The intensity of this peak reduced at high dopant concentration due to quenching.",

author = "Devi, \{B. Lalitha\} and Akshayakumar Kompa and Rao, \{K. Mohan\} and D. Ramananda",

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year = "2023",

doi = "10.1016/j.ceramint.2023.12.204",

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T1 - Spectroscopic analysis of Cu doped and starch capped ZnS nanocrystals synthesized by microwave irradiation

AU - Devi, B. Lalitha

AU - Kompa, Akshayakumar

AU - Rao, K. Mohan

AU - Ramananda, D.

PY - 2023

Y1 - 2023

N2 - The synthesis of undoped and copper doped ZnS nanoparticles (NPs) by a facile starch mediated microwave assisted hydrothermal route is reported in this work. Polycrystalline, cubic ZnS nanostructure of the samples were revealed by X-ray diffraction studies. High resolution transmission electron microscopy (HRTEM) analysis revealed the crystalline nature of NPs with size distribution in 2–7 nm range. Analysis of X-ray emission induced by particles of samples indicated presence of copper content in the sample. Cu doping showed a strong influence on the green emission properties of the ZnS NPs under UV light illumination. The band gap values determined from UV–Vis absorption studies were higher than that for bulk ZnS (3.68 eV), confirming quantum confinement effect. Further, starch capping and Cu doping confirmed by Fourier transform infra-red (FTIR) spectra. A strong PL emission around 507 nm observed due to carrier transition from conduction band of ZnS to Cu2+ t2 level. The intensity of this peak reduced at high dopant concentration due to quenching.

AB - The synthesis of undoped and copper doped ZnS nanoparticles (NPs) by a facile starch mediated microwave assisted hydrothermal route is reported in this work. Polycrystalline, cubic ZnS nanostructure of the samples were revealed by X-ray diffraction studies. High resolution transmission electron microscopy (HRTEM) analysis revealed the crystalline nature of NPs with size distribution in 2–7 nm range. Analysis of X-ray emission induced by particles of samples indicated presence of copper content in the sample. Cu doping showed a strong influence on the green emission properties of the ZnS NPs under UV light illumination. The band gap values determined from UV–Vis absorption studies were higher than that for bulk ZnS (3.68 eV), confirming quantum confinement effect. Further, starch capping and Cu doping confirmed by Fourier transform infra-red (FTIR) spectra. A strong PL emission around 507 nm observed due to carrier transition from conduction band of ZnS to Cu2+ t2 level. The intensity of this peak reduced at high dopant concentration due to quenching.

UR - https://www.scopus.com/pages/publications/85180558625

UR - https://www.scopus.com/pages/publications/85180558625#tab=citedBy

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DO - 10.1016/j.ceramint.2023.12.204

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SN - 0272-8842

VL - 50

SP - 8890

EP - 8895

JO - Ceramics International

JF - Ceramics International

IS - 6

ER -

Spectroscopic analysis of Cu doped and starch capped ZnS nanocrystals synthesized by microwave irradiation

Abstract

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