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Research Article Open access CC BY 4.0

Morphological, Elemental and Optical, Properties of Sphalerite Nanoparticle (ZnS) Doped with Neem Leaf Extract

Chiamaka Peace Onu, Azubuike Josiah Ekpunobi, Adaora Lynda Ozobialu, Chiedozie Emmanuel Okafor, Diemiruaye Mimi Jeroh, Chukwudi Benjamin Muomeliri, Okechukwu Emmanuel Odikpo, Augustine Chukwuemeka Azubogu, Evangeline Njideka Onuigbo, Overcomer Ifeanyi Anusiuba, Adline Nwodo, Nonso Livinus Okoli, Uche Eunice Ekpunobi

Asian Journal of Advanced Research and Reports · pp. 439–455 · Published 31 May 2025

10.9734/ajarr/2025/v19i51029

Abstract

This study investigated the properties of undoped Sphalerite nanoparticles and Neem leaf extract doped Sphalerite nanoparticles. The Sphalerite nanoparticle were prepared by ball milling technique and was doped with the Neem leaf extract using Doctors Blades method. The Morphological, elemental and optical properties of the nanoparticles were investigated using scanning electron microscopy (SEM), energy dispersed X-ray analysis (EDX), and UV spectrophotometer respectively. The SEM micrograph revealed significant change in the morphological structure of the Sphalerite nanaoparticle from being coarse, densely packed, well-formed flakes with uneven edged crystalline-structured to coarse, dispersed, grain-like crystalline structure after doping with Neem leaf extract. The EDX confirmed the presence of zinc, sulphide, calcium, phosphorous, iron, chromium, and selenium and trace of other elements. UV-Vis spectroscopy showed that the transmittance of both the doped and undoped Sphalerite increased as the spectrum wavelength moved from ultraviolet region to visible region at 94% and 88% respectively at the near-infrared region. The photon energy with respect to refractive index of both doped and the undoped Sphalerite was found to be 1.66eV – 2.64eV and 1.38eV to 2.45eV respectively which revealed that the doped Sphalerite nanoparticle is beneficial for higher non linear optical response for optoelectronic devices. The Bang gap of the doped Sphalerite nanoparticles was 2.52eV which is significantly better than 3.63eV obtained in undoped Sphalerite. This suggested that the Neem leaf extract introduced necessary impurities which enhanced the optoelectronic properties of the Sphalerite nanoparticles. Hence, Neem leaf-doped Sphalerite nanoparticles can be a potential enhanced material for optoelectronic devices with excellent performance in photovoltaic applications.

Sphalerite nanoparticles neem leaf extract scanning electron microscopy properties

References (23)

  1. 1 Therapeutics Role of Azadirachta indica (Neem) and Their Active Constituents in Diseases Prevention and Treatment [DOI]
  2. 2 Vividly colorful hybrid perovskite solar cells by doctor-blade coating with perovskite photonic nanostructures [DOI]
  3. 3 Enhanced photocatalytic activity of Al and Fe co-doped ZnO nanorods for methylene blue degradation [DOI]
  4. 4 12.88% efficiency in doctor-blade coated organic solar cells through optimizing the surface morphology of a ZnO cathode buffer layer [DOI]
  5. 5 Structural, Optical, Magnetic and Electrical Properties of Sputtered ZnO and ZnO:Fe Thin Films: The Role of Deposition Power [DOI]
  6. 6 Iron-Doped ZnO Nanoparticles as Multifunctional Nanoplatforms for Theranostics [DOI]
  7. 7 In-doped ZnS nanoparticles: structural, morphological, optical and antibacterial properties [DOI]
  8. 8 Content of trace elements and chromium speciation in Neem powder and tea infusions [DOI]
  9. 9 Investigations on Optical and Electrical Conductivity of Ba/Ni/Zn/Fe16O27 Ferrite Nanoparticles [DOI]
  10. 10 RETRACTED: Plant-mediated synthesis of sphalerite (ZnS) quantum dots, Th1-Th2 genes expression and their biomedical applications [DOI]
  11. 11 Analysis of Structural, Optical, and Magnetic Properties of (Fe,Co) Co-Doped ZnO Nanoparticles Synthesized under UV Light [DOI]
  12. 12 Advanced characterization of membrane surface fouling [DOI]
  13. 13 Chemistry behind in neem (Azadirachta indica) as medicinal value to living forms-A review [DOI]
  14. 14 Effect of Doping and Co-sensitization on the Photovoltaic Properties of Natural Dye-sensitized Solar Cells [DOI]
  15. 15 The State of Trace Elements (In, Cu, Ag) in Sphalerite Studied by X-Ray Absorption Spectroscopy of Synthetic Minerals [DOI]
  16. 16 Optimization of Titanium Dioxide Layer Fabrication Using Doctor Blade Method in Improving Efficiency of Hybrid Solar Cells [DOI]
  17. 17 Refractive index measurement of nanoparticles by immersion refractometry based on a surface plasmon resonance sensor [DOI]
  18. 18 Preparation of metal doped nanoparticles using flower extract of Piper betle and its anti-bacterial investigations [DOI]
  19. 19 Measurement of Ultraviolet Light Transmittance of Different Contact Lens Types [DOI]
  20. 20 Optical Conductivity of Spherical Metal Nanoparticles Taking into Account the Size Dependence of the Fermi Energy [DOI]
  21. 21 SYNTHESIS AND CHARACTERIZATION OF NEEM-BASED ZINC OXIDE PHOTOCATALYST [DOI]
  22. 22 Effect of Time on the Optical and Structural Properties of Tin Oxide Thin Films as an Electron Transport Layer for Perovskite Solar Cell [DOI]
  23. 23 Effect of Blending Baobab and Neem Leaves Extract on Optical Band Gap Energy for Solar Cell Applications [DOI]

Cited by 2

Morphological, elemental and optical, properties of sphalerite nanoparticle (ZnS) doped with neem leaf extract

Peace Onu Chiamaka · i-manager's Journal on Material Science · 2025

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