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Abstract <p>This paper presents a green leaves extraction technique for producing nickel oxide nanoparticles from Psidium Guajava leaves extract that is both economical and environmentally benign. Nickel nitrate is used in a reduction process to achieve the green synthesis of NiO NPs. By influencing the variation in annealing calefactions, this tactic helps to lessen the antimicrobial property. Scanning electron microscopy (SEM), energy dispersive X-ray (EDAX), Fourier transform infrared (FT-IR), UV-vis spectroscopy, and X-ray diffraction (XRD) are utilized to characterize the NiO NPs obtained. The XRD pattern showed that the crystalline nature as a cubic of the produced samples varied between 300 and 700°C. The bandgap of NiO NPs was insistent from the UV-vis absorbance spectrum, and it was found to be between 3.6–4 eV. SEM images were used to determine the shaped morphology as the nanoplatelets. Experiments were carried out to investigate the ZOI of the antibacterial activity of green-produced NiO NPs against Serratia marcescens, Aspergillus niger and Bacillus cereus. The efficiency was found to be in the order of (300°C) NiO &gt; (500°C) NiO&#xa0;&gt; (700°C) NiO. Thus, its application may be advantageous for biomedical treatment.</p>

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Influence of Annealing Calefactions on Nickel Oxide Nanoparticles Bio-Fabricated Using Psidium guajava Leaves Extract: In-Vitro Antimicrobial Features

  • 期刊论文

  • 发表日期：

    2025年9月14日

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  • Monisha Ganesan,
  • Ambrose Rejo Jeice,
  • Prammitha Rajaram

摘要

Abstract

This paper presents a green leaves extraction technique for producing nickel oxide nanoparticles from Psidium Guajava leaves extract that is both economical and environmentally benign. Nickel nitrate is used in a reduction process to achieve the green synthesis of NiO NPs. By influencing the variation in annealing calefactions, this tactic helps to lessen the antimicrobial property. Scanning electron microscopy (SEM), energy dispersive X-ray (EDAX), Fourier transform infrared (FT-IR), UV-vis spectroscopy, and X-ray diffraction (XRD) are utilized to characterize the NiO NPs obtained. The XRD pattern showed that the crystalline nature as a cubic of the produced samples varied between 300 and 700°C. The bandgap of NiO NPs was insistent from the UV-vis absorbance spectrum, and it was found to be between 3.6–4 eV. SEM images were used to determine the shaped morphology as the nanoplatelets. Experiments were carried out to investigate the ZOI of the antibacterial activity of green-produced NiO NPs against Serratia marcescens, Aspergillus niger and Bacillus cereus. The efficiency was found to be in the order of (300°C) NiO > (500°C) NiO > (700°C) NiO. Thus, its application may be advantageous for biomedical treatment.