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<p>Nickel oxide nanoparticles (NiO NPs) were synthesized <i>via</i> a green, sustainable process using <i>Cydonia oblonga</i> seed mucilage, glucuronoxylan (GX) as natural reducing and stabilizing agents. The resultant NiO NPs exhibited intense UV-Visible absorbance at 320&#xa0;nm and a band gap of 3.8&#xa0;eV, confirming the semiconductor nature of NiO NPs. Structural characterizations indicated a face-centered cubic crystalline structure with an average crystallite size of 12.48&#xa0;nm. The NiO NPs exhibited strong antibacterial activity with the highest zone of inhibition (ZOI) against <i>Bacillus licheniformis</i> (19.6&#xa0;mm) along with significant antibiofilm properties. The low MIC (10–20 <i>µ</i>g/mL) and MBC (15–30 <i>µ</i>g/mL) values indicated bactericidal activity of NiO NPs against all bacterial strains. The NiO NPs showed excellent photocatalytic degradation of methylene blue (MB), achieving 78% dye removal under sunlight within 120&#xa0;min. In addition, NPs detected heavy metals such as Pb<sup>2+</sup> and Fe<sup>2+</sup> by exhibiting distinct shifts in UV-visible spectra and increased absorbance. The current research demonstrates the versatility of NiO NPs in antimicrobial therapy, pollutant degradation, and wastewater monitoring.</p> Graphical abstract <p></p>

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Quince seed-derived glucuronoxylan-capped nickel oxide nanoparticles for antibacterial, antibiofilm, photocatalytic, and pollutant sensing applications

  • 期刊论文

  • 发表日期：

    2026年4月11日

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  • Zain Fatima,
  • Seerat Fatima,
  • Zarfishan Zulfiqar,
  • Sehar Javed,
  • Aamna Majeed,
  • Gulzar Muhammad,
  • Mohammad A. Jafar Mazumder

摘要

Nickel oxide nanoparticles (NiO NPs) were synthesized via a green, sustainable process using Cydonia oblonga seed mucilage, glucuronoxylan (GX) as natural reducing and stabilizing agents. The resultant NiO NPs exhibited intense UV-Visible absorbance at 320 nm and a band gap of 3.8 eV, confirming the semiconductor nature of NiO NPs. Structural characterizations indicated a face-centered cubic crystalline structure with an average crystallite size of 12.48 nm. The NiO NPs exhibited strong antibacterial activity with the highest zone of inhibition (ZOI) against Bacillus licheniformis (19.6 mm) along with significant antibiofilm properties. The low MIC (10–20 µg/mL) and MBC (15–30 µg/mL) values indicated bactericidal activity of NiO NPs against all bacterial strains. The NiO NPs showed excellent photocatalytic degradation of methylene blue (MB), achieving 78% dye removal under sunlight within 120 min. In addition, NPs detected heavy metals such as Pb2+ and Fe2+ by exhibiting distinct shifts in UV-visible spectra and increased absorbance. The current research demonstrates the versatility of NiO NPs in antimicrobial therapy, pollutant degradation, and wastewater monitoring.

Graphical abstract