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<p>In this work, NiV₂O₆ (NV) nanoparticles have been synthesized via a green, environmentally sustainable combustion route using powdered sunflower seeds as a natural fuel. This environmentally friendly method does not require hazardous reductants and high-energy chemical reactions and is consistent with the principles of green chemistry. XRD, FTIR, UV–DRS, SEM, TEM, PL, and XPS approaches were applied in the detailed characterization of the structural, optical, and morphological characteristics of the synthesized nanoparticles. XRD demonstrated that a well-crystallized orthorhombic NiV₂O₆ phase with nanoscale crystallite size was formed, and FTIR confirmed its characteristic Ni–O and V–O vibration bands. UV–DRS results showed strong visible light absorption with a band gap of 2.72&#xa0;eV. Agglomerated nanostructured sheets with homogeneous elemental distribution and polycrystallinity were proved by SEM–EDX and TEM studies. PL and XPS investigations were indicative of surface defects, oxygen vacancies, and stable oxidation states, which could effectively support charge separation. The photocatalytic performance of NV nanoparticles regarding the degradation of Rose Bengal dye under visible light was analyzed. The highest degradation efficiency (89%) of the optimized NV (1:1) composition was due to its smaller crystallite size, less electron–hole recombination, and enhanced ROS generation. The degradation mechanism was described by systematic characterization of the effects of catalyst dosage, dye concentration, pH, and scavengers. The photodegraded water was used for fenugreek seed germination as it showed no phytotoxicity after treatment, which proved the suitability for safe agricultural reuse. NV nanoparticles were also successfully employed as fluorescent dusting agents for latent fingerprint development on non-porous surfaces, yielding clear ridge patterns under UV illumination. This work provides a versatile and sustainable synthesis for NV nanomaterial for environmental remediation, agricultural sustainability, and forensics.</p> Graphical Abstract <p></p>

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Sustainable Sunflower Extract Derived NiV2O6 Nanoparticles For Environmental Remediation And Forensic Application

  • 期刊论文

  • 发表日期：

    2026年5月18日

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  • S Varun,
  • Venkatesh Gowda G R,
  • Gagana G R,
  • D M Gurudatt,
  • T. K Chaitra,
  • Poornima H Hiremat,
  • K. B Naveen,
  • N Srikantamurthy,
  • R Harini,
  • G Nagaraju

摘要

In this work, NiV₂O₆ (NV) nanoparticles have been synthesized via a green, environmentally sustainable combustion route using powdered sunflower seeds as a natural fuel. This environmentally friendly method does not require hazardous reductants and high-energy chemical reactions and is consistent with the principles of green chemistry. XRD, FTIR, UV–DRS, SEM, TEM, PL, and XPS approaches were applied in the detailed characterization of the structural, optical, and morphological characteristics of the synthesized nanoparticles. XRD demonstrated that a well-crystallized orthorhombic NiV₂O₆ phase with nanoscale crystallite size was formed, and FTIR confirmed its characteristic Ni–O and V–O vibration bands. UV–DRS results showed strong visible light absorption with a band gap of 2.72 eV. Agglomerated nanostructured sheets with homogeneous elemental distribution and polycrystallinity were proved by SEM–EDX and TEM studies. PL and XPS investigations were indicative of surface defects, oxygen vacancies, and stable oxidation states, which could effectively support charge separation. The photocatalytic performance of NV nanoparticles regarding the degradation of Rose Bengal dye under visible light was analyzed. The highest degradation efficiency (89%) of the optimized NV (1:1) composition was due to its smaller crystallite size, less electron–hole recombination, and enhanced ROS generation. The degradation mechanism was described by systematic characterization of the effects of catalyst dosage, dye concentration, pH, and scavengers. The photodegraded water was used for fenugreek seed germination as it showed no phytotoxicity after treatment, which proved the suitability for safe agricultural reuse. NV nanoparticles were also successfully employed as fluorescent dusting agents for latent fingerprint development on non-porous surfaces, yielding clear ridge patterns under UV illumination. This work provides a versatile and sustainable synthesis for NV nanomaterial for environmental remediation, agricultural sustainability, and forensics.

Graphical Abstract