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<p>High-purity ZrO<sub>2</sub> nanoparticles, prepared through a green and low-combustion synthesis method using coconut oil as a renewable fuel, have been developed. The eco-friendly synthesis technique is an affordable and scalable route that competes with traditional synthesis routes that require toxic precursors and high-temperature conditions. The structural, morphological, and optical properties of the synthesised ZrO<sub>2</sub> NPs were characterised by means of X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FTIR), UV-Vis diffuse reflectance spectroscopy (UV-Vis DRS), and photoluminescence (PL) analysis. XRD proved the existence of a monoclinic phase ZrO<sub>2</sub> with an average crystallite size of 21&#xa0;nm. The direct band gap value has been determined to be 3.1&#xa0;eV according to the UV-Vis DRS analysis that proves the photocatalytic potential of the material. SEM imaging revealed the surface morphology, further confirming the nanoscale features of the synthesised particles. The photocatalytic activity of ZrO<sub>2</sub> NPs was evaluated for the degradation of atrazine (ATZ), a persistent triazine herbicide, under UV light irradiation. Various experimental parameters, including catalyst dosage, atrazine concentration, pH, and the role of scavengers, were systematically investigated to understand their influence on degradation efficiency. Notably, ZrO<sub>2</sub> NPs degraded 91% of the atrazine in only 30&#xa0;min using a catalyst load of 30&#xa0;mg and an initial ATZ concentration of 5 ppm. The high degradation efficiency of the material makes it quite promising for use in environmental remediation applications. Beyond the photocatalysis application, the synthesized ZrO<sub>2</sub> NPs have demonstrated promising applicability in forensic science for latent fingerprint detection, hence showing their multi-functionality. The advantages of green synthesis, superior photocatalytic efficiency, and forensic applicability set this study apart from previous works, emphasising its novelty and potential for real-world applications.</p>

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Efficient Atrazine Degradation Via Green Synthesized Zirconia NPs: A Sustainable Approach to Water Purification

  • 期刊论文

  • 发表日期：

    2025年6月2日

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  • K. R. Pooja,
  • G. Nagaraju,
  • C. P. Prajwal Ujjani,
  • Vachanashree J. Koti,
  • K. B. Naveen,
  • R. Harini,
  • J. Manjanna,
  • C. Mallikarjunaswamy

摘要

High-purity ZrO2 nanoparticles, prepared through a green and low-combustion synthesis method using coconut oil as a renewable fuel, have been developed. The eco-friendly synthesis technique is an affordable and scalable route that competes with traditional synthesis routes that require toxic precursors and high-temperature conditions. The structural, morphological, and optical properties of the synthesised ZrO2 NPs were characterised by means of X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FTIR), UV-Vis diffuse reflectance spectroscopy (UV-Vis DRS), and photoluminescence (PL) analysis. XRD proved the existence of a monoclinic phase ZrO2 with an average crystallite size of 21 nm. The direct band gap value has been determined to be 3.1 eV according to the UV-Vis DRS analysis that proves the photocatalytic potential of the material. SEM imaging revealed the surface morphology, further confirming the nanoscale features of the synthesised particles. The photocatalytic activity of ZrO2 NPs was evaluated for the degradation of atrazine (ATZ), a persistent triazine herbicide, under UV light irradiation. Various experimental parameters, including catalyst dosage, atrazine concentration, pH, and the role of scavengers, were systematically investigated to understand their influence on degradation efficiency. Notably, ZrO2 NPs degraded 91% of the atrazine in only 30 min using a catalyst load of 30 mg and an initial ATZ concentration of 5 ppm. The high degradation efficiency of the material makes it quite promising for use in environmental remediation applications. Beyond the photocatalysis application, the synthesized ZrO2 NPs have demonstrated promising applicability in forensic science for latent fingerprint detection, hence showing their multi-functionality. The advantages of green synthesis, superior photocatalytic efficiency, and forensic applicability set this study apart from previous works, emphasising its novelty and potential for real-world applications.