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<p>This study was to present the green synthesis of pyrite nanoparticles (FeS<sub>2</sub>-NPs) as a nanozyme using <i>Acanthophyllum laxiusculum</i> root extract. The synthesized FeS<sub>2</sub>-NPs were characterized by field emission scanning electron microscopy (FESEM), Fourier transform infrared (FTIR) spectroscopy, and X-ray diffraction (XRD). The operating parameters for the synthesis of FeS<sub>2</sub>-NPs, including surfactant concentration, temperature, time, and sulfur concentration, were investigated. The obtained results revealed that the optimal conditions for the synthesis of FeS<sub>2</sub>-NPs were 10&#xa0;mL of the <i>Acanthophyllum laxiusculum</i> root extract as the surfactant, 200&#xa0;°C temperature, and 2&#xa0;moL sodium thiosulfate (Na<sub>2</sub>S<sub>2</sub>O<sub>3</sub>) as an S source. The <i>Acanthophyllum laxiusculum</i> root extract had a significant effect on the morphology and particle size of FeS<sub>2</sub>-NPs. Moreover, the obtained results demonstrated that the synthesized nanozymes could display their maximum peroxidase-like (POD-like) activity at the temperature of 25&#xa0;°C and the pH of 4.0. The kinetic parameters, K<sub>m</sub> and V<sub>max</sub>, were subsequently determined for the synthesized nanozymes of FeS<sub>2</sub> as 0.041&#xa0;mM and 11.38 × 10<sup>–8</sup>&#xa0;M/s, respectively. In addition, high nanozyme activity was observed in the presence of isopropyl alcohol (C<sub>3</sub>H<sub>8</sub>O) and 3, 3′,5,5′ tetramethylbenzidine (TMB). Therefore, the natural surfactant of <i>Acanthophyllum laxiusculum</i> root extract could be a high-potential and eco-friendly chemical for the synthesis of FeS<sub>2</sub>-NPs.</p>

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Green synthesis of pyrite nanoparticles: nanozyme activity and kinetic studies

  • 期刊论文

  • 发表日期：

    2025年3月3日

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  • Samaneh Mirali,
  • Mohsen Heidari,
  • Mehdi Ahmadi,
  • Abbas Rezaee

摘要

This study was to present the green synthesis of pyrite nanoparticles (FeS2-NPs) as a nanozyme using Acanthophyllum laxiusculum root extract. The synthesized FeS2-NPs were characterized by field emission scanning electron microscopy (FESEM), Fourier transform infrared (FTIR) spectroscopy, and X-ray diffraction (XRD). The operating parameters for the synthesis of FeS2-NPs, including surfactant concentration, temperature, time, and sulfur concentration, were investigated. The obtained results revealed that the optimal conditions for the synthesis of FeS2-NPs were 10 mL of the Acanthophyllum laxiusculum root extract as the surfactant, 200 °C temperature, and 2 moL sodium thiosulfate (Na2S2O3) as an S source. The Acanthophyllum laxiusculum root extract had a significant effect on the morphology and particle size of FeS2-NPs. Moreover, the obtained results demonstrated that the synthesized nanozymes could display their maximum peroxidase-like (POD-like) activity at the temperature of 25 °C and the pH of 4.0. The kinetic parameters, Km and Vmax, were subsequently determined for the synthesized nanozymes of FeS2 as 0.041 mM and 11.38 × 10–8 M/s, respectively. In addition, high nanozyme activity was observed in the presence of isopropyl alcohol (C3H8O) and 3, 3′,5,5′ tetramethylbenzidine (TMB). Therefore, the natural surfactant of Acanthophyllum laxiusculum root extract could be a high-potential and eco-friendly chemical for the synthesis of FeS2-NPs.