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<p>In this study, silver nanoparticles (Ag NPs) are prepared through green reduction of Curcuma zedoaria rhizome essential oil (CZREO). A sharp surface plasmon resonance (SPR) band at 419&#xa0;nm obtained through UV–Visible spectroscopy confirms the formation of Ag NPs and also hints that CZREO acts as a green reducing agent. Transmission Electron Microscope (TEM) reveals crystalline Ag NPs having a spherical shape with an average size of 10.4&#xa0;nm. It is believed that terpenoids and camphor bioactive compounds are responsible for reduction reactions involved in the formation of Ag NPs. Fourier Transform Infrared Spectroscopy (FTIR) spectra of CZREO and Ag NPs suggest the encapsulation of some bioactive compounds on the surface of Ag NPs. Catalytic reduction of 4-nitrophenol (4-NP) into 4-aminophenol (4-AP) is obtained with the Ag NPs within 10&#xa0;min. Further, the role of HRTEM Ag NPs in the photocatalytic degradation of methylene blue (MB) and methyl orange (MO) is assessed under UV and sunlight. About 99.9% and 72% degradation efficacy is obtained for MB and MO, respectively, under UV light. Ag NPs showed 81.52% and 25.70% efficacy for MB and MO dyes, respectively, under sunlight. The presence of bioactive compounds like linalool and camphene at Ag NPs’ surface contributes towards the generation of hydroxyl and oxygen radicals caused by electronic transition under UV and sunlight irradiation which are responsible for the dye degradation. CZREO encapsulated Ag NPs demonstrate their potential to serve as cost-effective nano catalysts for treating wastewater and remediation to aquatic environments.</p>

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Curcuma zedoaria essential oil encapsulated silver nanocatalyst for catalytic reduction and photocatalytic degradation

  • 期刊论文

  • 发表日期：

    2025年3月17日

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  • Avinash Gangal,
  • Nadeem Akhtar,
  • Prayas Singh,
  • Samta Manori,
  • Manisha Duseja,
  • Neeraj K. Sethiya,
  • Ravi K. Shukla

摘要

In this study, silver nanoparticles (Ag NPs) are prepared through green reduction of Curcuma zedoaria rhizome essential oil (CZREO). A sharp surface plasmon resonance (SPR) band at 419 nm obtained through UV–Visible spectroscopy confirms the formation of Ag NPs and also hints that CZREO acts as a green reducing agent. Transmission Electron Microscope (TEM) reveals crystalline Ag NPs having a spherical shape with an average size of 10.4 nm. It is believed that terpenoids and camphor bioactive compounds are responsible for reduction reactions involved in the formation of Ag NPs. Fourier Transform Infrared Spectroscopy (FTIR) spectra of CZREO and Ag NPs suggest the encapsulation of some bioactive compounds on the surface of Ag NPs. Catalytic reduction of 4-nitrophenol (4-NP) into 4-aminophenol (4-AP) is obtained with the Ag NPs within 10 min. Further, the role of HRTEM Ag NPs in the photocatalytic degradation of methylene blue (MB) and methyl orange (MO) is assessed under UV and sunlight. About 99.9% and 72% degradation efficacy is obtained for MB and MO, respectively, under UV light. Ag NPs showed 81.52% and 25.70% efficacy for MB and MO dyes, respectively, under sunlight. The presence of bioactive compounds like linalool and camphene at Ag NPs’ surface contributes towards the generation of hydroxyl and oxygen radicals caused by electronic transition under UV and sunlight irradiation which are responsible for the dye degradation. CZREO encapsulated Ag NPs demonstrate their potential to serve as cost-effective nano catalysts for treating wastewater and remediation to aquatic environments.