Scholarlink

<p>This study presents an environmentally friendly method for synthesizing Ag@Fe<sub>2</sub>O<sub>3</sub> nanostructures through a hydrothermal technique that utilizes <i>Saussurea obvallata</i> leaf extract as a reducing and capping agent. The material was characterized using UV–Vis, FTIR, XRD, SEM–EDX, and TEM-SAED-line profile analysis. The UV–Vis shows a maximum absorbance peak at 380&#xa0;nm, showing a band gap of 3.26&#xa0;eV. FTIR analysis revealed several functional groups (vibrational modes), including 944 and 514&#xa0;cm<sup>−1</sup> (Fe–O) and 445&#xa0;cm<sup>−1</sup> (Ag–O). XRD spectra analysis confirmed the crystalline nature and, using the Scherrer equation, showed an average crystallite size of 49.57&#xa0;nm. EDX confirmed the presence of only Ag, Fe, and O elements. SEM and TEM-SAED analyses revealed an <i>echinus</i>-like morphology with an interplanar spacing of 126&#xa0;pm of the nanostructures. The photocatalytic activity of Ag@Fe<sub>2</sub>O<sub>3</sub> was investigated through the degradation of methylene blue (MB) dye in the presence of UV–visible light irradiation. It was observed that 97.10% MB dye degradation occurred within 60&#xa0;min, with the rate constant and half-life being 0.03025&#xa0;min<sup>−1</sup> and 22.90&#xa0;min, respectively. It was deduced that the synergistic interaction of Ag with Fe<sub>2</sub>O<sub>3</sub> promoted the separation of charge, significantly diminishing electron–hole recombination. This research presents plant extract as a readily available, cost-effective, and environmentally friendly way to produce highly efficient photocatalysts for degrading wastewater dye compounds.</p> Graphical Abstract <p></p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Efficient photocatalytic methylene blue dye degradation from green-synthesized silver-doped iron oxide (Ag@Fe2O3) nanostructures

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年4月4日

查看全文
  • Vikram Jadhav,
  • Yash Dhanwate,
  • Pradnya Raut,
  • Shilpa Shinde,
  • Rajashri Sawant,
  • Arun Bhagare

摘要

This study presents an environmentally friendly method for synthesizing Ag@Fe2O3 nanostructures through a hydrothermal technique that utilizes Saussurea obvallata leaf extract as a reducing and capping agent. The material was characterized using UV–Vis, FTIR, XRD, SEM–EDX, and TEM-SAED-line profile analysis. The UV–Vis shows a maximum absorbance peak at 380 nm, showing a band gap of 3.26 eV. FTIR analysis revealed several functional groups (vibrational modes), including 944 and 514 cm−1 (Fe–O) and 445 cm−1 (Ag–O). XRD spectra analysis confirmed the crystalline nature and, using the Scherrer equation, showed an average crystallite size of 49.57 nm. EDX confirmed the presence of only Ag, Fe, and O elements. SEM and TEM-SAED analyses revealed an echinus-like morphology with an interplanar spacing of 126 pm of the nanostructures. The photocatalytic activity of Ag@Fe2O3 was investigated through the degradation of methylene blue (MB) dye in the presence of UV–visible light irradiation. It was observed that 97.10% MB dye degradation occurred within 60 min, with the rate constant and half-life being 0.03025 min−1 and 22.90 min, respectively. It was deduced that the synergistic interaction of Ag with Fe2O3 promoted the separation of charge, significantly diminishing electron–hole recombination. This research presents plant extract as a readily available, cost-effective, and environmentally friendly way to produce highly efficient photocatalysts for degrading wastewater dye compounds.

Graphical Abstract