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<p>This study represents the synthesis of tungsten trioxide nanoparticles via the modified thermal treatment technique utilizing PVA as a capping material at varying temperatures ranging from 500–600&#xa0;°C, aiming to investigate the fundamental morphological, structural, and optical characteristics of the resultant products for prospective applications. EDX revealed significantly elevated purity of WO<sub>3</sub> as the calcination temperature increased. FT-IR and XRD exhibited crystallinity and phase composition of the metal oxide WO<sub>3</sub>. FE-SEM images showed different morphological structures and a size increase related to treatment temperatures. Average crystallite sizes by XRD were 39&#xa0;nm at 500&#xa0;°C and 53&#xa0;nm at 600&#xa0;°C, while average particle sizes confirmed by FE-SEM were 44 and 59&#xa0;nm, respectively. UV–vis revealed increased absorbance at 300 + nm with a decreasing indirect band gap from 2.78&#xa0;eV at 500&#xa0;°C to 2.33&#xa0;eV at 600&#xa0;°C.</p>

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PVA role in synthesis of WO3 nanoparticles by the modified thermal treatment approach: structural, morphological, and optical study

  • 期刊论文

  • 发表日期：

    2026年4月21日

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  • Aysar S. Keiteb,
  • Haneen Abass Alrubaie,
  • Raneen Salam

摘要

This study represents the synthesis of tungsten trioxide nanoparticles via the modified thermal treatment technique utilizing PVA as a capping material at varying temperatures ranging from 500–600 °C, aiming to investigate the fundamental morphological, structural, and optical characteristics of the resultant products for prospective applications. EDX revealed significantly elevated purity of WO3 as the calcination temperature increased. FT-IR and XRD exhibited crystallinity and phase composition of the metal oxide WO3. FE-SEM images showed different morphological structures and a size increase related to treatment temperatures. Average crystallite sizes by XRD were 39 nm at 500 °C and 53 nm at 600 °C, while average particle sizes confirmed by FE-SEM were 44 and 59 nm, respectively. UV–vis revealed increased absorbance at 300 + nm with a decreasing indirect band gap from 2.78 eV at 500 °C to 2.33 eV at 600 °C.