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<p>The material has collective surface diffusion thermodynamically into stable nano objects because of aging which may have the capability to enhance oxidative degradation performance. Here, Barium-tungstate nanostructures are synthesized using a hydrothermal method with an aging process, employing NaWO<sub>4</sub>·2H<sub>2</sub>O and Ba(NO<sub>3</sub>)<sub>2</sub> as precursors and their photocatalytic performance have been measured. X-ray diffraction analysis confirmed the wolframite tetragonal structure. Morphological characterization via field emission scanning electron microscopy and energy-dispersive X-ray spectroscopy revealed dodecahedral shapes (average ~ 185&#xa0;nm) for non-aged samples and spherical shapes (average ~ 60&#xa0;nm) for aged samples. Optical properties, examined by UV-Vis and Fourier-transform infrared spectroscopy, showed an absorption peak at 262&#xa0;nm and a characteristic band at 788&#xa0;cm<sup>−1</sup>. Photocatalytic activity for degrading methyl orange dye under visible light was evaluated at varying pH values (2, 4, 6, 8, 10). At pH 10, degradation efficiencies were 96.96% for non-aged samples and 98.79% for aged samples, maximum activity results appeared with the aging process which enhancing performance by improving morphology and increasing active sites.</p>

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Effect of aging on morphological structure of BaWO4 nanostructure toward excellent photocatalytic performance

  • 期刊论文

  • 发表日期：

    2025年7月1日

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  • Aqsa Zafar,
  • Muhammad Sulaman,
  • Tariq Mahmood,
  • Afshan Urooj,
  • Yahya Sandali,
  • Waheed S. Khan,
  • Hafiz Muhammad Naeem Ullah,
  • Abdul Rahman,
  • Ahmad Irfan

摘要

The material has collective surface diffusion thermodynamically into stable nano objects because of aging which may have the capability to enhance oxidative degradation performance. Here, Barium-tungstate nanostructures are synthesized using a hydrothermal method with an aging process, employing NaWO4·2H2O and Ba(NO3)2 as precursors and their photocatalytic performance have been measured. X-ray diffraction analysis confirmed the wolframite tetragonal structure. Morphological characterization via field emission scanning electron microscopy and energy-dispersive X-ray spectroscopy revealed dodecahedral shapes (average ~ 185 nm) for non-aged samples and spherical shapes (average ~ 60 nm) for aged samples. Optical properties, examined by UV-Vis and Fourier-transform infrared spectroscopy, showed an absorption peak at 262 nm and a characteristic band at 788 cm−1. Photocatalytic activity for degrading methyl orange dye under visible light was evaluated at varying pH values (2, 4, 6, 8, 10). At pH 10, degradation efficiencies were 96.96% for non-aged samples and 98.79% for aged samples, maximum activity results appeared with the aging process which enhancing performance by improving morphology and increasing active sites.