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<p>This study discusses the hydrothermal synthesis and reaction-time-dependent properties of nanostructured BiVO<sub>4</sub> photocatalysts. The growth of these photocatalysts took place in aqueous solutions containing bismuth nitrate pentahydrate and ammonium metavanadate precursors for varying durations (4, 6, and 8&#xa0;h). The synthesized samples were characterized using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), Raman spectroscopy, Field-emission scanning electron microscopy (FESEM), Energy-dispersive X-ray spectroscopy (EDX), and UV–Vis diffuse reflectance spectroscopy (UV–Vis DRS). The photocatalytic performance of the BiVO<sub>4</sub> samples was assessed through the degradation of methylene blue (MB) under visible-light irradiation. The photocatalytic activity showed a strong correlation with the visible-light absorption capacity. Nanostructured BiVO<sub>4</sub> photocatalysts demonstrated an increasing trend in photodegradation with shorter hydrothermal reaction times, attributed to larger particle sizes and a reduced optical bandgap. A potential photocatalytic reaction mechanism for MB degradation over nanostructured BiVO<sub>4</sub> was also discussed. This study offers a practical and efficient method for the intelligent design and controlled synthesis of a promising material for applications in photocatalysis.</p>

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Influence of reaction time on hydrothermal synthesis and visible-light-driven photocatalytic properties of BiVO4 nanostructures

  • 期刊论文

  • 发表日期：

    2025年4月26日

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  • Mohammad Yousefipour,
  • Mehdi Boroujerdnia,
  • Azadeh Haghighatzadeh

摘要

This study discusses the hydrothermal synthesis and reaction-time-dependent properties of nanostructured BiVO4 photocatalysts. The growth of these photocatalysts took place in aqueous solutions containing bismuth nitrate pentahydrate and ammonium metavanadate precursors for varying durations (4, 6, and 8 h). The synthesized samples were characterized using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), Raman spectroscopy, Field-emission scanning electron microscopy (FESEM), Energy-dispersive X-ray spectroscopy (EDX), and UV–Vis diffuse reflectance spectroscopy (UV–Vis DRS). The photocatalytic performance of the BiVO4 samples was assessed through the degradation of methylene blue (MB) under visible-light irradiation. The photocatalytic activity showed a strong correlation with the visible-light absorption capacity. Nanostructured BiVO4 photocatalysts demonstrated an increasing trend in photodegradation with shorter hydrothermal reaction times, attributed to larger particle sizes and a reduced optical bandgap. A potential photocatalytic reaction mechanism for MB degradation over nanostructured BiVO4 was also discussed. This study offers a practical and efficient method for the intelligent design and controlled synthesis of a promising material for applications in photocatalysis.