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<p>Semiconductor-based photocatalytic materials have emerged as&#xa0;promising&#xa0;materials&#xa0;for sustainable energy and environmental remediation. Amongst these, one-dimensional (1D) titanium dioxide (TiO<sub>2</sub>) has gathered significant interest due to its chemical stability and excellent photocatalytic activity. However, its wide band gap cannot provide the necessary outcomes. To overcome these challenges, heterostructures of TiO<sub>2</sub> with tungsten trioxide (WO<sub>3</sub>) are synthesised. The use of composite material achieves superior performance due to the combined action of the two components, which enhances the photocatalytic response. In this work, the hydrothermal treatment assisted by sol–gel is used to synthesise the heterostructure of TiO<sub>2</sub>–WO<sub>3</sub>. The heterostructures are physically characterised using X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray photon spectroscopy (XPS), and UV–Vis spectroscopy to investigate their characteristics. The high-resolution SEM pictures show the spherical nanoparticles (NPs) with high aggregation. The XRD patterns confirmed the crystalline structure of TiO<sub>2</sub> and WO<sub>3</sub> in the heterostructure that was annealed at 500&#xa0;°C. Based on the obtained results, heterostructures have a better photocatalytic efficacy than pristine TiO<sub>2</sub>. The heterostructures degraded 80% of methylene blue (MB) in 90&#xa0;min, whereas pristine TiO<sub>2</sub> degraded 50% in the same time.</p>

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Enhanced photocatalytic activity of TiO2/WO3 heterostructure for photodegradation of pollutants under visible light

  • 期刊论文

  • 发表日期：

    2026年8月4日

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  • Anshuman Dobhal,
  • Himadri Tripathi,
  • Abhishek Negi,
  • Ritesh Pandey,
  • Sakshi Pujari,
  • Saurabh Rawat,
  • Shivani Dangwal,
  • Divyanshi Joshi,
  • Charu Dwivedi,
  • Himani Sharma

摘要

Semiconductor-based photocatalytic materials have emerged as promising materials for sustainable energy and environmental remediation. Amongst these, one-dimensional (1D) titanium dioxide (TiO2) has gathered significant interest due to its chemical stability and excellent photocatalytic activity. However, its wide band gap cannot provide the necessary outcomes. To overcome these challenges, heterostructures of TiO2 with tungsten trioxide (WO3) are synthesised. The use of composite material achieves superior performance due to the combined action of the two components, which enhances the photocatalytic response. In this work, the hydrothermal treatment assisted by sol–gel is used to synthesise the heterostructure of TiO2–WO3. The heterostructures are physically characterised using X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray photon spectroscopy (XPS), and UV–Vis spectroscopy to investigate their characteristics. The high-resolution SEM pictures show the spherical nanoparticles (NPs) with high aggregation. The XRD patterns confirmed the crystalline structure of TiO2 and WO3 in the heterostructure that was annealed at 500 °C. Based on the obtained results, heterostructures have a better photocatalytic efficacy than pristine TiO2. The heterostructures degraded 80% of methylene blue (MB) in 90 min, whereas pristine TiO2 degraded 50% in the same time.