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Mika Erik Tapio Sillanpää

Gd3+ doped BiVO4 and visible light-emitting diodes (LED) for photocatalytic decomposition of bisphenol A, bisphenol S and bisphenol AF in water

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  • Carolina Orona-Návar, Instituto Tecnologico de Estudios Superiores de Monterrey
  • ,
  • Yuri Park, Lappeenranta University of Technology
  • ,
  • Varsha Srivastava, Lappeenranta University of Technology
  • ,
  • Netzahualpille Hernández, Instituto Tecnologico de Estudios Superiores de Monterrey
  • ,
  • Jürgen Mahlknecht, Instituto Tecnologico de Estudios Superiores de Monterrey
  • ,
  • Mika Sillanpää
  • Nancy Ornelas-Soto, Instituto Tecnologico de Estudios Superiores de Monterrey

The photocatalytic efficiency of BiVO4 was enhanced through rare-earth doping (Gd3+). The effect of different concentrations of Gd3+ was evaluated through the decomposition of bisphenol A in water. To better understand the photocatalytic properties of the synthesized photocatalysts, scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), diffuse reflectance spectroscopy (DRS), and Brunauer-Emmett-Teller (BET) method were applied. It was found that 4% of Gd3+ in molar mass showed the best photocatalytic efficiency. Decomposition of bisphenol A, bisphenol S, and bisphenol AF was studied using the photocatalyst with the optimal concentration of Gd3+, reaching decomposition percentages up to 77.02% ± 2.16, 44.36% ± 2.74%, and 74.11% ± 5.09, respectively after three hours reaction. Reactive species were identified by scavenging tests and additionally, kinetic studies were performed. A decomposition pathway was proposed for the three studied pollutants. The synthesized Gd3+ doped BiVO4 photocatalysts demonstrated to be a promising alternative for the efficient degradation of disrupting endocrine compounds such as bisphenol A analogs present in water using LED visible light as an eco-friendly irradiation source.

Original languageEnglish
Article number105842
JournalJournal of Environmental Chemical Engineering
Number of pages12
Publication statusPublished - Oct 2021

Bibliographical note

Publisher Copyright:
© 2021 Elsevier Ltd

    Research areas

  • Bisphenol A analogs, BiVO, Gd doping, Photocatalysis, Visible LED light

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