Photocatalytic Degradation of Dyes Using Titania Nanoparticles Supported in Metal-Organic Materials Based on Iron

Molecules. 2022 Oct 20;27(20):7078. doi: 10.3390/molecules27207078.

Abstract

Composite materials based on titania nanoparticles (TiO2 NPs) and three metal-organic frameworks (MOFs) called MIL-53 (Fe) ((Fe (III) (OH) (1,4-BDC)), MILs (Materials Institute Lavoisier)), MIL-100 (Fe) (Fe3O(H2O)2OH(BTC)2), and Fe-BTC (iron-benzenetricarboxylate) with different percentages of TiO2 NPs (0.5, 1, and 2.5% wt.) were synthesized using the solvothermal method and used as photocatalytic materials in the degradation of two dyes (Orange II and Reactive Black 5 (RB5)). The pristine and composite materials were characterized with X-ray diffraction, Raman, UV-Vis and Fourier transform infrared spectroscopy and scanning electron microscopy techniques. The 2.5TiO2/MIL-100 composite material showed the best results for the degradation of both dyes (Reactive Black 5 and Orange II dye, 99% and 99.5% degradation in 105 and 150 min, respectively). The incorporation of TiO2 NPs into MOFs can decrease the recombination of the change carrier in the MOF, increasing the photocatalytic activity of a pristine MOF. Results therefore indicated that the synthesized MOF nanocomposites have good potential for wastewater treatment.

Keywords: MIL-100 (Fe); MOFs; Orange II; Reactive Black 5; TiO2/MIL-100 composite material; dye photocatalytic degradation.

MeSH terms

  • Coloring Agents / chemistry
  • Iron / chemistry
  • Metal-Organic Frameworks* / chemistry
  • Nanoparticles*

Substances

  • 2-naphthol orange
  • titanium dioxide
  • Coloring Agents
  • Remazol black B
  • Iron
  • Metal-Organic Frameworks

Grants and funding

This research was funded by MINECO (Spanish Government) project PID2020-114192RB-C41, and also was support from Comunidad de Madrid for a “Doctorados Industriales” project (IND2020/IND-17375), co-financed by the European Social Fund.