Effective photocatalytic activity of mixed Ni/Fe-base metal-organic framework under a compact fluorescent daylight lamp

Vinh H Nguyen, Trinh Duy Nguyen, Long Giang Bach, Thai Hoang, Quynh Thi Phuong Bui, Lam Dai Tran, Chuong V. Nguyen, Dai Viet N. Vo, Sy Trung Do

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Abstract

Mixed Ni/Fe-base metal-organic framework (Ni/Fe-MOF) with different molar ratios of Ni2+ /Fe3+ have been successfully produced using an appropriate solvothermal router. Physicochemical properties of all samples were characterized using X-ray diffraction (XRD), Raman, field emission scanning electron microscopes (FE-SEM), fourier-transform infrared spectroscopy (FT-IR), N2 adsorption-desorption analysis, X-ray photoelectron spectroscopy (XPS), ultraviolet-visible diffuse reflectance spectra (UV-Vis DRS), and photoluminescence spectra (PL). The photocatalytic degradation performances of the photocatalysts were evaluated in the decomposition of rhodamine B (RhB) under a compact fluorescent daylight lamp. From XRD, IR, XPS, and Raman results, with the presence of mixed ion Fe3+ and Ni2+, MIL-88B (MIL standing for Materials of Institut Lavoisier) crystals based on the mixed metal Fe2 NiO cluster were formed, while MIL-53(Fe) was formed with the presence of single ion Fe3+ . From UV-Vis DRS results, Ni/Fe-MOF samples exhibited the absorption spectrum up to the visible region, and then they showed the high photocatalytic activity under visible light irradiation. A Ni/Fe-MOF sample with a Ni2+ /Fe3+ molar ratio of 0.3 showed the highest photocatalytic degradation capacity of RhB, superior to that of the MIL-53(Fe) sample. The obtained result could be explained as a consequence of the large surface area with large pore volumes and pore size by the Ni2+ incorporating into the MOF’s structure. In addition, a mixed metal Fe/Ni-based framework consisted of mixed-metal cluster Fe2 NiO with an electron transfer effect and may enhance the photocatalytic performance.

Original languageEnglish (US)
Article number487
JournalCatalysts
Volume8
Issue number11
DOIs
StatePublished - Nov 2018

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Keywords

  • MIL-53(Fe)
  • Ni/Fe-MOF
  • Photocatalytic decomposition of rhodamine B
  • Visible light irradiation

Cite this

Nguyen, V. H., Nguyen, T. D., Bach, L. G., Hoang, T., Bui, Q. T. P., Tran, L. D., Nguyen, C. V., Vo, D. V. N., & Do, S. T. (2018). Effective photocatalytic activity of mixed Ni/Fe-base metal-organic framework under a compact fluorescent daylight lamp. Catalysts, 8(11), [487]. https://doi.org/10.3390/catal8110487