Enhanced Photocatalytic Degradation of MB Under Visible Light Using the Modified MIL-53(Fe)

In this report, we focus on the modification of iron terephthalate metal–organic framework (MIL-53(Fe)) by soaking in H 2 O 2 solution and its mechanism. The structure of MIL-53(Fe) before and after the modification were characterized by Fourier-transform infrared spectroscopy (FTIR), X-ray powder d...

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Bibliographic Details
Published in:Topics in catalysis 2020-10, Vol.63 (11-14), p.1227-1239
Main Authors: Quang, Tran Thuong, Truong, Nguyen Xuan, Minh, Tran Hong, Tue, Nguyen Ngoc, Ly, Giang Thi Phuong
Format: Article
Language:English
Subjects:
Absorption spectra
Amorphous materials
Catalysis
Catalysts
Characterization and Evaluation of Materials
Chemistry
Chemistry and Materials Science
Energy gap
Fourier transforms
Hydrogen peroxide
Industrial Chemistry/Chemical Engineering
Iron
Metal-organic frameworks
Methylene blue
Nanoparticles
Original Paper
Parameter modification
Pharmacy
Photocatalysis
Photodegradation
Photoluminescence
Physical Chemistry
Spectrum analysis
Terephthalate
X ray powder diffraction
X-ray diffraction
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Summary:In this report, we focus on the modification of iron terephthalate metal–organic framework (MIL-53(Fe)) by soaking in H 2 O 2 solution and its mechanism. The structure of MIL-53(Fe) before and after the modification were characterized by Fourier-transform infrared spectroscopy (FTIR), X-ray powder diffraction (XRD), and N 2 adsorption–desorption isotherms. The XRD results showed that the material structure changed to amorphous phases and the photocatalytic efficiency was improved after modified by H 2 O 2 . The MIL-53 (Fe, H 2 O 2 ) nanoparticles about 100–300 nm in size was successfully prepared and confirmed by SEM images. In term of UV–Vis DRS results, the absorption spectrum of modified MIL-53(Fe) shifted to higher wavelength and its band gap energy is estimated about 2.2 eV, which is significantly lower than the bandgap value of the conventional material. The impact of the modification on the photocatalytic efficiency was investigated by methylene blue (MB) degradation experiments and photoluminescence (PL) spectroscopy. MB was completely decomposed within 30 min by modified MIL-53(Fe) under optimal conditions. The reaction parameters that affect MB degradation by the as-prepared catalyst were also investigated, including the pH solution, catalyst and H 2 O 2 dosage.
ISSN:1022-5528
1572-9028
DOI:10.1007/s11244-020-01364-2