Heterogeneous UV/Fenton-Like Degradation of Methyl Orange Using Iron Terephthalate MIL-53 Catalyst

Author:

Dinh Du Pham1ORCID,Thanh Danh Huynh2,Ngoc Hoai Pham1,Thanh Nguyen Mau3,Thang Nguyen Vo4,Quang Khieu Dinh5ORCID

Affiliation:

1. Thu Dau Mot University, Thu Dau Mot 75000, Vietnam

2. Giong Rieng High School, Giong Rieng 91000, Vietnam

3. Quang Binh University, Dong Hoi 47000, Vietnam

4. The University of Da Nang, University of Science and Education, Da Nang 50000, Vietnam

5. University of Sciences, Hue University, Hue 49000, Vietnam

Abstract

The synthesis and degradation of methyl orange (MO) in an ultraviolet-assisted heterogeneous Fenton-like process via the iron terephthalate (MIL-53) catalyst are demonstrated. MIL-53 material was characterized by means of X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FT-IR), UV-Vis diffuse reflectance spectra (DR-UV-Vis), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), and nitrogen adsorption/desorption isotherms. It was found that the obtained material shares an identical pattern of the MIL-53 structure with high crystallinity and also demonstrates the mesoporous phase with a pore diameter of around 4.2 nm and specific surface area, SBET, of 88.2 m2·g−1. MIL-53 with UV irradiation exhibits high catalytic activity for MO degradation by hydrogen peroxide. The factors affecting the efficiency of MO decomposition including pH of the solution, H2O2 concentration, catalyst dosage, initial MO concentration, and reaction temperature were addressed. The present catalyst is stable after four recycles with slight catalytic activity loss which makes it a potential candidate for environmental restoration.

Publisher

Hindawi Limited

Subject

General Chemistry

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