Isomorphous substitution of Cr by Fe in MIL-101 framework and its application as a novel heterogeneous photo-Fenton catalyst for reactive dye degradation

Tuan. A. Vu; Giang. H. Le; Canh. D. Dao; Lan. Q. Dang; Kien. T. Nguyen; Phuong. T. Dang; Hoa. T. K. Tran; Quang. T. Duong; Tuyen. V. Nguyen; Gun. D. Lee

doi:10.1039/C4RA06522K

Isomorphous substitution of Cr by Fe in MIL-101 framework and its application as a novel heterogeneous photo-Fenton catalyst for reactive dye degradation

Tuan. A. Vu,*^a Giang. H. Le,^a Canh. D. Dao,^a Lan. Q. Dang,^b Kien. T. Nguyen,^a Phuong. T. Dang,^a Hoa. T. K. Tran,^a Quang. T. Duong,^c Tuyen. V. Nguyen^a and Gun. D. Lee^d

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* Corresponding authors

^a Institute of Chemistry, Vietnam Academy of Science and Technology (VAST), 18 Hoang Quoc Viet, Cau Giay District, Hanoi, Vietnam
E-mail: vuanhtuan.vast@gmail.com

^b College of education-Hue university, Vietnam

^c Hue University of Education, Vietnam

^d College of Engineering, Pukyong National University, 113, Engineering Building 4, Yongdang Campus, Busan, South Korea

Abstract

Partial isomorphous substitution of Cr by Fe in the MIL-101 framework was achieved by direct synthesis using a hydrothermal method (conventionally, solvothermal method). The products were characterized by XRD, EDX, N₂ adsorption (BET), TEM, UV-vis, FTIR, XPS and testing the photo-Fenton activities in the degradation of the commercial reactive dye RR195. From FTIR and XPS results, it was revealed that Fe is really incorporated into the MIL-101 framework. From EDX results, an amount of ca. 25% of Cr atoms in the MIL-101 framework is substituted by Fe atoms. Fe substituted Cr-MIL-101 showed high adsorption capacity of reactive dye. Moreover, this material exhibited high photo-Fenton activity in reactive dye degradation, opening new applications of MOFs as novel heterogenous photo-Fenton catalysts.

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Isomorphous substitution of Cr by Fe in MIL-101 framework and its application as a novel heterogeneous photo-Fenton catalyst for reactive dye degradation

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Isomorphous substitution of Cr by Fe in MIL-101 framework and its application as a novel heterogeneous photo-Fenton catalyst for reactive dye degradation

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