Synthesis of Mn-Doped Fe-MOFs with Different Ratios and Its Application for Photocatalytic Degradation of Rhodamine B Dye

Kim Ngan Thi Tran; Thuy Bich Tran; Sy Trung Do; Kim Oanh Thi Nguyen; Tan Van Lam

doi:10.22146/ijc.67742

Synthesis of Mn-Doped Fe-MOFs with Different Ratios and Its Application for Photocatalytic Degradation of Rhodamine B Dye

https://doi.org/10.22146/ijc.67742

Kim Ngan Thi Tran^(1*), Thuy Bich Tran⁽²⁾, Sy Trung Do⁽³⁾, Kim Oanh Thi Nguyen⁽⁴⁾, Tan Van Lam⁽⁵⁾

(1) Institute of Environmental Sciences, Nguyen Tat Thanh University, Ho Chi Minh City, Vietnam Faculty of Environmental and Food Engineering, Nguyen Tat Thanh University, Ho Chi Minh City, Vietnam
(2) Institute of Environmental Science, Engineering and Management, Industrial University of Ho Chi Minh City, Vietnam
(3) Institute of Chemistry, Vietnam Academy of Science and Technology (VAST), Hanoi City, Vietnam
(4) Institute of Environmental Sciences, Nguyen Tat Thanh University, Ho Chi Minh City, Vietnam Faculty of Environmental and Food Engineering, Nguyen Tat Thanh University, Ho Chi Minh City, Vietnam
(5) Institute of Environmental Sciences, Nguyen Tat Thanh University, Ho Chi Minh City, Vietnam Faculty of Environmental and Food Engineering, Nguyen Tat Thanh University, Ho Chi Minh City, Vietnam
(*) Corresponding Author

Abstract

Recent trends in environmental remediation have shifted to the use of metal-organic framework (MOF) composites due to their unique structural properties. It is still challenging to diversify MOFs photocatalysts to fulfill application to treat toxic organic pigments. In this study, Fe-MOF bimetallic materials were synthesized by doping Mn²⁺ ions at different ratios. The structural and morphological characteristics of the materials were analyzed by XRD, UV-Vis, FT-IR, SEM, and UV-Vis DRS methods. Mn/Fe-MOF bimetallic organic framework materials were used to evaluate the photocatalytic degradation of Rhodamine B (RhB) dyes. The results show that, under the same experimental conditions, the RhB degradation efficiency of Mn/Fe-MOF is enhanced than that of the pristine Fe-MOF catalyst under the influence of visible light. After 120 min, the RhB solution was decomposed to 91.78% by combining 0.1 Mn/Fe-MOF, H₂O₂, and visible light irradiation. At the same time, the presence of H₂O₂ in the reaction system also showed a strong impact on the efficiency of RhB degradation. The activity from the two metal centers of Mn/Fe-MOF contributes to the formation of a unique structure and composition that can be used as a photocatalyst for colored wastewater treatment.

Keywords

synthesis; bimetallic-organic framework; photocatalytic dye degradation

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DOI: https://doi.org/10.22146/ijc.67742