Preparation, characterization and photocatalytic activity for degradation of methylene blue by ZnFe2O4/Bentonite nanocomposite

Nguyen Thi To Loan; Ha Thi Phuong Thanh; Nguyen Thi Thuy Hang; Nguyen Quang Hai; Vu Van Nhuong; Bui Duc Nguyen

doi:10.62239/jca.2023.078

Authors

Nguyen Thi To Loan Thai Nguyen University of Education
Ha Thi Phuong Thanh Thai Nguyen University of Education
Nguyen Thi Thuy Hang Thai Nguyen University of Technology
Nguyen Quang Hai Thai Nguyen University of Education
Vu Van Nhuong Thai Nguyen University of Education
Bui Duc Nguyen Thai Nguyen University of Education

DOI:

https://doi.org/10.62239/jca.2023.078

Keywords:

nanocomposite, ZnFe2O4/bentonite, methylene blue, Photo-Fenton oxidation, photocatalysis

Abstract

In this work, we report synthesis of bentonite (BT) supported softmagnetic ZnFe₂O₄ nanoparticles to obtain ZnFe₂O₄/BT. The composition, surface morphology and optical properties of the sample were characterized by XRD, EDX, FTIR, SEM and DRS analysis. The results of SEM show that the ZnFe₂O₄ nanoparticles spread on the thin layer of bentonite due to intercalation with bentonite. The band gaps of Bentonite, ZnFe₂O₄and ZnFe₂O₄/BT are 2.18; 1.95 and 1.82 eV respectively. The photocatalytic activity of the samples is evaluated by the degradation of methylene blue (MB) in the presence of H₂O₂ under visible light radiation. The results indicated that the ZnFe₂O₄/BT samples exhibited higher removal efficiencies than the pure ZnFe₂O₄ ferrites. The enhanced photocatalytic activity of the ZnFe₂O₄/BT is explained due to visible light adsorption ability, and larger interfacial area, as well as the efficient separation mechanism of photoinduced electron and holes.

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