Synthesis and characterization of Fe-TiO2@SiO2@Fe3O4 magnetic visible light photocatalyst for removal of Rhodamine B dye

Nguyen Thi Thuy Tien; Tran Dang Do; Nguyen Minh Viet; Ha Minh Ngoc; Dang Nhat Minh; Vu Duc Cuong; Nguyen Minh Phuong

doi:10.51316/jca.2021.032

Authors

Nguyen Thi Thuy Tien Faculty of Chemistry, University of Science, Vietnam National University, Hanoi, 19 Le Thanh Tong, Hoan Kiem, Hanoi, Vietnam
Tran Dang Do Faculty of Chemistry, University of Science, Vietnam National University, Hanoi, 19 Le Thanh Tong, Hoan Kiem, Hanoi, Vietnam
Nguyen Minh Viet Hanoi University of Science, Viet Nam National University
Ha Minh Ngoc Hanoi University of Science, Viet Nam National University
Dang Nhat Minh Hanoi University of Science, Viet Nam National University
Vu Duc Cuong Viet Tri University of Industry
Nguyen Minh Phuong Faculty of Chemistry, University of Science, Vietnam National University, Hanoi, 19 Le Thanh Tong, Hoan Kiem, Hanoi, Vietnam

DOI:

https://doi.org/10.51316/jca.2021.032

Keywords:

TiO2, magnetic, photocatalyst, visible light, Rhodamine B

Abstract

In this research, the magnetic visible light photocatalyst of Fe-TiO₂@SiO₂@Fe₃O₄ was synthesised using co-precipitation, sol-gel and hydrothermal method. The as-obtained material’s properties were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), diffuse reflectance spectra (UV- Vis), magnetic curve (VSM) and photoluminescence (PL). The catalytic activity of the materials under visible light was investigated for degradation of Rhodamine B pigment in water. The obtained results indicated that at the catalyst dose of 0.5 g/L, Fe-TiO₂@SiO₂@Fe₃O₄ with TiO₂/SiO₂@Fe₃O₄ (SF) ratio of 2:1 performed the highest efficiency of 99.3 % after 180 minutes under irritation. The enhanced photocatalytic performance of Rhodamine B under visible light could be ascribed to the reducing of band gap energy and decrease in the recombination rate of photogenerated electron/hole pairs. The catalytic activity after four times of recycling were 71,3 %.The material showed potential for further application in water treatment.

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