High photocatalytic activity of magnetic composite photocatalyst NiFe2O4/BiVO4 for rhodamine b degradation under visible led light irradiation

Minh Que Doan; Linh Xuan Nong; Trinh Duy Nguyen

doi:10.15625/2525-2518/58/6/15157

Author affiliations

Authors

Minh Que Doan Center of Excellence for Green Energy and Environmental Nanomaterials (CE@GrEEN), Nguyen Tat Thanh University, 300A Nguyen Tat Thanh, District 4, Ho Chi Minh City, Viet Nam
Linh Xuan Nong Center of Excellence for Green Energy and Environmental Nanomaterials (CE@GrEEN), Nguyen Tat Thanh University, 300A Nguyen Tat Thanh, District 4, Ho Chi Minh City, Viet Nam
Trinh Duy Nguyen Center of Excellence for Green Energy and Environmental Nanomaterials (CE@GrEEN), Nguyen Tat Thanh University, 300A Nguyen Tat Thanh, District 4, Ho Chi Minh City, Viet Nam https://orcid.org/0000-0002-7241-1488

DOI:

https://doi.org/10.15625/2525-2518/58/6/15157

Keywords:

Magnetic composite photocatalyst, NiFe2O4/BiVO4, rhodamine B degradation, visible LED light irradiation

Abstract

To improve the photocatalytic activity of BiVO₄ semiconductor, the design of composite photocatalyst containing BiVO₄ with surpassing the recombination of photoinduced electron and hole is highly required. In this study, magnetic composite photocatalyst with NiFe₂O₄ and BiVO₄has developed through two-steps hydrothermal method. The results show that the morphology of the bare BiVO₄ had a decahedral shape with smooth surfaces along with particles, while the morphology of the bare NiFeO₄ had nanoparticles with the diameter in a range of 10-20 nm. In the case of 20% NiFe₂O₄/ BiVO₄ samples, a large of nanoparticles were deposited into large bulk, implying the incorporation of NiFe₂O₄nanoparticles on the surface of BiVO₄ catalyst. Compared with the bare BiVO₄, the NiFe₂O₄/BiVO₄ composites had a higher photocatalytic efficiency for photodecomposition of rhodamine B (RhB) under visible LED light irradiation. The improvement of photocatalytic degradation RhB activity should be attributed to a direct Z‐scheme system. Therefore, the fabrication of semiconductors with a combination of magnetic materials provides new insight for the enhancement of their photocatalytic performance.

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References

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