TY - JOUR AU - Doan, Minh Que AU - Nong, Linh Xuan AU - Nguyen, Trinh Duy PY - 2020/12/15 Y2 - 2024/03/29 TI - High photocatalytic activity of magnetic composite photocatalyst NiFe2O4/BiVO4 for rhodamine b degradation under visible led light irradiation JF - Vietnam Journal of Science and Technology JA - Vietnam J. Sci. Technol. VL - 58 IS - 6 SE - Materials DO - 10.15625/2525-2518/58/6/15157 UR - https://vjs.ac.vn/index.php/jst/article/view/15157 SP - 718-727 AB - <p>To improve the photocatalytic activity of BiVO<sub>4</sub> semiconductor, the design of composite photocatalyst containing BiVO<sub>4</sub> with surpassing the recombination of photoinduced electron and hole is highly required. In this study, magnetic composite photocatalyst with NiFe<sub>2</sub>O<sub>4</sub> and BiVO<sub>4 </sub>has developed through two-steps hydrothermal method. The results show that the morphology of the bare BiVO<sub>4</sub> had a decahedral shape with smooth surfaces along with particles, while the morphology of the bare NiFeO<sub>4</sub> had nanoparticles with the diameter in a range of 10-20 nm. In the case of 20% NiFe<sub>2</sub>O<sub>4</sub>/ BiVO<sub>4</sub> samples, a large of nanoparticles were deposited into large bulk, implying the incorporation of NiFe<sub>2</sub>O<sub>4 </sub>nanoparticles on the surface of BiVO<sub>4</sub> catalyst. Compared with the bare BiVO<sub>4</sub>, the NiFe<sub>2</sub>O<sub>4</sub>/BiVO<sub>4</sub> 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 Zā€scheme system. Therefore, the fabrication of semiconductors with a combination of magnetic materials provides new insight for the enhancement of their photocatalytic performance.</p> ER -