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Fabrication of heterostructured CdS/g-C3N4/ZnFe2O4 nanocomposite synthesized through ultrasonic-assisted method for efficient photocatalytic hydrogen production

2022; Elsevier BV; Volume: 602; Linguagem: Inglês

10.1016/j.apsusc.2022.154315

1873-5584

Rania Belakehal, Keziban Atacan, Nuray Güy, Adel Megriche, Mahmut Özacar,

ZnO doping and properties

• CdS/g-C 3 N 4 /ZnFe 2 O 4 was successfully prepared by growing ZnFe 2 O 4 and CdS nanoparticles on g-C 3 N 4 via the ultrasonication method. • CdS/g-C 3 N 4 /ZnFe 2 O 4 exhibited the highest H 2 production rate of 405 μmol g −1 . • The ternary heterojunction between the components enhances carrier separation. • CdS/g-C 3 N 4 /ZnFe 2 O 4 photocatalysts can be easily separated by an external magnetic field after water splitting. To photocatalytic hydrogen production from water, efficient nanocomposite designs strengthen the active sites of efficient heterostructured photocatalysts and provide directional transfer of photocarriers. In this study, we fabricated CdS/g-C 3 N 4 /ZnFe 2 O 4 for hydrogen production from water by the visible light illumination. Firstly, the CdS/g-C 3 N 4 /ZnFe 2 O 4 nanocomposite was synthesized via the ultrasonication procedure. Secondly, the crystal structure, morphology, chemical valence, and functional groups of all samples were examined by XRD, SEM, HRTEM, XPS, FTIR, UV–Vis, PL spectroscopy, etc. The electrochemical behaviors of all samples were measured via EIS, LSV, photocurrent, Tafel, etc. techniques. Finally, the hydrogen evolution rate of all samples was analyzed by gas chromatography and it was determined that the CdS/g-C 3 N 4 /ZnFe 2 O 4 nanocomposite had the highest hydrogen production rate with 405 µmol g −1 under visible light. The hydrogen production rate of CdS/g-C 3 N 4 /ZnFe 2 O 4 is 45.73, 30.04, 6.46, 3.95, and 1.72 times higher than that of ZnFe 2 O 4 , g-C 3 N 4 , CdS, g-C 3 N 4 /ZnFe 2 O 4 , and CdS/g-C 3 N 4 respectively. With the type II heterostructure of the CdS/g-C 3 N 4 /ZnFe 2 O 4 ternary nanocomposite, efficient directional transfer of photocarriers is achieved and recombination of photocarriers is averted. This study offers new alternatives on the preparation of magnetic ternary photocatalysts with increased photocatalytic efficiency and stability for hydrogen production applications.