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Hydrogen catalytic performance of hybrid Fe3O4/FeS2/g-C3N4 nanocomposite structures

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Article number110214
<mark>Journal publication date</mark>31/10/2023
<mark>Journal</mark>Diamond and Related Materials
Publication StatusPublished
Early online date4/08/23
<mark>Original language</mark>English


In this work, Fe 3O 4/FeS 2/g-C 3N 4 nanocomposites were developed for catalytic hydrogen generation from sodium borohydride. X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and environmental scanning electron microscopy (ESEM) were used to analyze these nanocomposites. The XRD diffraction peaks of Fe 3O 4 and FeS 2 cubic phase showed an average crystal size of calculation of 15 and 20 nm. ESEM micrographs showed a 2D broken up sheet structure having more edge sites. The BET surface areas for S@g-C 3N 4, 1.0, 2.0, and 3.0 wt% Fe 3O 4/FeS 2 were 40, 109, 137 and 162 m 2/g, respectively. Even though Fe 3O 4/FeS 2 were incorporated into the nanosheet, the pore size was increased from 2.0 to 2.15 nm. S@g-C 3N 4 has an average band gap of 2.60 eV that decreased to 2.30, 2.21 and 2.18 eV at 1.0, 2.0 and 3.0 wt% of FeS 2. In addition, Fe 3O 4/FeS 2/g-C 3N 4 nanosheets showed an emission band at 460 nm. Moreover, the intensity of this band decreased as the content of Fe 3O 4/FeS 2 reached 3.0 wt%. The rate of hydrogen production is accelerated as the percentage of Fe 3O 4/FeS 2 increased from 1.0 to 3.0 wt%. The sample 3.0 wt% Fe 3O 4/FeS 2 showed the best rate of hydrogen production (8480 mL/g·min).