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A novel Z-scheme heterojunction g-C3N4/WS2@rGONR(x) nanocomposite for efficient photoelectrochemical water splitting.
- Source :
-
Materials Chemistry & Physics . Jan2023, Vol. 293, pN.PAG-N.PAG. 1p. - Publication Year :
- 2023
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Abstract
- In the present work, 2D monolayers of WS 2 and g-C 3 N 4 were synthesized for the preparation of WS 2 /g-C 3 N 4 nanostructure through a two-step process. 1D graphene oxide nanoribbons (GONRs) were synthesized via unzipping of multi-walled carbon nanotubes (MWCNTs) and applied for the preparation of three-component g-C 3 N 4 /WS 2 @rGONR (x) (x = 1, 2, and 5 wt%) nanocomposites. The synthesized nanocomposites were evaluated via Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), energy-dispersive X-ray spectroscopy (EDX), high-resolution transmission electron microscopy (HRTEM), and diffuse reflectance spectroscopy (DRS). The photocatalytic performance of the nanostructures was investigated in the hydrogen evolution reaction (HER) using the Fluorine-doped tin oxide (FTO) as the electrode. Subsequently, a possible photocatalytic mechanism was estimated. According to the results, the g-C 3 N 4 /WS 2 @rGONR (x) modified FTO has the lowest Tafel slope (60 mV dec−1), and overpotential (150 mV), the highest current density (47 mA cm−2) and also the maximum stability (19 mA for 3000s). Therefore, g-C 3 N 4 /WS 2 @rGONR (2) photocatalyst can be a novel and efficient candidate for hydrogen production as a clean fuel. • g-C 3 N 4 /WS 2 naosheets were prepared and placed on the graphene oxide nanoribbons. • Heterojunction g-C 3 N 4 /WS 2 @rGONR (x) nanocomposites were used in water splitting process. • rGONR act as an effective bridge for improving the photocatalytic properties of g-C 3 N 4 /WS 2. • g-C 3 N 4 /WS 2 @rGONR (2) photocatalyst showed promising performance for H 2 production. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 02540584
- Volume :
- 293
- Database :
- Academic Search Index
- Journal :
- Materials Chemistry & Physics
- Publication Type :
- Academic Journal
- Accession number :
- 160557701
- Full Text :
- https://doi.org/10.1016/j.matchemphys.2022.126941