Synergistic Integration of g-C3N4 with SnS: Unlocking Enhanced Photocatalytic Efficiency and Electrochemical Stability for Dual-Functional Applications

The synthesis of graphitic carbon nitride (g-C3N4) coupled with tin sulfide (SnS) has been identified as an effective method for improving the photocatalytic and electrochemical performance of SnS, a promising material for environmental and energy-related applications. In this study, we focused on how g-C3N4 influences the structural, optical, electrochemical, and functional properties of SnS. XRD and FTIR confirmed the formation of SnS/g-C3N4 heterostructure, while surface morphology analysis by SEM showed proper dispersion of SnS particles over g-C3N4 with a good interface contact. The SnS/g-C3N4 composite itself demonstrated improved photocatalytic performance, with the degradation rate of methylene blue reaching approximately 94% under visible light irradiation compared to the moderate activity of SnS. This enhancement can be credited to the successful charge carrier separation enabled by the type II heterojunction created between SnS and g-C3N4. Moreover, the composite presented improved electrochemical activity with a specific capacitance of 1340 F·g−1 at a scan rate of 10 A·g−1 and good cycling stability, where the capacitance was 92% after 5000 cycles. As such, these SnS/g-C3N4 composites suggest the specific application of this class of material in photocatalytic degradation as well as energy storage, putting forward new effective resolutions to environmental and energy issues.