Fig. 1. The SEM images of g-C₃N₄ nanosheets and g-C₃N₄/CdS heterostructures

Fig. 2. The EDS patterns of g-C₃N₄ nanosheets and g-C₃N₄/CdS heterostructures

Fig. 3. The XRD patterns of g-C₃N₄ nanosheets and g-C₃N₄/CdS heterostructures

Fig. 4. The XPS spectra of g-C₃N₄/CdS heterostructures

Fig. 5. Time dependent current response curves of g-C₃N₄ nanosheets and g-C₃N₄/CdS heterojunction detector under on/off UV illumination

Fig. 6. Time dependent current response curves of g-C₃N₄ nanosheets and g-C₃N₄/CdS heterojunction detector under on/off blue light illumination

Fig. 7. Time dependent current response curves of g-C₃N₄ nanosheets and g-C₃N₄/CdS heterojunction detector under on/off green light illumination

Fig. 8. The PL spectra of g-C₃N₄ nanosheets and g-C₃N₄/CdS heterostructures

Fig. 9. The schematic illustration of g-C₃N₄/CdS detector under UV and visible light