Solvothermal Synthesis of g-C3N4/TiO2 Hybrid Photocatalyst with a Broaden Activation Spectrum

A solvothermal self-made composite of graphitic carbon nitride (g-C3N4) and commercially available titanium dioxide (TiO2) demonstrated the removal commercial acid green-25 (AG-25) textile dye in a saline water matrix when activated by ultraviolet (UV) visible light. The g-C3N4-TiO2 was characterized X-ray diffraction (XRD), Nitrogen sorption–desorption recording modeling Brunauer–Emmett–Teller (BET) theory, scanning electron microscopy (SEM), energy-dispersive spectroscopy (EDX), diffuse reflectance (DRS), photoelectron (XPS), photoluminescence (PL), spin resonance (ESR). process did not modify crystalline structure g-C3N4 TiO2 but enhanced surface area interlayer delamination g-C3N4. Under simulated solar spectrum (including UVA/B vis wavelengths), degradation rate AG-25 two four times higher than that pure g-C3N4, respectively (0.04, 0.02, 0.01 min−1). Unlike TiO2, with light (the UV portion filtered out). This work provides insight into contribution various reactive oxidative species (ROS) to composite.