Abstract
AbstractThe 3D network structure composed of g‐C3N4 nanorods was prepared via treatment of bulk g‐C3N4 with hot HNO3 followed by adjustment the pH and lyophilization. Then the 3D g‐C3N4/TiO2−x heterojunctions with a strong interface was constructed via loading TiO2−x nanoparticles onto the 3D g‐C3N4 networks under hydrothermal conditions. The structure and morphology of the 3D g‐C3N4/TiO2−x heterojunctions was characterized by infrared spectrum (FTIR), X‐ray diffraction (XRD), X‐ray photoelectron spectroscopy (XPS), scanning electron microscope (SEM) and field emission transmission electron microscope (TEM). The photo‐degradation rate of Doxycycline HCl for 3D g‐C3N4/TiO2−x heterojunction is about 4 times of that original bulk‐C3N4 and 2.75 times of 3D g‐C3N4. The improved photocatalytic efficiency is attributed to 3D g‐C3N4 networks, which provides the more transfer channel to accelerate the electron transportation and the strong heterointerface between g‐C3N4 and TiO2−x which promotes the separation of the electron‐holes. Besides, more adsorption capacity of the pollutant onto the 3D g‐C3N4/TiO2−x also contributed to this high efficiency.
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