Abstract: g-C₃N₄ nanorods with less defects were prepared by rapid heating reflux.The precursor of TiO₂ doped with nickel was loaded on the surface of g-C₃N₄ nanorods,and the g-C₃N₄ nanorod/TiO₂/NiO nanocomposites as photo-catalysts were prepared by heat treatment.Finally,carbon nanotubes (CNTs) were grown on the surface of the g-C₃N₄ nanorod/TiO₂/NiO by in-situ chemical vapor deposition (CVD),using the metal nickel reduced in TiO₂ as catalyst.The prepared g-C₃N₄ nanorod/Ni/TiO₂/CNTs nanocomposite photocatalysts were characterized by X-ray diffraction(XRD),thermogravimetry(TG),transmission electron microscopy(TEM),FT-IR and UV-Vis absorption spectroscope.The photocatalytic activities were investigated by the degradation of methylene blue(MB) under UV and visible light,respectively.The degradation rate of MB catalyzed by g-C₃N₄ nanorod/TiO₂/Ni/CNTs nanocomposites were 87% and 68% under UV and visible lights,respectively.The catalytic activity of g-C₃N₄ nanorod/TiO₂/Ni/CNTs was significantly improved compared to g-C₃N₄/TiO₂/NiO.