Chlorophenols are corrosive and toxic in water environment, which have arisen increasing concerns and urge solar-driven technique with highly efficient photocatalysts for green remediation. Coupling photocatalysis with surface plasmon resonance (SPR) effect is a practical solution to boosting the utilization of solar light in the infrared region, meanwhile improving the overall performance of the photocatalysts. However, it is still lack of a facile and green strategy to synthesize metallic non-noble bismuth (Bi 0)-based photocatalysts. Herein, we report smart Bi/Bi2O3/C composites with high performance for photocatalytic degradation of 2,4-dichlorophenol. Advanced characterizations such as X-ray Diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS) and high-resolution transmission electron microscopy (HRTEM) are applied to analyze the morphology and structure of the prepared materials. The photodegradation rate of the hybrid is significantly enhanced compared with the sole counterparts, which is 1.60-fold of Bi2O3 and 2.47-fold of g-C3N4. The synthesized Bi/C-2 exhibits excellent stability without decline in activity after four cycles. The SPR effect of Bi is identified to account for the strengthen photo-reactivity. Moreover, the relatively high utilization efficiency of solar energy and rapid separating rate of photogenerated electron and hole pairs helped to enhance the photocatalytic performance synergistically.