The sublethal content of antibiotics in the environment brings added urgency to degrade antibiotics to prevent the growth of antibiotic resistance and the accompanying public health crisis. Herein, we adopted a rational and intriguing strategy for constructing a porous, supported photocatalyst. A solution containing graphitic carbon nitride (g-C3N4), polyethylene glycol (PEG), and polyethylene terephthalate (PET) was electrospun, and followed by a postptocessing to remove the PEG, porous nanofibers (g-C3N4@PET) were obtained. Meanwhile, the gC(3)N(4)@PET morphology and composition were determined by a series of analysis techniques. The g-C3N4/PET exhibits several favorable characteristics, namely, (i) it is easy to create more active sites due to the formation of pores throughout the nanofibers and the successful embedding of g-C3N4, (ii) the interconnected channel is beneficial for catalyst antibiotics contact and light absorption, and (iii) it possesses high photocatalytic performance and reusability, avoiding the reunion and sedimentation of pure g-C3N4. This approach has an enormous potential for loading powder catalysts in real applications.