Synthesis of Biomass Porous Carbon Loaded on 2,4,6-Triaminopyrimidine Modified G-C3n4 by One Step Thermal Condensation for Enhancing Oxytetracycline Removal

Since the traditional g-C3N4 photocatalyst was sever ely affected by low charge transfer rates and light absorption capacity, which inevitably limits its application in environmental pollution treatment. Herein, mixing the 2,4,6-triaminopyrimidine (TAP) doped melamine and biomass porous carbon (BPC), the TAP-BPC/CN composite with desirable conductivity and structure properties was synthesized by one step thermal condensation. The effects of the TAP doping amount and material characteristics on the adsorption and photocatalytic performance of the composite were investigated. The results show that the carbon atom of TAP partially replaced the nitrogen atom of tri-s-triazine structure of g-C3N4 , and decreased the interlayer distance of graphite lamellar structure, then improved the electrical conductivity of the materials and suppressed the recombination of photogenerated carriers. Meanwhile, the sample of 1TAP-BPC/CN exhibited the optimal removal efficiency for OTC, and the adsorption capacity and photocatalytic reaction rate was 4.39 times and 5.71 times than g-C3N4 , respectively. In addition, the mechanism of OTC photocatalytic on TAP-BPC/CN composite was further explored by active group capture experiments and photoelectrochemical characterization analyses, and the composite prepared by the BPC loaded on the TAP doping g-C3N4 was verified to enhance the OTC photocatalytic performance.