Preparation of Potassium-doped Carbon Nitride Photocatalyst and Study on Its Performance in Degrading Tetracycline
The design and preparation of efficient catalysts is a research hotspot for photocatalytic degradation of tetracycline(TC).Using thiourea and potassium bromide as raw materials,a potassium-doped graphite phase carbon nitride(K-C3N4)photocatalyst was prepared through a simple one-step calcination method,and it was activated by potassium hydrogen persulfate to degrade tetracycline.The effects of catalyst dosage,potassium hydrogen persulfate dosage,initial pH value of the solution,and initial concentration of the solution on the degradation performance were investigated.The results show that the optimal dosage of potassium-doped carbon nitride(CN-K5)is 10 mg,the concentration of potassium hydrogen persulfate is 2 mmol/L,the initial pH value of the tetracycline solution is 4,and the initial concentration is 10 mg/L,the removal rate of tetracycline was 86%.Cycle experiments show that CN-K5 has good photochemical stability.It has broad industrial application prospects.
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