在可见光下钴掺杂C_(3)N_(5)活化过氧硫酸盐降解四环素的研究

Study on the Degradation of Tetracycline by Cobalt-doped C_(3)N_(5)Activated Persulfate under Visible Light

以氯化钴和3-氨基1,2,4-三唑为原料,采用固相热解法制备了一种掺钴的氮化碳基复合材料,并与过硫酸氢钾活化剂用于可见光催化降解水体中的四环素。对制备的掺钴氮化碳基催化材料进行了XRD,SEM,FT-IR等表征分析,从晶体结构、微观形貌,化学成分等方面分析了催化材料比单一催化剂降解四环素效果更好的原因。此外,考察了催化剂投加量、过硫酸氢钾投加量、四环素的初始浓度、不同质量配比的催化剂等因素对四环素降解效果的影响。实验结果表明:掺钴氮化碳基的复合材料活化PMS降解TC在钴掺杂为1.2%的C_(3)N_(5),投加量为0.2 g/L,PMS浓度为2 mmol/L时,反应时间150 min,采用可见光降解TC的降解率可到达99.8%(K=0.06774 min^(-1))。由此可见其在处理抗生素废水方面具有良好的应用前景。

A cobalt-doped carbon nitride matrix composite was prepared using cobalt chloride and 3-amino-1,2,4-triazole as raw materials through solid-phase pyrolysis.The composite material was used for visible light photocatalytic degradation of tetracycline(TC)in water with potassium peroxide mono sulfate(PMS)activator.XRD,SEM,FT-IR and other characteristics of the prepared cobalt-doped carbon nitride based catalytic materials were analyzed.The reasons why the catalytic material performs better in degrading TC than a single catalyst were analyzed from the aspects of crystal structure,microstructure,chemical composition,etc.Additionally,the effects of factors such as catalyst dosage,PMS dosage,initial TC concentration,and different mass ratios of catalyst on the degradation efficiency of TC were investigated.The experimental results show that the cobalt-doped carbon nitride-based composites activated with PMS for TC degradation,with a cobalt doping level of 1.2%in C_(3)N_(5),a dosage of 0.2 g/L,a PMS concentration of 2 mmol/L,and a reaction time of 150 minutes under visible light,can achieve a degradation rate of tetracycline of up to 99.8%(K=0.06774 min^(-1)).It can be seen that it has a good application prospect in the treatment of antibiotic wastewater.