Preparation Of Fullerene Soot Activated Carbon Cathode And Study On Electrocatalytic Degradation Of Tetracycline

Tetracycline is a kind of antibiotic organic matter with huge scale of production and use.It is widely used in biological,medical and agricultural fields in clinic.However,traditional water treatment methods are difficult to effectively degrade tetracycline wastewater.In recent years,advanced oxidation technology category of electro-Fenton technology for the degradation of tetracycline wastewater provides a feasible approach,it is on cathode oxygen reduction reaction coupled with Fenton or Fenton-like reaction,thus generated in situ on cathode high oxidation potential of hydroxyl radicals,the organic molecules can be oxidized completely by hydroxyl radicals.Fullerenes soot is a by-product accompany with the production of fullerenes.It is an insoluble solid that remains after extracting soluble substances such as fullerenes and polycyclic aromatic hydrocarbons.With the fullerene is extensive applied and studied in energy,medical,biological and agricultural fields,its production scale is also expanding year by year.However,how to utilize the residual fullerene soot is still an unresolved problem.In view of this,this paper focuses on the resource utilization of fullerene soot and the development of advanced electro-Fenton catalyst.First,the fullerenes soot material containing fullerenes was prepared by the arc discharge method,and then the high value materials such as fullerenes were removed by extraction method.The residual fullerene soot was activated into fullerene soot activated carbon material(AFS)with large specific surface area by KOH activation method.The optimal preparation parameters were optimized by orthogonal degradation experiments.It was found that in the electrocatalytic degradation system with AFS as cathode,50 mg/L of tetracycline was effectively degraded 93%in 200 minutes.The related characterization results show that the defect structure of AFS and its oxygen-containing groups have special reactivity in electrocatalytic reaction.On this basis,Ni O-doped Ce O₂nanoparticles were prepared by co-precipitate method,and then loaded onto AFS by impregnation method to prepare 0.4(0.4Ni O-Ce O₂)-AFS composites.The characterization analyses and DFT calculation results showed that AFS as a cocatalyst could effectively initiate the synergistic effect between Ni O and Ce O₂.In the electrocatalytic degradation system constructed with 0.4(0.4Ni O-Ce O₂)-AFS as cathode,200 mg/L of tetracycline was almost completely degraded in 200 minutes.