Preparation of Non-noble Metal Catalytic Electrode Ni/C@CF and Its Green Fenton Performance
The traditional Fenton process uses Fe2+ to catalyze H2O2 to produce strong oxidizing hydroxyl radical(·OH),which can efficiently oxidize and degrade organic matter.However,its operating pH range is narrow(pH:ca.3),the production of iron flocculation precipitation and other shortcomings limit its application and development.Atomic hydrogen H*,as a single electron donor,can quickly transfer electrons to H2O2 to generate·OH,which is suitable for a wide range of pH values and does not produce iron sludge,and is an efficient green Fenton method.However,H* atoms are more likely to combine with each other to form H2,which is extremely unstable.Therefore,exploring suitable electrocatalysts plays a crucial role in the application of H* green Fenton.In this paper,Ni/C@CF electrocatalytic material with high catalytic activity and stable performance was successfully prepared by liquid phase reduction method using carbon black as the carrier.The prepared Ni nanoparticles were uniformly dispersed on carbon black.Using this electrode material as the cathode,a green Fenton catalytic system is constructed,which can catalyze water molecules(H2O)and hydrogen ions(H3O+)to produce H*,so that it can catalyze the decomposition of H2O2 to produce·OH,thus achieving the effect of degrading antibiotic pollutants.By adjusting the preparation method such as voltage,pH value of solution and the additional oxidation dose,the optimal reaction conditions of Ni/C catalyst degradation in this system were determined.In addition,Ni/C@CF composite material has good stability and can be recycled to realize rapid oxidation of green Fenton technology,which has many potential practical applications in wastewater treatment.
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