Study On The Preparation Of Porous Carbon Electrodes From Waste Corrugated Paper And Their Electrocatalytic And Superelectric Properties

Biomass carbon materials are widely used in the field of electrochemistry due to their environmentally friendly and high electrical conductivity.In this paper,waste corrugated paper is selected as the biomass carbon precursor,and high-performance corrugated porous carbon?CPAC?is prepared by carbonization and KOH activation.It can be used in super capacitors and electrochemical advanced oxidation process?EAOP?,two areas.CPAC was used as the electrode material for supercapacitors,and the electrochemical performance of the materials under different conditions including different calcination temperatures,different activation ratios and other conditions were studied.The best sample CPAC-700 sample has a specific surface area of 1202.38 m²g^-1.According to the pore size analysis,it has a dense microporous structure.The interconnected channels provide a lot of space for charge storage on the material surface.In the three-electrode system with 6 M KOH electrolyte,when the current density is 1 A g^-1 and 10 A g^-1,the specific capacitance of the sample is 415.66 F g^-1 and 310 F g^-1,respectively.The capacitance retention rate is 74.85%.In the two-electrode system,the specific capacitance is 248.48 F g^-1 and 179.58 F g^-1 when the current density is 1 A g^-1and 10 A g^-1 respectively.The capacitance retention rate can reach 72.26%.At a current density of 5 A g^-1 in a two-electrode system,5000 cycles.After the cycle,89.9%of the initial capacitance is maintained.It shows that CPAC samples are ideal supercapacitor materials.The CPAC sample is used as a cathode material for electrocatalytic degradation.Due to its ultra-high specific surface area and rich pore structure,it can accelerate the yield of H₂O₂,thereby promoting the generation of more strong oxidants·OH to improve the degradation efficiency.The degradation rate of phenol in 9 min was93.76%,and the COD decreased from 386.35 mg L^-1 to 44.07 mg L^-1 in 180 min.Ru O₂/CPAC composites were prepared by simple modification of CPAC samples by precipitation and calcination.Ru O₂/CPAC composites exhibited a higher specific surface area of 2379.09 m²g^-1.After 120 min of electrical degradation,the degradation rate of phenol was 98.76%.After 120 min of degradation,the COD decreased from306.35 mg L^-1 to 44.07 mg L^-1.