Preparation Of Electrospun Nanofibers Electrode And Investigation On Propranolol Degradation

With the rapid development of China’s chemical and pharmaceutical industries,pharmaceuticals and personal care products have become a new class of difficult-to-biodegradable environmental pollutants.The electrocatalytic oxidation technology has received extensive attention in the field of treating difficult biodegradable pollutants due to its unique advantages.This research innovatively combines electrospinning technology to successfully prepare G/Sn O2 composite carbon fiber anodes(MCFs)and g-C3N4 composite carbon fiber photoelectrodes(CNCFs).We optimized the reaction conditions while investigating the removal effect of the prepared electrode on PRO and its influencing factors.It is expected to provide new ideas for the selection and preparation of electrode materials.The hydrothermal method was used to prepare stable G/Sn O2 nanocomposites in an alkaline environment.At the same time,the electrospinning technology was used to spin PAN-doped G/Sn O2 carbon fiber felts.G/Sn O2 composite carbon fiber anodes(MCFs)were prepared through pre-oxidation and carbonization treatment.At the same time,the surface morphology,chemical composition,and microstructure of the MCFs anode were characterized and analyzed.The results of the degradation experiment show that the flow-through operation mode can make better use of the reactive sites of the electrode,and the high specific surface area can promote the pollutants to fully contact the anode.The adsorption and retention effects of MCFs anode on PRO are not obvious.The removal of PRO mainly depends on the direct oxidation of the electrode surface,and the indirect oxidation accounts for less.When loading about 80 mg of MCFs,after8 h of treatment,the removal rate of PRO by the prepared anode can reach 82.6%.Innovative tableting method was used to disperse the dispersed high-temperature carbonized carbon fibers and graphite-phase carbon nitride(g-C3N4)on a titanium mesh to prepare self-supporting photo-anodes(CNCFs).At the same time,the microstructureand element morphology of electrode materials were characterized and analyzed.The results of degradation experiments using the prepared electrodes show that the chemical reaction rate constant under photoelectric conditions is much higher than the chemical reaction rate under photocatalytic or electrocatalytic conditions alone,Improper PRO concentration and bias voltage between cathode and anode will affect the catalytic reaction rate of CNCFs photoelectrode to PRO.The initial PRO concentration of 2mg/L and bias voltage of 2V are more suitable reaction parameters.Under this condition,The PRO removal rate in 90 min can reach 98.7%.