Preparation of Bi2O3/NiF photoelectrode with microwave irradiation and efficient photoelectrocatalytic degradation of RhB under simulated sunlight
In order to solve the problems of low light utilization efficiency and difficult recovery and reuse of powder Bi2O3 photocatalyst,Bi2O3/NiF electrode was prepared with impregnation-microwave radiation hybrid technology,and its characterizations such as SEM,XRD,XPS and electrochemical properties were used to analyze the morphology,chemical structure and photoelectrocatalytic performance.Experimental results displayed that the flower-shaped Bi2O3 was successfully loaded on the surface of three-dimensional framework NiF,and it exhibited excellent photoelectric conversion efficiency.Photoelectrocatalytic degradation efficiency was about 95.35％when the photocurrent density was 15μA/cm2,initial voltage was 2V,RhB concentration was 8mg/L and pH value was 3.Bi2O3/NiF photoelectrocatalytic degradation of RhB fitted well with the first-order reaction kinetics.Furthermore,the free radical trapping test confirmed that h+played a major role in the process of Bi2O3/NiF photoelectrocatalytic degradation of RhB.
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