CeO2,CeO2/BiOBr,CeO2/CNTs and CeO2/BiOBr/CNTs nano composite catalysts are synthesized via a hydrothermal method.The structure,morphology,and texture characteristics of as-prepared nano composite are characterized by means of XRD,SEM,BET and UV-Vis methods.Their performances in photocatalytic degradation of antibiotics are studied under the irradiation of long arc xenon lamp.It is indicated by the results that both CeO2/BiOBr and CeO2/CNTs exhibit a better degradation effect on antibiotics than CeO2 because of the synergistic effect between CeO2 and BiOBr,CeO2 and CNTs.CeO2/BiOBr/CNTs displays higher absorption performance for antibiotics and visible light,and delivers higher degradation efficiency than CeO2/BiOBr and CeO2/CNTs.The·OH active groups generate in weakly alkaline environment,resulting in a good catalytic effect of the as-prepared composite.Band gap widths of the composite are all within the visible light range.The addition of CeO2 helps the composite to improve its light utilization efficiency,enhancing its adsorption and electron hole pair migration efficiency,thereby increasing its photocatalytic activity.It is shown through the recovery desorption experiment that CeO2/BiOBr/CNTs composite has good stability.
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