A carbon and lanthanum (C,La) doped and modified titanium dioxide (TiO2) catalyst was prepared by the sol-gel method,and prepared the core-shell shape by the coaxial electrospinning method with polyvinyl alcohol (PVA) as the template.The photocatalytic degradation effect of toluene gas under visible light was explored,and investigated the effects of catalyst loading,initial content of toluene and C/La doping on the degradation of toluene.XRD,SEM,XPS,DRS and TGA proved that C,La and TiO2 were successfully doped,and the optical absorption band edge of the modified catalyst was red-shifted,and the light absorption intensity in the visible light region was enhanced.The results of degrading toluene gas under visible light shown that when the spinning dope advancing speed was 2mL/h,the initial content of toluene was 3mL/L,and the C/La doping amount was 0.9g/0.6g,the reaction under visible light was 2h,the degradation rate of toluene can be as high as 92.9%.Repetitive experiments also shown that the degradation rate did not decrease significantly after 5 cycles of use,and the fiber membrane had good stability.
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基金资助
国家自然科学基金资助项目(31660482、51162022)
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