An experimental study on catalytic degradation of chlorophenasic acid by compound modified nano-TiO2
In order to investigate the dynamic characteristics of nano C-Co/TiO2 catalyst degrading chlorophenasic acid,compound modified nano C-Co/TiO2 doped with carbon and cobalt was prepared by sol-gel method.Using XRD,SEM-EDS,UV-vis to characterize and analyze the said compound catalyst,the results showed that,after doping C and Co,the crystal pattern of nano C-Co/TiO2 was unchanged,the characteristic peak intensity increased,the crystal crystallinity was good,and the grain diameter was 12.08 nm.The surface of the catalyst appeared spherical accumulation shape,the specific surface area was large,which was of benefit to the adsorption and desorption of the reactant.Compared to pure TiO2,the said catalyst had lower band-gap energy,and stronger responsibility to visible light.According to the ultraviolet absorption spectra of the products during the degradation process,the catalytic degradation mechanism of chlorophenasic acid was investigated.Based on the measurement result of the experiment,the linear relationship between the initial concentration and the degra-dation rate was analyzed;besides,the L-H model kinetic equation of photocatalytic degradation of chlorophenasic acid was obtained:r0=0.384 91 0.095 1 c0/1+0.095 1 c0
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