| In this study, some ferrite spinel precursors were prepared by coprecipitation method, the catalysts were labeled as bare CoFe2O4, 2-GO-CoFe2O4, 5-GO-CoFe2O4 and 10-GO-CoFe2O4 by different GO loadings ?0%,2%,5% and 10%? in catalysts. CoFe2O4,nanoparticles accumulation and 5-GO-CoFe2O4 which is layer structure were showed by SEM and TEM.The surface area of the catalysts increased through the participation of graphene oxide,the average aperture concentrated in 3 ? 5 nm.Decided there was Fe,and Co andelement in 5-GO-CoFe2O4 by EDS, and The proof of in situ synthesis method was attributed to the 5-GO-CoFe2O4 by XPS. In addition, some organic groups such as -OH, -COO, -O- were observed by FT-IR. All above, illustrated CoFe2O4 and graphene oxide to be mixed together steadily.All the materials were tested though the degradation of DBP in water.It was found that 5-GO-CoFe2O4 presented highest activity in activating PMS to produce sulfate radicals for degradation of DBP and could be separated with a magnet without any loss. Through a great deal of different conditional experiments,a optimum condition for atalytic reaction system was found, [DBP]0=2 ?mol/L, [PMS]input=20 ?mol/L,[cata.]=0.1 g·L-1, Initial pH=7,T=20?. It was found that the catalysts have such characteristics as re-utilizing. After five times cycle experiments,the degradation of DBP had hardly changed.Free radical species in solution through a reasonable quenching experiment. SO4-· and · OH in the solution is the major group to degrade DBP. The degrmjadation mechanism and catalytic stability were comprehensively studied by analysis of radicals quenching experiments and deconvolution of XPS data.Import the conception ??[DBP] / [DBP]0?/ ??[PMS] / [PMS]0? to evaluate the utilization rate of the PMS. By comparing the utilization rate of PMS and the degradation rate of DBP,a new way to add catalysts was developed. By this way, utilization rate of PMS is promoted along with good result on DBP degradation. |
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