Catalytic Ozonatinon Of DBP Degradation By Using GO/MnFe₂O₄ Nanofiber

Herein, different rGO/MnFe₂O₄ composite nanofiber catalyst were synthesized by electrospin and calcined to remove DBP in water, which is a typical kind of environmental endocrine disruptors. Using SEM, TEM, EDS, FT-IR, XRD, BET and other modern test methods to characterize the various catalysts morphology, crystal structure, elements composition, and surface functional groups. Meantime, Studying the different catalysts adsorption and the removal of DBP, and the dosage of catalyst, initial pH, concentration of DBP and other factors on the catalytic effect of ozone to remove organic compounds in water.The reuse of catalyst performance and the stability of metal ions were studied. Discussting the mechanism of DBP removal of catalytic ozonation by the experiments of radicals quenching experiments and CV, EIS, XPS analysis.The content of graphene in the catalyst and their calcination temperature will affect the surface morphology, crystal integrity, specific surface area and the pore size distribution of the catalyst. The catalyst's pore size smaller overall and the distribution tends to be more focused most of concentrated in the emergence of a 40 nm place when the mass fraction of ultra-small graphene oxide is 5%. When the catalytic system have lower initial concentration of DBP, the pH of the catalytic system are nearer to neutral, the 5%rGO/MnFe₂O₄ catalyst dosage is 0.01 g-L-1, the DBP has the highest rate of removal. And this catalyst has good stability in catalyticozonation, DBP removal rate compared to the first time decreased only 4% after the experiment was repeated five times, but the catalyst in the catalytic persulfate showing the worse catalytic performance and stability, The catalytic ozonation mechanism of 5%rGO/MnFe₂O₄ removal of the DBP is surface hydroxyl groups theory by radicals quenching experiments and CV, EIS, XPS analysis.