In this study,Mn-based bimetallic oxide catalysts were synthesized via the solvothermal method.Different metals(Ce,Co and Fe)exhibited a great impact on the physicochemical properties of catalysts,resulting in differe...In this study,Mn-based bimetallic oxide catalysts were synthesized via the solvothermal method.Different metals(Ce,Co and Fe)exhibited a great impact on the physicochemical properties of catalysts,resulting in different catalytic activities for the simultaneous removal of 1,2-dichlorobenzene(1,2-DCB)and furan,as a model of polychlorinated dibenzodioxins and dibenzo-furans(PCDD/Fs).Fe–MnOx presented the best catalytic activity,with a removal efficiency of 62%for 1,2-DCB and 100%for furan at 240℃.Several analytical techniques were employed,namely,Brunauer–Emmett–Teller(BET),X-ray diffraction(XRD),scanning electron microscope(SEM),X-ray photoelectron spectroscopy(XPS),H_(2)temperature-programmed reduction(H_(2)-TPR),and ammonia temperature programmed desorption(NH_(3)-TPD).Compared with pure MnOx catalysts,Fe–MnOx shows a higher specific surface area of 117.9 m^(2)/g.SEM observations showed flower-like nanosheet structures for Fe–MnOx.XPS analysis indicated that Mn^(4+)/Mn^(3+)and active oxygen play the key roles in the catalytic oxidation of 1,2-DCB and furan.The catalytic activity,selectivity and stability of Mn-based bimetallic oxide catalysts for the oxidation of 1,2-DCB and furan were tested.Competition exists between 1,2-DCB and furan such that the adsorption of furan occurs prior to 1,2-DCB.展开更多
基金supported by the Natural Science Foundation of Zhejiang Province(No.LY21E060007)the National Natural Science Foundation of China(No.51976192,No.52006191).
文摘In this study,Mn-based bimetallic oxide catalysts were synthesized via the solvothermal method.Different metals(Ce,Co and Fe)exhibited a great impact on the physicochemical properties of catalysts,resulting in different catalytic activities for the simultaneous removal of 1,2-dichlorobenzene(1,2-DCB)and furan,as a model of polychlorinated dibenzodioxins and dibenzo-furans(PCDD/Fs).Fe–MnOx presented the best catalytic activity,with a removal efficiency of 62%for 1,2-DCB and 100%for furan at 240℃.Several analytical techniques were employed,namely,Brunauer–Emmett–Teller(BET),X-ray diffraction(XRD),scanning electron microscope(SEM),X-ray photoelectron spectroscopy(XPS),H_(2)temperature-programmed reduction(H_(2)-TPR),and ammonia temperature programmed desorption(NH_(3)-TPD).Compared with pure MnOx catalysts,Fe–MnOx shows a higher specific surface area of 117.9 m^(2)/g.SEM observations showed flower-like nanosheet structures for Fe–MnOx.XPS analysis indicated that Mn^(4+)/Mn^(3+)and active oxygen play the key roles in the catalytic oxidation of 1,2-DCB and furan.The catalytic activity,selectivity and stability of Mn-based bimetallic oxide catalysts for the oxidation of 1,2-DCB and furan were tested.Competition exists between 1,2-DCB and furan such that the adsorption of furan occurs prior to 1,2-DCB.
