A series of copper cobalt composite oxides with different composition were synthesized by solid phase reaction using citric acid as a complex agent, and characterized with XRD, BET and TPR. The effects of the copper/c...A series of copper cobalt composite oxides with different composition were synthesized by solid phase reaction using citric acid as a complex agent, and characterized with XRD, BET and TPR. The effects of the copper/cobalt ratio on the crystal structure, specific surface area, reduction performance and catalytic activity of the catalyst for xylene combustion were studied. It was found that the catalytic activity of the catalyst has close relation with the copper/cobalt ratio. The interaction between copper and cobalt improved the specific surface area and reduction properties of the samples. The catalyst sample with n (Cu)/ n (Co)=1 has the largest specific surface area, the highest activity and the lowest reduction temperature. At the same time, the experimental results indicated that the spinel CuCo 2O 4 has high catalytic activity for xylene complete oxidation. The addition of opportune copper oxide promotes the CuCo 2O 4 dispersion on the composite oxide.展开更多
A spinel-type oxides ZnFe2O4 photocatalysts were prepared by citric acid complex method,and characterized with XRD,TG-DTA,FT-IR,TEM techniques.The photocatalytic activities were investigated by the degradation of C3H2...A spinel-type oxides ZnFe2O4 photocatalysts were prepared by citric acid complex method,and characterized with XRD,TG-DTA,FT-IR,TEM techniques.The photocatalytic activities were investigated by the degradation of C3H22N6O6S2Na2 by artificial visible Light.The results show that the photocatalytic activity of ZnFe2O4 is stable,under experimental conditions,the degradation rate of C3H22N6O6S2 is over 90% in 60min.展开更多
文摘A series of copper cobalt composite oxides with different composition were synthesized by solid phase reaction using citric acid as a complex agent, and characterized with XRD, BET and TPR. The effects of the copper/cobalt ratio on the crystal structure, specific surface area, reduction performance and catalytic activity of the catalyst for xylene combustion were studied. It was found that the catalytic activity of the catalyst has close relation with the copper/cobalt ratio. The interaction between copper and cobalt improved the specific surface area and reduction properties of the samples. The catalyst sample with n (Cu)/ n (Co)=1 has the largest specific surface area, the highest activity and the lowest reduction temperature. At the same time, the experimental results indicated that the spinel CuCo 2O 4 has high catalytic activity for xylene complete oxidation. The addition of opportune copper oxide promotes the CuCo 2O 4 dispersion on the composite oxide.
文摘A spinel-type oxides ZnFe2O4 photocatalysts were prepared by citric acid complex method,and characterized with XRD,TG-DTA,FT-IR,TEM techniques.The photocatalytic activities were investigated by the degradation of C3H22N6O6S2Na2 by artificial visible Light.The results show that the photocatalytic activity of ZnFe2O4 is stable,under experimental conditions,the degradation rate of C3H22N6O6S2 is over 90% in 60min.
基金The Research Project from Department of Science and Technology of Shandong Province(2012GGA01012)the Scientific Research Foundation for the Returned Overseas Chinese Scholars of State Education Ministry(2004-527)
