Three-dimensional hierarchical Co3O4 microstructures decorated with Ag and Cu oxides were prepared via displacement reaction and subsequent annealing treatment.Photocatalytic properties measurements revealed that the ...Three-dimensional hierarchical Co3O4 microstructures decorated with Ag and Cu oxides were prepared via displacement reaction and subsequent annealing treatment.Photocatalytic properties measurements revealed that the photocatalystic activities of Cu O/Co3O4 composites（Co3O4 microstructures decorated with Cu O）were enhanced while those of Ag2O/Co3O4 composites（Co3O4 microstructures decorated with Ag2O）were reduced,when compared with those of pure hierarchical Co3O4 microstructures toward the degradation of methyl orange.In addition,Cu O/Co3O4 composites exhibited an excellent recyclability ability of photodegradation.The electrochemical properties test indicated that both of the composite oxide electrodes exhibited excellent pseudocapacitive performance with relatively high specific capacitance and good long-term cycling stability.With the increase of the loaded Ag2O and Cu O dosages deposited on the Co3O4 microstructures surface,the specific capacitance values of the composites were increased.Ag2O/Co3O4 composite electrodes showed higher specific capacitance values and better cycling stability than Cu O/Co3O4 composite ones.展开更多
基金Funded by the National Natural Science Foundation of China(Nos.11374013 and 51672001)the Key Fund of Anhui Province(16030901039)+1 种基金the Outstanding Young Talent Fund of Anhui Province(J05201424)the Internation Cooperation Fund of Anhui Province(1704e1002209)
文摘Three-dimensional hierarchical Co3O4 microstructures decorated with Ag and Cu oxides were prepared via displacement reaction and subsequent annealing treatment.Photocatalytic properties measurements revealed that the photocatalystic activities of Cu O/Co3O4 composites（Co3O4 microstructures decorated with Cu O）were enhanced while those of Ag2O/Co3O4 composites（Co3O4 microstructures decorated with Ag2O）were reduced,when compared with those of pure hierarchical Co3O4 microstructures toward the degradation of methyl orange.In addition,Cu O/Co3O4 composites exhibited an excellent recyclability ability of photodegradation.The electrochemical properties test indicated that both of the composite oxide electrodes exhibited excellent pseudocapacitive performance with relatively high specific capacitance and good long-term cycling stability.With the increase of the loaded Ag2O and Cu O dosages deposited on the Co3O4 microstructures surface,the specific capacitance values of the composites were increased.Ag2O/Co3O4 composite electrodes showed higher specific capacitance values and better cycling stability than Cu O/Co3O4 composite ones.
