Electrochemical And Photocataltic Degradation Properties Of CuO@Cu Foam Composites

The CuO@Cu foam composite materials have been successfully prepared by anodizing and cyclic voltammetry method.The morphology evolution of the composites with different fabrication process were studied.Then,the relationship between the distinct morphologies and its resultant electrochemical as well as degradation properties was explored.The prospect in which the composites can be applied in supercapacitor,lithium ion battery and degradation fields were researched.The composite samples can be prepared by a facile fabrication steps,which certainly facilitate their commercialization.Compared with other materials,it have shown many advantages as following:(1)For electrode materials: a)The excellent conductivity of composite can accelerate the migrate and transfer of electron;b)The multilevel pore structure can inhibit the fast volume expansion and increase its specific surface area;c)The integrality of the composites has provided a facile utilization,which avoids the extra adding of conductive agent and binder;(2)For photocatalytic materials,the as-prepared composites can be highly recycled and achieve good light transmittance as well as the simple recovery process.The varies morphology of CuO,including nanobuds,sawdust-like nanosheets,nanoleaves and nanowires,were fabricated on Cu foam.And it was observed there were a great of uniform nanopores on the nanowires,which with the pores formed nanowires entwining together and the pores of Cu foam constituted the multilevel-pores structure.Therefore,the CuO composite materials of multilevel-pores structure was prepared successfully.It was confirmed that the composites consisted of Cu foam and in-situ nanostructured CuO by XRD and XPS.From the circulation voltampere curves of the samples under anodizing with different processes,it was seen that the optimal sample was fabricated under the parameters of 10 min,1 M KOH,20? and 10 m A cm-2.In this condition,the area specific capacity is 473.7 m F cm-2(corresponding quality specific capacity is 364.4 g F-1)and the microstructure presented nanowires length is about 7.1 ?m and width is about 200 nm.The Li-ion storage performance of the optimal sample as anode materials in Li-ion batteries was further explored.The reversible capacity is still maintained at 461.5 m Ah g-1 after 100 cycles at 100 m A g-1,.Compared with the previous researches,it has high capacity and excellent cycle stability.Four kinds of morphology of the samples,including nanobuds,sawdust-like nanosheets,nanoleaves and nanowires,were studied in the degradation of Rhodamine B with H2O2,nearly 100% of dyes were degraded after 110,90,80 and 60 min under the same conditions respectively.It is revealed that CuO nanowires showed the best degradation performance.