纳米多孔铜带的制备及表征

以Cu15Al85合金薄带为前驱体，采用去合金化法，制备孔结构单一、均匀且三维贯通的纳米多孔铜（NPC），研究不同去合金腐蚀液和退火处理条件对样品微观形貌的影响。经场发射扫描电镜（FE-SEM）、X-射线衍射（XRD）和能谱仪（EDS）对 NPC 检测，结果表明：与在 w（HCl）=5%的酸性腐蚀液中自由腐蚀去合金化得到的 NPC 相比，经 w（NaOH）=5% 的碱性腐蚀形成的 NPC 的多孔结构更加完整，孔径由150 nm 减小到100 nm，孔壁由40 nm 减小到10 nm；对前躯体合金薄带进行退火处理后，去合金化形成的 NPC 多孔形貌更加完整均一，孔径尺寸由 150 nm 减小到 100 nm。

Preparation and Characterization of Nanoporous Copper Ribbons

Nanoporous copper(NPC) ribbons were synthesized by free corrosion dealloying of Cu15Al85 alloy ribbons.The effects of etching solution and annealing process on the dealloying process and micro-morphology of NPC were investigated.The components and microstructures of NPC were characterized by utilizing field emission scanning electron microscopy(FE-SEM),X-ray diffraction(XRD) and energy dispersive X-ray analysis(EDS).XRD analyses show that,compared with those dealloyed in the same concentration of HCl solution,the porous structure of NPC dealloyed in w(NaOH)=5% solution is more complete,and the pore/wall sizes reduce from 150/40 nm to 100/10 nm.Furthermore,the porous structure of NPC is more complete and uniform when the precursor alloy is annealed,and the pore size also decreases from 150 nm to 100 nm.