AAO模板法制备Pd-Ni合金纳米线  

Preparation of Pd-Ni Alloy Nanowires by AAO Template

作　　者：王金银[1] 岳二红[1] 余刚[1] 肖耀坤[1] 陈宗璋[1] 

机构地区：[1]湖南大学

出　　处：《稀有金属材料与工程》2007年第1期126-129,共4页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(20373015);湖南省教育厅项目(04C033)联合资助

摘　　要：在孔深60gm，直径200nm的通孔氧化铝模板中，用60mmol·dm^-3。Pd（NH3）4Cl2＋40mmol·dm^-3NiSO4·6H2O＋0．2mol·dm^-3NH4Cl，pH8．5和70mmol·dm^-3。Pd（NH3）4Cl2＋30mmol-dm^-3NiSO4·6H2O＋0．2mol·dm^-3NH4Cl，pH8.5的2种电解液，采用直流电沉积的方法制备钯镍合金纳米线阵列。借助扫描电子显微镜（SEM）和X-射线能谱仪（EDX）表征纳米线的形貌和成分。结果表明，用-0．6V～-0．8V（vsSCE）的直流电沉积，在氧化铝（AAO）模板中可以成功地制备出镍含量在8％～15％（质量分数，下同）之间的Pd-Ni合金纳米线有序阵列，其直径和模板的孔径是一致的。沉积电势负移将使得电流密度增加，有利于合金中电势较负金属镍含量的增大。Pd-Ni alloy nanowires arrays were successfully prepared in the nanopores of porous anodic aluminum oxide （AAO） membrane with 200 nm in diameter and 60 μm in depth by DC electrochemical deposition technique. Two kinds of electrolytes, a pH 8.5 electrolyte composed of 60 mmol·dm^-3 Pd（NH3）4Cl2, 40 mmol·dm^-3 NiSO4·6H2O, 0.2 mol·dm^- 3 NH4Cl, and another pH 8.5 electrolyte of 70 mmol·dm^-3 Pd（NH3）4Cl2, 30 mmol·dm^-3 NiSO4·6H2O, 0.2 mol·dm^-3 NH4Cl, were adopted. Scanning electron microscopy （SEM） and Energy-dispersive X-ray analysis （EDX） were employed to characterize the morphologies and the compositions of Pd- Ni alloy nanowires, repectively. The research results show that Pd-Ni alloy nanowire arrays with 8wt%-15wt% nickel content can be successfully fabricated by applying the potential ranging from -0.6 V-0.8 V （vs SCE）, and the diameters of alloy nanowires are equal to the diameters of the AAO nanopores. The more negative of the electrodoposition potentials will cause to the increase of current density, which benefits the increases of the Ni content with more negative potential.

关 键 词：Pd-Ni 合金纳米线 AAO模板 电沉积 

分 类 号：TB383.1[一般工业技术—材料科学与工程]