中文摘要：

离子液体作为一种绿色介质,在电化学领域的应用研究正在兴起,并已引起了研究者的浓厚兴趣。运用循环伏安法研究了离子液体（1-丁基-3-甲基咪唑硝酸盐,[bmim]NO3）添加剂存在时,AgNO3溶液中的Ag在玻碳电极上的电化学沉积行为。研究表明,离子液体的加入对Ag的沉积具有阻化作用。采用扫描电镜（SEM）对沉积层的表面形貌进行表征,结果显示离子液体的存在可使沉积层更加致密,Ag颗粒的尺寸减小。以甲基橙为探针分子,研究了在加入及不加[bmim]NO3添加剂的AgNO3溶液中电沉积所得银颗粒膜的表面增强拉曼散射（SERS）效应,增强因子分别为1.7×10^5和1.1×10^5,表明在离子液体存在下制得的Ag颗粒膜具有相对较好的SERS活性。

英文摘要：

In the present work,the electrochemical deposition of silver was investigated on a glassy carbon electrode from AgNO3 solutions in the presence of RTILs （1-butyl-3-methyl imidazolium nitrate,[bmim]NO3） additive by cyclic voltammetric technique,scanning electron microscope （SEM） and X-ray photon spectroscopy （XPS）. For comparison,the electrodeposition of silver from [bmim]NO3-free AgNO3 solution was also investigated. The voltammograms showed that the cathodic peak potential shifted toward more negative potential and the cathodic peak current decreased when 5×10^-6 mol·L^-1 [bmim]NO3 was added into AgNO3 solutions. This indicated that [bmim]NO3 produced an inhibition of silver deposition,probably related to the adsorption of [bmim]NO3. SEM images showed that the uniform,shining electrodeposits of silver obtained in AgNO3 solutions were rather compact and that the size of silver grains decreased with the addition of [bmim]NO3 additive. The surface-enhanced Raman scattering （SERS） activities of silver deposits were measured by using methyl orange （MO） as the probe molecules. The strongly enhanced Raman scattering from the monolayer film of MO demonstrated that the as prepared silver particular film was SERS active. The enhancement factor was calculated to be up to 1.7×10^5 and 1.1×10^5 for silver film obtained in AgNO3 solutions with and without [bmim]NO3 additive,respectively.