铜表面吡咯烷二硫代氨基甲酸铵自组装膜的拉曼光谱和缓蚀作用  

Raman spectrum and inhibition effect of self-assembled monolayers of ammonium pyrrolidine dithiocarbamate on copper surface

作　　者：岳忠文[1,2] 廖强强[1,2] 王作华[3] 李义久[3] 陈亚琼[1,2] 葛红花[1,2] 

机构地区：[1]上海电力学院上海高校电力腐蚀控制与应用电化学重点实验室,上海200090 [2]上海电力学院上海热交换系统节能工程技术研究中心,上海200090 [3]同济大学化学系,上海200092

出　　处：《中国有色金属学报》2010年第11期2213-2220,共8页The Chinese Journal of Nonferrous Metals

基　　金：上海市重点学科建设资助项目(P1304);上海高校电力腐蚀控制与应用电化学重点实验室开放基金资助项目(09KLSU01);上海热交换系统节能工程技术研究中心开放基金资助项目(09SERC03);上海市科委资助项目(08DZ2210800)

摘　　要：应用表面增强拉曼光谱(SERS)和电化学方法,对铜电极表面吡咯烷二硫代氨基甲酸铵(APDTC)的自组装单层结构、缓蚀性能和吸附行为进行研究。SERS光谱表明:APDTC分子通过硫原子垂直吸附在铜表面形成APDTC自组装单分子膜(APDTC SAMs)。交流阻抗和极化曲线实验表明:在3%NaCl(质量分数)溶液中APDTC SAMs对铜具有很好的缓蚀作用,最高缓蚀效率可达98%;APDTC的吸附行为符合Langmuir吸附等温式,吸附机理是介于化学吸附和物理吸附之间的一种吸附。The structure,corrosion inhibition and adsorption behavior of ammonium pyrrolidine dithiocarbamate（APDTC） self-assembled monolayers（SAMs） on a copper surface were investigated by surface-enhanced Raman scattering spectroscopy（SERS） and electrochemical methods.The results of SERS experiment show that APDTC SAMs is adsorbed on the copper surface by its S atoms with perpendicular orientation.The AC impedance and DC polarization results indicate that APDTC SAMs have good corrosion inhibition effects on copper in a 3% NaCl solution and its maximum inhibition efficiency can reach 98%.Adsorption of the APDTC SAMs is found to follow the Langmuir′s adsorption isotherm and the mechanism consists of a mixed adsorption between chemisorption and physisorption.

关 键 词：铜 吡咯烷二硫代氨基甲酸铵 拉曼光谱 自组装单分子膜 缓蚀 吸附 

分 类 号：O646.6[理学—物理化学]