吡啶-氯化钾水溶液/n型硫化镉电极界面上的表面增强喇曼散射

本文研究了在吡啶-KC1水溶液中吡啶吸附在n-CdS电极上的表面增强喇曼散射(SERS)。在光照下,CdS电极经过正极化予处理数分钟,就能观察到吡啶吸附在CdS电极上的很强的SERS谱。其特征峰是1010和1036cm^-1与纯吡啶的喇曼特征峰991,1030cm^-1相比有了明显位移。又SERS谱随着吡啶浓度的增加而增强。外加电位对SERS也有一定影响,其曲线形状与CdS的I～V曲线很相似。对这些实验结果,本文用n型CdS电极的光电化学特性进行了初步的考察和讨论。

SURFACE ENHANCED RAMAN SCATTERING OBSERVED ON THE INTERFACE OF PYRIDINE-KC1 AQUEOUS SOLUTION/n-CdS ELECTRODE

The surface enhanced Raman scattering (SERS) of pyridine adsorbed on a n-CdS electrode in an aqueous KC1 solution has been stud ied. When the CdS electrode was first subjected to anodization for ca. 5 min under illumination, the two strong peaks at 1010 and 1036 cm^-2 in the SERS spectrum of the adsorbed pyridine were observed. Compared with the characteristic peaks (at 991 and 1030 cm^-1) in the Raman spectrum of pure pyridine they show obvious shifts. The surface Raman signal intensity was enhanced with increasing pyridine concentration. The effect of applied electrode potential on the SERS was also investigated. It shows that shape of its curve is similar to the I-V curve measured on the CdS electrode. The above results were briefly explained and discussed.