高等学校化学学报2012，Vol.33Issue(11)：2516-2520,5.DOI:10.7503/cjcu20120183
TiO2电极表面氰基吡啶吸附的电化学SERS光谱
Electrochemical SHINERS Spectroscopic Studies on Adsorption of 4-CNPy at TiO2 Electrodes
摘要
Abstract
Based on the shell-isolated nanoparticles-enhanced Raman spectroscopy(SHINERS) and naked Au nanoparticles SERS technology, the adsorption behavior of 4-cyanopyridine(4-CNPy) on a TiO2 electrode was investigated. The difference in the spectral features from SHINERS and SERS was observed. The SHINERS results showed that the adsorption orientation of 4-CNPy changed with the applied potential. At the potential of 0 V, the 4-CNPy molecules adsorbed on TiO2 electrode by the N atom of pyridine ring in a vertical orientation. With the potential moving to more negative potential, partial molecules turned to a tilted mode. At -1.0 V, the angle of the tilted mode to the vertical line becomes large. At the potential above 0 V, it keeps constant as a vertical orientation by the N atom of pyridine. When the naked Au nanoparticles were attached to the TiO2 electrode, the obtained spectra were originated from the probe molecules adsorbed on the TiO2, naked Au nanoparticles and the TiO2/Au composition. It is difficult to distinguish the contribution of different adsorption sites.关键词
壳层隔绝纳米粒子增强拉曼/4-氰基吡啶/核壳结构/TiO2电极/SERS光谱/吸附Key words
Shell-isolated nanoparticles-enhanced Raman spectroscopy (SHINERS)/ 4-Cyanopyridine/Core-shell nanostructures/ TiO2 electrode/ SERS spectrum/ Adsorption分类
化学化工引用本文复制引用
刘可,徐敏敏,郭清华,姚建林,顾仁敖..TiO2电极表面氰基吡啶吸附的电化学SERS光谱[J].高等学校化学学报,2012,33(11):2516-2520,5.基金项目
国家自然科学基金(批准号:21073128,21033007,21173155)资助. （批准号:21073128,21033007,21173155）
