纯钛电极上的表面增强拉曼光谱研究

采用机械粗糙、电化学氧化还原、化学刻蚀等方法对纯钛电极表面进行粗糙，在钛基底上获得了表面增强拉曼光谱(SERS)信号。初步的实验结果表明，采用机械粗糙和电化学氧化还原方法能够获得具有一定粗糙度的电极表面，但是该表面并不具有SERS活性。而采用氢氟酸化学刻蚀方法能够获得具有SERS活性的表面，并且成功检测到吡啶分子的表面增强拉曼信号。实验尝试了在不同条件下进行刻蚀，对酸的刻蚀浓度、刻蚀时间、外接电位等影响因素作了研究，结果发现基底的SERS活性随氢氟酸浓度增大而出现最佳条件，即氢氟酸浓度0.33 Wt%，刻蚀时间为5 min时的拉曼信号最好。实验以0.01 mol·L-1吡啶为探针分子，0.1 mol·L-1 KCl为电解质，在开路电位下成功地观察了钛电极上的表面增强拉曼光谱。

Studies of Surface-Enhanced Raman Spectroscopy on Bare Ti Electrode

Various roughening methods for the bare Ti electrode such as mechanical roughening,electrochemical oxidation-reduction method and chemical etching were tried to obtain surface-enhanced Raman spectra(SERS)successfully for the first time.The results of the experiments proved that mechanical roughening and electrochemical oxidation-reduction method could be successfully employed in roughening titanium electrode,however,surfaces roughened in such ways showed no SERS-activity in Raman detection.Finally,chemical ...