TiO_2,TiO_2/Ag表面吸附分子的表面增强拉曼散射光谱研究

STUDY OF SURFACE ENHANCED RAMAN SCATTERING OF MOLECULES ADSORBED ON TiO_2, TiO_2/Ag.

本文对TiO_2,TiO_2/Ag表面吸附分子的表面增强拉曼散射(SERS)效应进行了研究。首次详细报道了Cl^-对TiO_2,TiO_2/Ag表面SERS效应的影响,并通过实验证明了Cl^-与吸附分予在TiO_2表面活位点上发生竞争吸附,从而影响其SERS效应。

Some studies of surface enhanced Raman scattering (SERS) of molecules adsorbed on TiO_2, TiO_2/Ag were described. The results have shown that pyridine is adsorbed on TiO_2 and contacts with Ag. Cl^- has great influence on SERS effect on TiO_2, TiO_2/Ag because it forms surface complex with Ag, pyridine and it displays competitive adsorption with pyridine and quinoline on TiO_2. Also the Cl^- has greater influence on pyridine than on quinoline because of the difference between their π-electron charge distributions.