通过化学还原法将船纳米粒子担载到锐钳TiO2(B)双晶材料上,并将其作为表面增强拉曼散射(SERS)基底,用于有机探针分子4-巯基苯甲酸的痕量检测。研究表明:双晶氧化钛特殊的能带结构有利于光响应过程中电子一空穴的定向转移,从而比纯锐钛矿具有更优异的电子转移能力,因此能够得到更佳的SERS性能。这种现象表明,双晶氧化钛材料是SERS技术应用到检测领域的理想载体。
The silver(Ag) nanoparticles were loaded on bicrystalline ( anatase/TiO2 (B) ) materials by chemical reduction methods, which was then used as surface-enhanced Raman scattering substrate for the detection of trace 4-mercaptobenzoic acid( 4-MBA), an organic probe. The results showed that bicrystalline TiO2 had a specific energy band structure, which was favor to directional transfer of electrons and holes, so it had a more efficient charge trans- fer capability than the pure anatase. Thus, the better SERS performance was observed on Ag/( anatase/TiO2 (B) ) substrates. Therefore the bicrystalline TiO2 is an ideal carrier for the appli- cation of SERS technology in determination and test area.