摘要： 通过化学还原法将Ag纳米粒子担载到锐钛/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-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。
关键词:
锐钛/TiO2(B)双晶,
表面增强拉曼,
电子转移,
检测
Abstract: 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.
Key words:
anatase/TiO2(B) bicrystalline,
surface enhanced Raman,
charge transfer,
detection
季兴宏, 浦绍瑞, 付双钦, 吴楠桦, 刘 畅, 陆小华. Ag/双晶TiO2作为表面增强拉曼散射基底的性能研究[J]. 涂料工业, 2014, 44(3): 14-18.
Ji Xinghong, Pu Shaorui, Fu Shuangqin, Wu Nanhua, Liu Chang, Lu Xiaohua. Surface-Enhanced Raman Scattering( SERS)Performance of Ag-(Anatase/TiO2(B)) Substrate[J]. Paint & Coatings Industry, 2014, 44(3): 14-18.