Adsorption study of 4-MBA on TiO2 nanoparticles by surface-enhanced Raman spectroscopy

被引：51
|
作者：
Yang, Libin [1 ,2 ]
Jiang, Xin [2 ]
Ruan, Weidong [1 ]
Zhao, Bing [1 ]
Xu, Weiqing [1 ]
Lombardi, John R. [3 ]
机构：
[1] Jilin Univ, State Key Lab Supramol Struct & Mat, Changchun 130012, Peoples R China
[2] Jiamusi Univ, Coll Chem & Pharmacol, Jiamusi 154007, Peoples R China
[3] CUNY City Coll, Dept Chem, New York, NY 10031 USA
来源：
JOURNAL OF RAMAN SPECTROSCOPY | 2009年 / 40卷 / 12期
关键词：
SERS; charge transfer; adsorption; TiO2; 4-MBA; PHOTOCATALYTIC PROPERTIES; SCATTERING; DYE; MOLECULES; SILVER;
D O I：
10.1002/jrs.2358
中图分类号：
O433 [光谱学];
学科分类号：
0703 ; 070302 ;
摘要：
In this paper, the adsorption of 4-mercaptobenzoic acid (4-MBA) on TiO2 nanoparticles was studied mostly by surface-enhanced Raman spectroscopy (SERS) and UV-vis spectroscopy, at different pH values as well as under different temperatures and concentrations. The results show that the 4-MBA molecules are bonded to the TiO2 surface both through the sulfur atoms and COO- groups at neutral or alkaline pH, but only through the sulfur atom at acidic pH. Furthermore, the 4-MBA molecules possess high adsorptive stability on TiO2 at a comparatively high temperature (150 degrees C). Concentration-dependent SERS experiments show that the saturation concentration for 4-MBA adsorbed on TiO2 is about 10(-3) M in natural case (pH = 6). Copyright (C) 2009 John Wiley & Sons, Ltd.
引用
收藏
页码：2004 / 2008
页数：5
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