An in situ ATR-FTIR study of the adsorption kinetics of xanthate on germanium

被引：20
|
作者：
Fredriksson, Andreas [1 ]
Holmgren, Allan [1 ]
机构：
[1] Lulea Univ Technol, Div Chem, S-95187 Lulea, Sweden
来源：
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | 2007年 / 302卷 / 1-3期
关键词：
in situ adsorption; kinetics; ATR-FTIR; XPS; germanium; xanthate;
D O I：
10.1016/j.colsurfa.2007.02.005
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The in situ adsorption of n-heptyl xanthate on a germanium multiple internal reflection element was studied at constant ionic strength and X-ray photoelectron spectroscopy was used in the investigation of the germanium surface. The kinetics of heptyl xanthate adsorption was evaluated using the integrated absorbance of a sub-band under the vibration at 1200 cm(-1). This vibration was assigned to the adsorbed xanthate molecule. It was shown that the adsorption of heptyl xanthate can be represented by a pseudo-first-order rate law and a monodentate binding of the xanthate to the germanium surface is proposed. During the adsorption of xanthate, the dimeric form of xanthate was simultaneously formed. (C) 2007 Elsevier B.V. All rights reserved.
引用
收藏
页码：96 / 101
页数：6
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