In situ vibrational spectroscopic studies of the CaF2/H2O interface

被引：90

作者：

Becraft, KA ^{[1
]}

Richmond, GL ^{[1
]}

机构：

[1] Univ Oregon, Dept Chem, Eugene, OR 97403 USA

来源：

LANGMUIR | 2001年 / 17卷 / 25期

关键词：

D O I：

10.1021/la011133g

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

In these first vibrational sum frequency spectroscopy studies of the CaF2/H2O interface conducted under varied aqueous phase composition, large changes in the water structure and surface composition have been found. As the pH of the aqueous phase is adjusted from acidic to basic, dramatic changes in the orientation and hydrogen bonding structure of the water molecules are observed, in addition to the clear presence of surface hydroxide species at high pH. Fundamental studies of the pH-dependent behavior of hydrous fluorite surfaces are essential for understanding the reaction mechanisms involved in calcium mineral flotation systems.

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页码：7721 / 7724

页数：4

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