In situ vibrational spectroscopic studies of the CaF2/H2O interface

被引：91

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.

引用

收藏

页码：7721 / 7724

页数：4

相关论文

共 24 条

[1] SUM-FREQUENCY VIBRATIONAL SPECTROSCOPY OF THE SOLID-LIQUID INTERFACE [J].

BAIN, CD .

JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS, 1995, 91 (09) :1281-1296

[2] ADSORPTION OF WATER-VAPOR BY CALCIUM-FLUORIDE, BARIUM FLUORIDE AND LEAD FLUORIDE [J].

BARRACLOUGH, PB ;

HALL, PG .

JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS I, 1975, 71 :2266-2276

[3] Metal oxide surfaces and their interactions with aqueous solutions and microbial organisms [J].

Brown, GE ;

Henrich, VE ;

Casey, WH ;

Clark, DL ;

Eggleston, C ;

Felmy, A ;

Goodman, DW ;

Grätzel, M ;

Maciel, G ;

McCarthy, MI ;

Nealson, KH ;

Sverjensky, DA ;

Toney, MF ;

Zachara, JM .

CHEMICAL REVIEWS, 1999, 99 (01) :77-174

[4]

CHOI HS, 1963, CAN METALL Q, V2, P410

[5] Ice/water interface: Zeta potential, point of zero charge, and hydrophobicity [J].

Drzymala, J ;

Sadowski, Z ;

Holysz, L ;

Chibowski, E .

JOURNAL OF COLLOID AND INTERFACE SCIENCE, 1999, 220 (02) :229-234

[6] SURFACE VIBRATIONAL SPECTROSCOPIC STUDIES OF HYDROGEN-BONDING AND HYDROPHOBICITY [J].

DU, Q ;

FREYSZ, E ;

SHEN, YR .

SCIENCE, 1994, 264 (5160) :826-828

[7] VIBRATIONAL SPECTROSCOPY OF WATER AT THE VAPOR WATER INTERFACE [J].

DU, Q ;

SUPERFINE, R ;

FREYSZ, E ;

SHEN, YR .

PHYSICAL REVIEW LETTERS, 1993, 70 (15) :2313-2316

[8]

FUERSTENAU MC, 1976, GAUDIN MEMORIAL VOLU, V1

[9] Investigations of the structure and hydrogen bonding of water molecules at liquid surfaces by vibrational sum frequency spectroscopy [J].

Gragson, DE ;

Richmond, GL .

JOURNAL OF PHYSICAL CHEMISTRY B, 1998, 102 (20) :3847-3861

[10] Potential dependent alignment and hydrogen bonding of water molecules at charged air/water and CCl4/water interfaces [J].

Gragson, DE ;

Richmond, GL .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1998, 120 (02) :366-375