In situ infrared spectroscopic analysis of the adsorption of aromatic carboxylic acids to TiO2, ZrO2, Al2O3, and Ta2O5 from aqueous solutions

被引：231
作者：
Dobson, KD [1 ]
McQuillan, AJ [1 ]
机构：
[1] Univ Otago, Dept Chem, Dunedin, New Zealand
来源：
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY | 2000年 / 56卷 / 03期
关键词：
metal oxide; infrared spectroscopy; adsorption; carboxylic acids;
D O I：
10.1016/S1386-1425(99)00154-7
中图分类号：
O433 [光谱学];
学科分类号：
0703 ; 070302 ;
摘要：
In situ infrared spectroscopy has been used to investigate the adsorption of a range of simple aromatic carboxylic acids from aqueous solution to metal oxides. Thin films of TiO2, ZrO2, Al2O3 and Ta2O5 were prepared by evaporation of aqueous sols on single reflection ZnSe prisms. Benzoic acid adsorbed very strongly to ZrO2, in a bridging bidentate fashion, but showed only weak adsorption to TiO2 and Ta2O5. Substituted aromatic carboxylic acids; salicylic, phthalic and thiosalicylic, were found to adsorb to each metal oxide. Salicylic and phthalic acids adsorbed to the metal oxides via bidentate interactions, involving coordination through both carboxylate and substituent groups. Thiosalicylic acid adsorbed to the metal oxides as a bridging bidentate carboxylate with no coordination through the thiol substituent group. (C) 2000 Elsevier Science B.V. All rights reserved.
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收藏
页码：557 / 565
页数：9
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