ATR-FTIR measurements and quantum chemical calculations concerning the adsorption and photoreaction of oxalic acid on TiO2

被引：107

作者：

Mendive, Cecilia B. ^{[1
]}

Bredow, Thomas

Blesa, Miguel A.

Bahnemann, Detlef W.

机构：

[1] Leibniz Univ Hannover, Inst Tech Chem, D-30167 Hannover, Germany

[2] Comis Nacl Energia Atom, Ctr Atom Constituyentes, Unidad Actividad Quim, RA-1650 San Martin, Buenos Aires, Argentina

[3] Leibniz Univ Hannover, D-30167 Hannover, Germany

[4] Univ Nacl San Martin, Escuela Postgrado, San Martin, Buenos Aires, Argentina

来源：

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2006年 / 8卷 / 27期

关键词：

D O I：

10.1039/b518007b

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 adsorption and photoreaction of oxalic acid on the surface of anatase and rutile TiO2 nanoparticles have been studied using a combined experimental and theoretical approach. In the dark, the experimental adsorption reaches an equilibrium state that can be described as a mixture of adsorbed water and oxalic acid molecules, with the latter forming two different surface complexes on anatase and one on rutile particles. When the system is subsequently illuminated with UV(A) light, the surface becomes enriched with absorbed oxalic acid, which replaces photo-desorbed water molecules, and one of the adsorbed oxalic acid structures on anatase is favoured over the other.

引用

页码：3232 / 3247

页数：16

共 76 条

[61] Protection of marbles against corrosion and microbial corrosion with TiO2 coatings [J].