New Hybrid Properties of TiO2 Nanoparticles Surface Modified With Catecholate Type Ligands

被引：107

作者：

Jankovic, Ivana A. ^{[1
]}

Saponjic, Zoran V. ^{[1
]}

Dzunuzovic, Enis S. ^{[2
]}

Nedeljkovic, Jovan M. ^{[1
]}

机构：

[1] Vinca Inst Nucl Sci, Lab Radiat Chem & Phys, Belgrade 11001, Serbia

[2] Univ Belgrade, Fac Technol & Met, Dept Phys Chem & Electrochem, Belgrade 11120, Serbia

来源：

NANOSCALE RESEARCH LETTERS | 2010年 / 5卷 / 01期

关键词：

TiO2; nanoparticles; Surface modification; Catechol; Pyrogallol; Gallic acid; TITANIUM-DIOXIDE; CHARGE-TRANSFER; SALICYLIC-ACID; CERAMIC MEMBRANES; AQUEOUS-SOLUTIONS; CARBOXYLIC-ACIDS; GALLIC ACID; CHEMISORPTION; ADSORPTION; COMPLEXES;

D O I：

10.1007/s11671-009-9447-y

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Surface modification of nanocrystalline TiO2 particles (45 ) with bidentate benzene derivatives (catechol, pyrogallol, and gallic acid) was found to alter optical properties of nanoparticles. The formation of the inner-sphere charge-transfer complexes results in a red shift of the semiconductor absorption compared to unmodified nanocrystallites. The binding structures were investigated by using FTIR spectroscopy. The investigated ligands have the optimal geometry for chelating surface Ti atoms, resulting in ring coordination complexes (catecholate type of binuclear bidentate binding-bridging) thus restoring in six-coordinated octahedral geometry of surface Ti atoms. From the Benesi-Hildebrand plot, the stability constants at pH 2 of the order 10(3) M-1 have been determined.

引用

页码：81 / 88

页数：8

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