Particle-Size-Dependent Distribution of Carboxylate Adsorption Sites on TiO2 Nanoparticle Surfaces:  Insights into the Surface Modification of Nanostructured TiO2 Electrodes

Size-dependent surface binding forms of the carboxylic group on the surface of TiO2 nanoparticles were investigated by a surface-binding transient probe molecule all-trans-retinoic acid (ATRA), where the excited triplet-state probe molecule generated by a photoinduced interfacial charge recombinatio...

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Bibliographic Details
Published in:The journal of physical chemistry. B 2004-09, Vol.108 (39), p.15077-15083
Main Authors: Zhang, Qing-Li, Du, Lu-Chao, Weng, Yu-Xiang, Wang, Li, Chen, Han-Yuan, Li, Jian-Qi
Format: Article
Language:English
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Summary:Size-dependent surface binding forms of the carboxylic group on the surface of TiO2 nanoparticles were investigated by a surface-binding transient probe molecule all-trans-retinoic acid (ATRA), where the excited triplet-state probe molecule generated by a photoinduced interfacial charge recombination for the adsorbed monolayer acts as a reporter for the different surface binding forms. Different TiO2 nanoparticles of varying sizethat is, 6, 0.8−1.4, and 0.7 nmwere prepared, and their physical properties were examined by X-ray diffraction (XRD), transmission electron microscopy (TEM), selected-area electron diffraction (SAED), and X-ray photoelectron spectroscopy (XPS). The transient absorbance difference spectra of the ATRA/TiO2 reveal that, when the size changes from 6 nm to
ISSN:1520-6106
1520-5207
DOI:10.1021/jp037584m