TiO2 nanocrystal particles and electrodes. The combined role of pH and metal substrate

被引：8

作者：

Ardizzone, S. ^{[1
]}

Cappelletti, G. ^{[1
]}

Minguzzi, A. ^{[1
]}

Rondinini, S. ^{[1
]}

Vertova, A. ^{[1
]}

机构：

[1] Univ Milan, Dept Phys Chem & Electrochem, I-20133 Milan, Italy

来源：

JOURNAL OF ELECTROANALYTICAL CHEMISTRY | 2008年 / 621卷 / 02期

关键词：

TiO2; nanocrystals; layers; Trap sites; Electrochemical impedance spectroscopy; Cyclic voltammetry;

D O I：

10.1016/j.jelechem.2007.09.022

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

this work titania nanoparticles and layers, deposited onto metal supports (Ti and Au), have been prepared by combining a sol-gel precipitation with hydrothermal growth steps. This composite route implying also it final calcination at 300 C yields nanocrystalline anatase which shows the presence of electron trap sites localized within the band gap. The powders and layers are characterized for phase composition, crystallinity (XRD) and morphology (SEM). The role played by metal substrate and pH on the features of the electrodes were investigated by CV and impedance measurements. (c) 2007 Elsevier B.V. All rights reserved.

引用

页码：185 / 197

页数：13

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