Electronic Structure and Size of TiO2 Nanoparticles of Controlled Size Prepared by Aerosol Methods

被引：0

作者：

Leonardo Soriano

Petri P. Ahonen

Esko I. Kauppinen

Jorge Gómez-García

Carmen Morant

Francisco J. Palomares

Marta Sánchez-Agudo

Patrick R. Bressler

José M. Sanz

机构：

[1] Departamento de Física Aplicada,

[2] Instituto de Materiales Nicolás Cabrera,undefined

[3] Universidad Autónoma de Madrid,undefined

[4] E-28049 Madrid,undefined

[5] Spain,undefined

[6] VTT Chemical Technology,undefined

[7] SF-02044 Espoo,undefined

[8] Finland,undefined

[9] Instituto de Ciencia de Materiales de Madrid,undefined

[10] CSIC,undefined

[11] E-28049 Madrid,undefined

[12] Spain,undefined

[13] BESSY,undefined

[14] D-12489 Berlin-Adlershof,undefined

[15] Germany,undefined

来源：

Monatshefte für Chemie / Chemical Monthly | 2002年 / 133卷

关键词：

Keywords. Electronic structure; Nanostructures; Spectroscopy.;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

A complete characterization of nanostructures has to deal both with electronic structure and dimensions. Here we present the characterization of TiO2 nanoparticles of controlled size prepared by aerosol methods. The electronic structure of these nanoparticles was probed by X-ray absorption spectroscopy (XAS), the particle size by atomic force microscopy (AFM). XAS spectra show that the particles crystallize in the anatase phase upon heating at 500°C, whereas further annealing at 700°C give crystallites of 70% anatase and 30% rutile phases. Raising the temperature to 900°C results in a complete transformation of the particles to rutile. AFM images reveal that the mean size of the anatase particles formed upon heating at 500°C is 30 nm, whereas for the rutile particles formed upon annealing at 900°C 90 nm were found. The results obtained by these techniques agree with XRD data.

引用

页码：849 / 857

页数：8