Synthesis and structural properties of ultra-small oxide (TiO2, ZrO2, SnO2) nanoparticles prepared by decomposition of metal alkoxides

被引：14

作者：

Epifani, Mauro ^{[1
]}

Arbiol, Jordi ^{[2
,3
]}

Pellicer, Eva ^{[4
]}

Sergent, Nicolas ^{[5
]}

Pagnier, Thierry ^{[5
]}

Morante, Joan R. ^{[4
,6
]}

机构：

[1] CNR, IMM, I-73100 Lecce, Italy

[2] CSIC, ICREA, Bellaterra 08193, Cat, Spain

[3] CSIC, Inst Ciencia Mat Barcelona, Bellaterra 08193, Cat, Spain

[4] Univ Barcelona, Dept Elect, M2E XaRMAE, E-08028 Barcelona, Cat, Spain

[5] GIT CNRS UJF, Lab Electrochim & Physicochim Mat & Interfaces, F-38402 St Martin Dheres, France

[6] IREC, Barcelona 08019, Spain

来源：

MATERIALS CHEMISTRY AND PHYSICS | 2010年 / 124卷 / 01期

关键词：

Nanocrystals; SnO2; polymorphs; Transmission electron microscopy; Raman spectroscopy; X-RAY-DIFFRACTION; PHASE-TRANSITIONS; COORDINATING ENVIRONMENT; NANOCRYSTALLINE SNO2; SENSING PROPERTIES; SIZE DEPENDENCE; RAMAN-SPECTRA; TRANSFORMATION; NANOWIRES; STABILITY;

D O I：

10.1016/j.matchemphys.2010.07.066

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The decomposition of metal (Ti, Zr, Sn) alkoxides at 250 degrees C in a solution of tetradecene and dodecylamine resulted in the formation of ultra-small (1-2 nm) oxide nanoparticles. The nanoparticles showed unusual structural properties. The high-pressure orthorhombic phase was found for SnO2. The as-synthesized ZrO2 nanoparticles were only partially crystallized. It was possible to observe their in situ crystallization under the TEM beam. The TiO2 nanoparticles appeared amorphous, with only a few nanocrystals dispersed in the sample. The temperature evolution of the samples was investigated in situ by Raman spectroscopy. All SnO2 was converted to stable cassiterite at 350 degrees C. TiO2 and ZrO2 samples displayed phase stability reversal over a broad range of temperatures. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：809 / 815

页数：7

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