Novel SrTi1-xFexO3 nanocubes synthesized by microwave-assisted hydrothermal method

被引：20

作者：

da Silva, Luis F. ^{[1
]}

Avansi, Waldir, Jr. ^{[2
]}

Moreira, Mario L. ^{[2
]}

Andres, Juan ^{[3
]}

Longo, Elson ^{[2
]}

Mastelaro, Valmor R. ^{[1
]}

机构：

[1] Univ Sao Paulo, Inst Fis Sao Carlos, BR-13566590 Sao Carlos, SP, Brazil

[2] Univ Estadual Paulista, LIEC, Inst Quim, BR-14800900 Araraquara, SP, Brazil

[3] Univ Jaume 1, Dept Quim Fis & Analyt, E-12080 Castellon de La Plana, Spain

来源：

CRYSTENGCOMM | 2012年 / 14卷 / 11期

关键词：

DECAOCTAHEDRON SHAPE; CRYSTAL-GROWTH; MESOCRYSTALS; SENSORS; FE; NANOPARTICLES; NANOCRYSTALS; TRANSITION; CHEMISTRY; SRTIO3;

D O I：

10.1039/c2ce25229e

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We report herein for the first time a facile synthesis method to obtain SrTi1-xFexO3 nanocubes by means by a microwave-assisted hydrothermal (MAH) method at 140 degrees C. The effect of iron addition on the structural and morphological properties of SrTiO3 was investigated. X-ray diffraction measurements show that all STFO samples present a cubic perovskite structure. X-ray absorption spectroscopy at Fe absorption K-edge measurements revealed that iron ions are in a mixed Fe2+/Fe3+ oxidation state and preferentially occupy the Ti4+-site. UV-visible spectra reveal a reduction in the optical gap (E-gap) of STFO samples as the amount of iron is increased. An analysis of the data obtained by field emission scanning electron microscopy points out that the nanoparticles present a cubic morphology independently of iron content. According to high-resolution transmission electron microscopy results, these nanocubes are formed by a self-assembly process of small primary nanocrystals.

引用

页码：4068 / 4073

页数：6

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