Reflux synthesis and hydrothermal processing of ZrO2 nanopowders at low temperature

被引：62

作者：

Matos, J. M. E. ^{[1
]}

Anjos Junior, F. M. ^{[1
]}

Cavalcante, L. S. ^{[2
]}

Santos, V. ^{[2
]}

Leal, S. H. ^{[3
]}

Santos Junior, L. S. ^{[1
]}

Santos, M. R. M. C. ^{[1
]}

Longo, E. ^{[2
]}

机构：

[1] Univ Fed Piaui, Lab Interdisciplinar Mat Avancados, CCN, DQ, BR-64049550 Teresina, PI, Brazil

[2] Univ Estadual Paulista, IQ, BR-14801907 Araraquara, SP, Brazil

[3] Univ Fed Piaui, DCM, BR-64202020 Parnaiba, PI, Brazil

来源：

MATERIALS CHEMISTRY AND PHYSICS | 2009年 / 117卷 / 2-3期

基金：

巴西圣保罗研究基金会;

关键词：

Oxides; Chemical synthesis; Scherrer method; Crystal structure; PHASE-TRANSFORMATION; OXIDE CATALYSTS; ZIRCONIA; HYDROGENATION; CRYSTALLIZATION; NANOCRYSTALS; ADSORPTION; ALUMINA; SURFACE;

D O I：

10.1016/j.matchemphys.2009.06.024

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this paper, we report on the reflux synthesis at 90 degrees C and hydrothermal processing at 120 degrees C for obtention of zirconium oxide (ZrO2) nanopowders under several conditions. These nanopowders; were characterized by X-ray diffraction (XRD), Fourier transform Raman (FT-Raman) spectroscopy, adsorption-desorption N-2-isotherms, Fourier transform infrared (FT-IR) spectroscopy, thermogravimetric analysis (TGA) and field-emission scanning electron microscopy (FE-SEM). XRD patterns and Raman spectra indicated that ZrO2 nanopowders present a monoclinic structure. In addition, the hydrothermal processing promoted an increase in crystallinity of ZrO2 nanopowders. FT-IR spectra revealed a small shoulder on the nu (Zr-O) bands in transmittance spectra of the ZrO2 nanopowders. The decomposition of precursor was accompanied by evolution of TGA curves. The morphology of ZrO2 nanopowders was observed by FEG-SEM. Also, the FEG-SEM micrographs revealed that the presence of H2O2 in systems reduced the particle size, while the absence of promoted an increase in particle size. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：455 / 459

页数：5

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