Formation of spherical SnO2 particles consisting of nanocrystals from aqueous solution of SnCl4 containing citric acid via hydrothermal process

被引：23

作者：

Uchiyama, Hiroaki ^{[1
]}

Shirai, Yuya ^{[2
]}

Kozuka, Hiromitsu ^{[1
]}

机构：

[1] Kansai Univ, Fac Chem Mat & Bioengn, Suita, Osaka 5648680, Japan

[2] Kansai Univ, Grad Sch Engn, Suita, Osaka 5648680, Japan

来源：

JOURNAL OF CRYSTAL GROWTH | 2011年 / 319卷 / 01期

关键词：

Crystal morphology; Growth models; Hydrothermal crystal growth; Oxides; TIN OXIDE; CALCITE CRYSTALS; LOW-TEMPERATURE; NANOPARTICLES; CRYSTALLIZATION; SUPERSTRUCTURES; NANOCOMPOSITE; MESOCRYSTALS; ORGANIZATION; BIOMINERALS;

D O I：

10.1016/j.jcrysgro.2011.02.002

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

We prepared crystalline SnO2 particles from aqueous solutions of SnCl4 with and without citric acid via hydrothermal treatment. The crystallinity, the crystallite size and shape, and the morphology of the secondary particles depend on the concentration of citric acid, the pH value of the solvents and the hydrothermal treatment temperature. Spherical SnO2 particles of 1-3 mu m in diameter consisting of nanocrystallites below 10 nm in size were obtained via hydrothermal treatment at 150 degrees C from a solution with the citric acid/SnCl4 mole ratio of 0.5 in acidic solvents of pH 3.0-5.5. The SnO2 spheres were thought to be formed through the moderate nucleation rate provided by the relatively high solubility of Sn4+ species and coordination by citric acid. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：70 / 78

页数：9

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