Template free fabrication of hollow hematite spheres via a one-pot polyoxometalate-assisted hydrolysis process

被引：45

作者：

Mao, Baodong

Kang, Zhenhui

Wang, Enbo ^{[1
]}

Tian, Chungui

Zhang, Zhiming

Wang, Chunlei

Song, Yanli

Li, Meiye

机构：

[1] NE Normal Univ, Dept Chem, Inst Polyoxometalate Chem, Changchun 130024, Jilin, Peoples R China

[2] Chinese Acad Sci, Changchun Inst Appl Chem, Changchun 130022, Peoples R China

来源：

JOURNAL OF SOLID STATE CHEMISTRY | 2007年 / 180卷 / 02期

基金：

中国国家自然科学基金;

关键词：

hematite; hollow spheres; one-pot synthesis; nitrogen adsorption-desorption;

D O I：

10.1016/j.jssc.2006.11.005

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Uniform hollow hematite (alpha-Fe2O3) spheres with diameter of about 600-700 nm and shell thickness lower than 100 nm are obtained by direct hydrothermal treatment of dilute FeCl3 and tungstophosphoric acid H3PW12O40 solution at 180 degrees C. The hollow spheres are composed of robust shells with small nanoparticles standing out of the surface and present a high-surface area and a weak ferromagnetic behavior at room temperature. The effect of concentration of H3PW12O40, reaction time and temperature for the formation of the hollow spheres are investigated in series of experiments. The formation of the hollow spheres may be ascribed to a polyoxometalte-assisted forced hydrolysis and dissolution process. (c) 2006 Elsevier Inc. All rights reserved.

引用

页码：489 / 495

页数：7

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