Self-assembled double-shelled ferrihydrite hollow spheres with a tunable aperture

被引：66

作者：

Wu, Zhengcui ^{[1
,2
]}

Zhang, Miao ^{[1
]}

Yu, Kuai ^{[1
]}

Zhang, Shudong ^{[1
]}

Xie, Yi ^{[1
]}

机构：

[1] Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Dept Nanomat & Nanochem, Hefei 230026, Anhui, Peoples R China

[2] Anhui Normal Univ, Coll Chem & Mat Sci, Anhui Key Lab Funct Mol Solids, Wuhu 241000, Peoples R China

来源：

CHEMISTRY-A EUROPEAN JOURNAL | 2008年 / 14卷 / 17期

关键词：

iron; mesoporous materials; self-assembly; sensors synthesis design;

D O I：

10.1002/chem.200701945

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Novel double-shelled hierarchical ferrihydrite hollow spheres (Fe10O14(OH)(2)center dot 4H(2)O) were successfully synthesized on a large scale by using a facile medicine-inspired solution-phase approach. Sodium nitroprusside (SNP), an ordinary and inexpensive medicine for expanding blood vessels, served as both a ferric source and an in situ formed gas-bubble template with the presence of sodium dihydrogen phosphate as a pH regulator, coordinator, and stabilizer. A twice-gas-bubble template model has been proposed for the formation of the double-shelled hollow spheres to take advantage of the dissociation and hydrolyzation of the two kinds of ligands in the SNP precursor. The size of the double-shelled ferrihydrite hollow spheres can be tuned by varying the experimental parameters. As-obtained ferrihydrite is highly sensitive to ethanol gas, which indicates potential applications in the field of sensing devices.

引用

页码：5346 / 5352

页数：7

共 53 条

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Barron V, 1997, AM MINERAL, V82, P1091

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