Selective fabrication of iron oxide particles in halloysite lumen

被引：31

作者：

Zheng, Pengwu ^{[1
]}

Du, Yuanyuan ^{[1
]}

Ma, Xiaofei ^{[2
]}

机构：

[1] Jiangxi Sci & Technol Normal Univ, Sch Pharm, Nanchang 330013, Jiangxi, Peoples R China

[2] Tianjin Univ, Sch Sci, Dept Chem, Tianjin 300072, Peoples R China

来源：

MATERIALS CHEMISTRY AND PHYSICS | 2015年 / 151卷

关键词：

Oxides; Magnetic materials; Electron microscopy; Surface properties; NATURAL HALLOYSITE; CONTROLLED-RELEASE; AQUEOUS-SOLUTION; METHYLENE-BLUE; CLAY NANOTUBES; ADSORPTION;

D O I：

10.1016/j.matchemphys.2014.11.075

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

As the adsorbents or the supports of photocatalysts, halloysite nanotubes (HNT) were expected to have intact external surface for adsorption or catalyst immobilization, when Fe3O4 particles was introduced to prepare magnetic HNTs for easy separation. The negatively charged urease was loaded inside positively charged HNT lumen, and urease catalyzed the hydrolysis of urea and resulted in the alkaline environment in HNT lumen. When Fe3+ and Fe2+ diffused in, Fe3O4 particles were selectively synthesized in the lumen of HNT. The obtained Fe3O4@HNT is characterized by transmission electron microscopy and Fourier transform infrared spectroscopy, X-ray diffraction and hysteresis loops. The obtained magnetic Fe3O4@HNT can be magnetically collected with intact external surface, which can support photocatalysts or remove the pollutants. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：14 / 17

页数：4

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