标題：Synthesis of porous superparamagnetic iron oxides from colloidal nanoparticles: Effect of calcination temperature and atmosphere作者：Cheng, Wei; Xu, Jing; Ding, Wei; Wang, Yajie; Zheng, Wenping; Wu, Feng;Li, Jinjun

來源出版物：MATERIALS CHEMISTRY AND PHYSICS 卷：153頁：187-194 DOI：10.1016/j.matchemphys.2015.01.002 出版年：MAR 1 2015

摘要：Nanostructured iron oxides with superparamagnetism were synthesized from colloidal particles of hydrous iron oxide. The synthesis procedure involved preparation of acetone-nanoparticle composite and calcination of the composite in air or nitrogen. The effects of calcination temperature and atmosphere on the properties of the products were investigated. Powder X-ray diffraction, Fe-57 Mossbauer spectra, transmission electron microscopy, nitrogen sorption, thermal analysis and vibrating-sample magnetometry were applied to characterize the materials. The products calcined in flowing air are composed of nanoparticles, while those calcined in flowing nitrogen contain nanosheets. The former has larger specific surface areas, whereas the latter has stronger saturation magnetization in external magnetic field. Increasing calcination temperature reduced the specific surface area of the product, whereas enhanced its saturation magnetization. Furthermore, the iron oxides with superparamagnetism showed good affinity to arsenite, and therefore they could be potential adsorbents for arsenic remediation in water.

入藏号：WOS:000349505700024

文獻類型：Article

語種：English

作者關鍵詞：Magnetic materials, Nanostructures, Chemical synthesis, Adsorption

擴展關鍵詞：MAGNETIC-PROPERTIES; GAMMA-FE2O3 NANOPARTICLES; BIOMEDICAL APPLICATIONS; FE3O4 NANOPARTICLES; ARSENIC REMOVAL; FE2O3 NANOPARTICLES; SURFACE-AREA; WATER; ADSORPTION; CARBON

通訊作者地址：Li, Jinjun; Wuhan Univ, Hubei Key Lab Bioresources & Environm Biotechnol, Sch Resources & Environm Sci, Wuhan 430079, Peoples R China.

電子郵件地址：ljjcbacademy@163.com

地址：

[Cheng, Wei; Xu, Jing; Ding, Wei; Wang, Yajie; Zheng, Wenping; Wu, Feng; Li, Jinjun] Wuhan Univ, Hubei Key Lab Bioresources & Environm Biotechnol, Sch Resources & Environm Sci, Wuhan 430079, Peoples R China.

研究方向：Materials Science

ISSN：0254-0584

eISSN:1879-3312