共 36 条
Fabrication of α-Fe2O3-γ-Al2O3 core-shell nanofibers and their Cr(VI) adsorptive properties
被引:29
作者:

Li, Xiang
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Jilin Univ, Alan G MacDiarmid Inst, Changchun 130012, Peoples R China Jilin Univ, Alan G MacDiarmid Inst, Changchun 130012, Peoples R China

Zhao, Rui
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Jilin Univ, Alan G MacDiarmid Inst, Changchun 130012, Peoples R China Jilin Univ, Alan G MacDiarmid Inst, Changchun 130012, Peoples R China

Sun, Bolun
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机构:
Jilin Univ, Alan G MacDiarmid Inst, Changchun 130012, Peoples R China Jilin Univ, Alan G MacDiarmid Inst, Changchun 130012, Peoples R China

Lu, Xiaofeng
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机构:
Jilin Univ, Alan G MacDiarmid Inst, Changchun 130012, Peoples R China Jilin Univ, Alan G MacDiarmid Inst, Changchun 130012, Peoples R China

Zhang, Chengcheng
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机构:
Jilin Univ, Alan G MacDiarmid Inst, Changchun 130012, Peoples R China Jilin Univ, Alan G MacDiarmid Inst, Changchun 130012, Peoples R China

Wang, Zhaojie
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机构:
Jilin Univ, Alan G MacDiarmid Inst, Changchun 130012, Peoples R China Jilin Univ, Alan G MacDiarmid Inst, Changchun 130012, Peoples R China

Wang, Ce
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h-index: 0
机构:
Jilin Univ, Alan G MacDiarmid Inst, Changchun 130012, Peoples R China Jilin Univ, Alan G MacDiarmid Inst, Changchun 130012, Peoples R China
机构:
[1] Jilin Univ, Alan G MacDiarmid Inst, Changchun 130012, Peoples R China
来源:
基金:
中国国家自然科学基金;
高等学校博士学科点专项科研基金;
关键词:
HEAVY-METAL IONS;
ALPHA-FE2O3;
NANOSTRUCTURES;
AQUEOUS SYSTEMS;
PHOSPHATE IONS;
IRON-OXIDES;
REMOVAL;
NANOCRYSTALS;
GAMMA-AL2O3;
ADSORBENT;
ALUMINA;
D O I:
10.1039/c4ra03692a
中图分类号:
O6 [化学];
学科分类号:
0703 ;
摘要:
alpha-Fe2O3-gamma-Al2O3 core-shell nanofibers have been synthesized via an electrospinning process combined with vapor deposition and heat treatment techniques. The composite nanofibers exhibited ferromagnetic properties and Cr(VI) removal performance. The Freundlich adsorption isotherm was applied to describe the adsorption process. Kinetics of the Cr(VI) ion adsorption were found to follow a pseudo-secondorder rate equation. The obtained alpha-Fe2O3-gamma-Al2O3 core-shell nanofibers were carefully examined by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR) and vibrating sample magnetometry (VSM). The adsorption mechanism for Cr(VI) onto alpha-Fe2O3-gamma-Al2O3 core-shell nanofibers was elucidated by X-ray photoelectron spectroscopy (XPS). The results suggested that the electrostatic adsorption between the positively charged surface of alpha-Fe2O3-gamma-Al2O3 nanofibers and Cr(VI) species, and the electron-hole pair provided by Fe2O3 induced the Cr(VI) reduction to Cr(III). It is anticipated that the alpha-Fe2O3-gamma-Al2O3 core-shell nanofibers are an attractive adsorbent for the removal of heavy metal ions from water.
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页码:42376 / 42382
页数:7
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