Influence of Al substitution on magnetism and adsorption properties of hematite

被引：15

作者：

Cao, Shanshan ^{[1
]}

Kang, Feifei ^{[1
]}

Yang, Xin ^{[1
]}

Zhen, Zhen ^{[1
]}

Liu, Hui ^{[1
,2
]}

Chen, Rufen ^{[1
,2
]}

Wei, Yu ^{[1
,2
]}

机构：

[1] Hebei Normal Univ, Coll Chem & Mat Sci, Shijiazhuang 050024, Peoples R China

[2] Key Lab Inorgan Nanomat Hebei Prov, Shijiazhuang 050024, Peoples R China

来源：

JOURNAL OF SOLID STATE CHEMISTRY | 2015年 / 228卷

基金：

中国国家自然科学基金;

关键词：

Al substituted hematite; Magnetism; Adsorption performance; IRON-OXIDES; AQUEOUS-SOLUTION; METAL-IONS; FE; SORPTION; REMOVAL; SYSTEM; GOETHITES; PARTICLES; EVOLUTION;

D O I：

10.1016/j.jssc.2015.04.034

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

A series of Al-substituted hematite was prepared. The structures and properties of as-prepared samples were characterized by various techniques. The magnetic property of the samples was determined and the adsorption of three dyes Acid Blue 74, Methylene Blue and Phenol Red onto the samples was investigated. The results showed that Al incorporation into the crystal structure of hematite occurs via isomorphous ionic substitution of Al for Fe. With increasing Al content, the particle size of samples decreases, the magnetization increases and the remanent magnetization remains unchanged. The coercivity of the samples increases with Al substitution up to n(Al)/n(Fe) 0.03, and then decreases as Al content further increases. Compared with Al-free hematite, Al-substituted samples exhibit better adsorption ability to all of the three dyes. The adsorption rates of the three dyes on the surface of Al substituted samples depend on the structure of dye, pH and Al content in hematite. (C) 2015 Elsevier Inc. All rights reserved.

引用

页码：82 / 89

页数：8

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