Magnetic and high rate adsorption properties of porous Mn_1−xZn_xFe₂O₄ (0  x  0.8) adsorbents

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• 作者：Xiangyu Hou ; Jing Feng ; Xiaohan Liu ; Yueming Ren ; Zhuangjun Fan ; Milin Zhang
• 关键词：Ferrite ; Porous ; Zn²⁺ substitution ; Magnetism ; Adsorption
• 刊名：Journal of Colloid and Interface Science
• 出版年：2011
• 出版时间：15 January 2011
• 年：2011
• 卷：353
• 期：2
• 页码：524-529
• 全文大小：835 K

文摘

Porous spinel ferrites Mn_1−xZn_xFe₂O₄ (0  x  0.8) are synthesized by a simple sol–gel method with egg white. All samples exhibit porous morphologies and large BET surface area (S_BET). The substitution of Zn²⁺ affects the magnetic properties of ferrites and the adsorption properties of methylene blue (MB) on ferrites, obviously. The saturation magnetization (Ms) of Mn_1−xZn_xFe₂O₄ increases before x = 0.4, and decreases with further increase of Zn²⁺ substitution. This can be ascribed to the changes of the cationic distribution and the variation of spin arrangement in A-site and B-site of spinel structure. All samples show high adsorption capacity and the removal efficiencies of MB reach up to >90 % within 3 h. The Zn²⁺ substitution accelerates the adsorption rate and capacity of MB on Mn_1−xZn_xFe₂O₄. The quickest adsorption occurred at x = 0.2 and the largest adsorption capacity occurred at x = 0.8.