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首页> 外文期刊>Separation and Purification Technology >Design of composite maghemite/hematite/carbon aerogel nanostructures with high performance for organic dye removal
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Design of composite maghemite/hematite/carbon aerogel nanostructures with high performance for organic dye removal

机译：具有高性能去除有机染料的磁赤铁矿/赤铁矿/碳气凝胶复合纳米结构的设计

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Composite Fe3O4/alpha-Fe2O3 nanorods (180N) with a specific surface area of 16.2 m(2)/g were successfully synthesized via a facile hydrothermal reaction at 180 degrees C. To increase the specific surface area, a mesoporous carbon aerogel (CA) with a large specific surface area was added to the hydrothermal reaction to form mesoporous Fe3O4/alpha-Fe2O3/CA structures (CA-180) with a specific surface area of 267.7 m(2)/g instead of nanorods. The as-prepared 180N and CA-180 samples were further annealed at 400 degrees C to oxidize the Fe3O4 phase, resulting in the formation of composite gamma-Fe2O3/alpha-Fe2O3 nanorods (400N) with a specific surface area of 27.7 m(2)/g and mesoporous gamma-Fe2O3/alpha-Fe2O3/CA structures (CA-400) with a specific surface area of 551 m(2)/g. The CA-400 samples were further used to remove the dye Rhodamine B (RhB) from aqueous solution, and 98.2% of the RhB dye was removed using the CA-400 sample when the initial RhB concentration was 8 ppm. The as-prepared CA-400 sample exhibits strong potential for use in wastewater treatment applications, such as organic dye removal. (C) 2015 Elsevier B.V. All rights reserved.
机译：通过在180摄氏度的水热反应成功合成了比表面积为16.2 m（2）/ g的复合Fe3O4 / alpha-Fe2O3纳米棒（180N）。为增加比表面积，需使用介孔碳气凝胶（CA）具有较大比表面积的水被添加到水热反应中以形成比表面积为267.7 m（2）/ g的中孔Fe3O4 / alpha-Fe2O3 / CA结构（CA-180）而不是纳米棒。将准备好的180N和CA-180样品在400摄氏度下进一步退火以氧化Fe3O4相，从而形成比表面积为27.7 m（2）的复合γ-Fe2O3/α-Fe2O3纳米棒（400N）。 / g和介孔的γ-Fe2O3/ alpha-Fe2O3 / CA结构（CA-400），比表面积为551 m（2）/ g。将CA-400样品进一步用于从水溶液中去除染料若丹明B（RhB），并且当初始RhB浓度为8 ppm时，使用CA-400样品去除了98.2％的RhB染料。所制备的CA-400样品具有用于废水处理应用（如去除有机染料）的强大潜力。 （C）2015 Elsevier B.V.保留所有权利。

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