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Synthesis of covalently bonded graphene oxide-iron magnetic nanoparticles and the kinetics of mercury removal

机译：共价键合石墨烯氧化铁 - 铁磁性纳米粒子的合成及汞去除动力学

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摘要

Synergistically combined nanomaterials have been applied in various fields in materials science to improve the properties of nanocomposites. However, limited studies focus on the ability of such composites for water treatment. A graphene oxide (GO)-iron oxide (Fe3O4) magnetic nano-particle composite (GOMNP) was synthesized and used to study the Hg2+ adsorption kinetics from aqueous solution at various temperatures. GO was attached to magnetic nanoparticles via the amine group of 3-aminopropyltriethoxysilane which was attached the surface of Fe3O4. The GOMNP nano-composite had a Hg2+ adsorption capacity of 16.6 mg g(-1). IR spectra analysis showed that hydroxyl and carboxylate functional groups were mainly responsible for Hg2+ adsorption. Adsorption of Hg2+ by the GOMNP obeyed different adsorption mechanisms at varying adsorption temperatures. The Elovich kinetics model described the Hg2+ adsorption data better than any of the other three models tested. The GOMNP nano-composite is thus a promising nanosorbent for Hg2+ removal from aqueous solutions.
机译：协同组合的纳米材料已应用于材料科学中的各个领域，以改善纳米复合材料的性质。然而，有限的研究重点是这种复合材料用于水处理的能力。合成石墨烯氧化物（GO）-iron氧化物（Fe 3 O 4）磁性纳米颗粒复合物（GOMNP）并用于研究各种温度水溶液的HG2 +吸附动力学。通过胺基的3-氨基丙基三乙氧基硅烷与氧化物基团连接到磁性纳米粒子上，其连接到Fe3O4的表面。 GOMNP纳米复合物的HG2 +吸附容量为16.6mg g（-1）。 IR光谱分析表明，羟基和羧酸酯官能团主要负责HG2 +吸附。 GOMNP对HG2 +的吸附性在不同的吸附温度下进行了不同的吸附机制。 ELOVICH动力学模型描述了HG2 +吸附数据比测试所测试的任何其他三种模型更好。因此，GOMNP纳米复合材料是HG2 +从水溶液中除去的有前途的纳米吸船。

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