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首页> 外文期刊>Journal of nano research >Sulfonic Acid Functionalized Magnetite Nanoporous-KIT-6 for Removal of Methyl Green from Aqueous Solutions
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Sulfonic Acid Functionalized Magnetite Nanoporous-KIT-6 for Removal of Methyl Green from Aqueous Solutions

机译：磺酸功能化磁铁矿纳米孔KIT-6去除水溶液中的甲基绿

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摘要

The sulfonic acid-functionalized KIT-6 magnetite mesoporous silica nanoparticles (Fesub3/subOsub4/sub@SiOsub2/sub@KIT-6-SOsub3/subH NPs) were prepared as an adsorbent and used for the removal of methyl green from aqueous solutions. Characterization of the obtained adsorbent was done by FT-IR, SEM and EDX instruments. According to the experimental results, about 96.4 % of dye was removed from aqueous solutions at the adsorbent amount of 3.2 g Lsup-1/sup at pH = 3 and ionic strength = 0 during 10 min. The kinetic results indicated that the pseudo-second-order kinetic model was the best model for describing the adsorption kinetic ( = 0.9999). The isotherm analysis demonstrated that the equilibrium data were well fitted to the Freundlich isotherm model, showing a multilayer adsorption of the dye on the adsorbent surface. The maximum adsorption capacity for methyl green was obtained 196 mg gsup-1/sup. Furthermore, the Fesub3/subOsub4/sub@SiOsub2/sub-KIT-6-SOsub3/subH NPs could be simply recovered by external magnet and it exhibited recyclability and reusability for six cycles. The results showed that the Fesub3/subOsub4/sub@SiOsub2/sub-KIT-6-SOsub3/subH NPs are appropriate adsorbent for removal of methyl green from real wastewater samples.
机译：磺酸官能化的KIT-6磁铁矿介孔二氧化硅纳米颗粒（Fe 3 O 4 @SiO 2 @ KIT-6-SO 制备了3 H NPs作为吸附剂，并用于从水溶液中去除甲基绿。通过FT-IR，SEM和EDX仪器对获得的吸附剂进行表征。根据实验结果，在10分钟内，在pH = 3和离子强度= 0的条件下，以3.2 g L -1 的吸附量从水溶液中去除了约96.4％的染料。动力学结果表明，拟二级动力学模型是描述吸附动力学的最佳模型（= 0.999）。等温线分析表明，平衡数据与Freundlich等温线模型完全吻合，显示了染料在吸附剂表面的多层吸附。甲基绿的最大吸附容量为196 mg g -1 。此外，Fe 3 O 4 @SiO 2 -KIT-6-SO 3 H NP可以很简单通过外部磁铁进行回收，并具有六个循环的可回收性和可重复使用性。结果表明，Fe 3 O 4 @SiO 2 -KIT-6-SO 3 H NPs为用于从实际废水样品中去除甲基绿的合适吸附剂。

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