磁性NiFe<sub>2</sub>O<sub>4</sub>纳米颗粒/榛子壳基活性炭复合材料的制备

Milad Jamal Livani; Mohsen Ghorbani; Hassan Mehdipour

doi:10.1016/S1872-5805(18)60358-0

磁性NiFe₂O₄纳米颗粒/榛子壳基活性炭复合材料的制备

doi: 10.1016/S1872-5805(18)60358-0

1.
M. Sc Student of Chemical Engineering, Babol Noshirvani University of Technology, Shariati Ave., Babol, 47148-71167, Iran;
2.
Department of Chemical Engineering, Babol Noshirvani University of Technology, Shariati Ave., Babol, 47148-71167, Iran

详细信息

通讯作者:
Mohsen Ghorbani.E-mail:M.Ghorbani@nit.ac.ir

中图分类号: TB333
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- 文章访问数: 334
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- 被引次数: 0
出版历程
- 收稿日期: 2018-08-02
- 录用日期: 2018-12-27
- 修回日期: 2018-11-02
- 刊出日期: 2018-12-28

Preparation of an activated carbon from hazelnut shells and its composites with magnetic NiFe₂O₄ nanoparticles

1.
M. Sc Student of Chemical Engineering, Babol Noshirvani University of Technology, Shariati Ave., Babol, 47148-71167, Iran;
2.
Department of Chemical Engineering, Babol Noshirvani University of Technology, Shariati Ave., Babol, 47148-71167, Iran

摘要

摘要: 以榛子壳为原料，NaOH为化学活化剂，在600℃下，氮气气氛中活化制备出低成本的活性炭，然后分别采用水热法和共沉淀法制备磁性NiFe₂O₄纳米颗粒，再将NiFe₂O₄纳米颗粒与活性炭进行水热复合，得到NiFe₂O₄/活性炭复合材料。采用FESEM、TEM、XRD、FT-IR、氮吸附及磁性测试等手段对样品进行表征。结果表明，与共沉淀法相比，由水热法所制NiFe₂O₄纳米颗粒具有更高的饱和磁化强度和更小的平均颗粒尺寸。通过水热法复合磁性NiFe₂O₄纳米颗粒后，活性炭的比表面积和总孔容分别从314降至288 m²/g，0.363 9降至0.333 8 cm³/g。NiFe₂O₄纳米颗粒与活性炭复合后，其主要分布在活性炭表面，少部分位于内孔中，同时颗粒尺寸无变化。因存在活性炭，复合材料的饱和磁化强度低于纯NiFe₂O₄。复合材料在室温下展现出超顺磁行为。NiFe₂O₄纳米颗粒可通过外加磁场从溶液中分离。
- 纳米颗粒 /
- 活性炭 /
- 共沉淀 /
- 水热 /
- 纳米复合材料 /
- 磁性能
Abstract: A low cost activated carbon was prepared from hazelnut shells by chemical activation with sodium hydroxide at 600℃ in a N₂ atmosphere and then combined with magnetic NiFe₂O₄ nanoparticles by hydrothermal and co-precipitation methods. Samples were characterized by FESEM, TEM, XRD, FT-IR, nitrogen adsorption and magnetic measurements. Results indicated that the NiFe₂O₄ nanoparticles synthesized by the hydrothermal method had a higher saturation magnetization and smaller average particle size than those produced by the co-precipitation method. The specific surface area and total pore volume of the activated carbon decreased from 314 to 288 m²/g and 0.363 9 to 0.333 8 cm³/g, respectively by forming a hybrid with the magnetic NiFe₂O₄ nanoparticles synthesized by the hydrothermal method. NiFe₂O₄ nanoparticles were mainly distributed on the surface, although a few were inside the pores of the activated carbon. Their sizes were the same as those of the original ones. The saturation magnetization of the hybrids was lower than those of the original NiFe₂O₄ nanoparticles due to the existence of the activated carbon. They showed superparamagnetic behavior at room temperature and were easily separated from solutions by an external magnet.
- Nanoparticle /
- Activated carbon /
- Co-precipitation /
- Hydrothermal /
- Nanocomposite /
- Magnetic properties

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