NDLI: Magnetic porous carbon microspheres synthesized by simultaneous activation and magnetization for removing methylene blue

Content Provider	Springer Nature Link
Author	Zhang, Huan Chen, Lin Li, Longfei Yang, Yongzhen Liu, Xuguang
Copyright Year	2016
Abstract	Magnetic porous carbon microspheres (MPCMs) based on Fe$_{3}$O$_{4}$-encapsulating carbon composites for removing methylene blue (MB) in aqueous solutions were synthesized by simultaneous activation and magnetization. A series of MPCMs were prepared by combining hydrothermal and annealing treatment with α-Fe$_{2}$O$_{3}$ nanoparticles as iron source, glucose as carbon source and ZnCl$_{2}$ as porogen. The phase structure, specific surface area, porosity, thermostability, magnetic property, as well as morphology of as-prepared MPCMs were verified by X-ray diffraction, Brunauer–Emmeltt–Teller surface area analysis, thermogravimetric analysis, vibrating sample magnetometry, field emission scanning electron microscopy and high resolution transmission electron microscopy. The results indicate that the maximum specific surface area of MPCMs is up to 480.32 m$^{2}$/g when the mass ratio of ZnCl$_{2}$/glucose is 0.25, which is designated as MPCMs-0.25. The saturation magnetism of MPCMs-0.25 is 30.16 emu/g. Adsorption properties of MPCMs were detected by using MPCMs-0.25 as adsorbent to remove MB from aqueous solution. The outcomes suggest that the adsorption reaches equilibrium within 35 min and physical adsorption is involved in the whole adsorption processes. The results of adsorption isotherm reveal that the adsorption process might include monolayer and porous adsorption, meanwhile, various adsorption sites exist on the surfaces of MPCMs-0.25. The reusability and stability of MPCMs-0.25 were also confirmed by five adsorption–desorption cycle experiments.
Starting Page	341
Ending Page	353
Page Count	13
File Format	PDF
ISSN	13802224
Journal	Journal of Porous Materials
Volume Number	24
Issue Number	2
e-ISSN	15734854
Language	English
Publisher	Springer US
Publisher Date	2016-08-25
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Magnetic porous carbon microspheres Simultaneous activation and magnetization Methylene blue Adsorption Catalysis Characterization and Evaluation of Materials Physical Chemistry
Content Type	Text
Resource Type	Article
Subject	Mechanics of Materials Materials Science Mechanical Engineering

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