Synthesis and adsorption properties of mesoporous MgAl2O4 spinel fibers by coaxial electrospinning

Wen-Ling JI; Heng-Yong WEI; Hui LI; Yi CUI; Shi-Lei HU; Pan LIU; Jing-Long BU; Jin-Meng YANG; Ran WANG

doi:10.2109/jcersj2.17123

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Synthesis and adsorption properties of mesoporous MgAl₂O₄ spinel fibers by coaxial electrospinning

Wen-Ling JI, Heng-Yong WEI, Hui LI, Yi CUI, Shi-Lei HU, Pan LIU, Jing-Long BU, Jin-Meng YANG, Ran WANG

Author information

Wen-Ling JI
College of Materials Science and Engineering, Hebei Provincial Key Laboratory of Inorganic Nonmetallic Materials, North China University of Science and Technology
Heng-Yong WEI
College of Materials Science and Engineering, Hebei Provincial Key Laboratory of Inorganic Nonmetallic Materials, North China University of Science and Technology
Hui LI
College of Materials Science and Engineering, Hebei Provincial Key Laboratory of Inorganic Nonmetallic Materials, North China University of Science and Technology
Yi CUI
College of Materials Science and Engineering, Hebei Provincial Key Laboratory of Inorganic Nonmetallic Materials, North China University of Science and Technology
Shi-Lei HU
College of Materials Science and Engineering, Hebei Provincial Key Laboratory of Inorganic Nonmetallic Materials, North China University of Science and Technology
Pan LIU
College of Materials Science and Engineering, Hebei Provincial Key Laboratory of Inorganic Nonmetallic Materials, North China University of Science and Technology
Jing-Long BU
College of Materials Science and Engineering, Hebei Provincial Key Laboratory of Inorganic Nonmetallic Materials, North China University of Science and Technology
Jin-Meng YANG
College of Materials Science and Engineering, Hebei Provincial Key Laboratory of Inorganic Nonmetallic Materials, North China University of Science and Technology
Ran WANG
College of Materials Science and Engineering, Hebei Provincial Key Laboratory of Inorganic Nonmetallic Materials, North China University of Science and Technology

Keywords: MgAl₂O₄ fibers, Mesoporous, Electrospinning, Adsorption

JOURNAL FREE ACCESS

2018 Volume 126 Issue 2 Pages 128-134

DOI https://doi.org/10.2109/jcersj2.17123

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Abstract

Mesoporous magnesium aluminate (MgAl₂O₄) spinel fibers were prepared using a coaxial electrospinning technique. The phase composition, porous structure and adsorption performance of the mesoporous MgAl₂O₄ spinel fibers were investigated. Differential thermal/thermo-gravimetric and X-ray-diffraction analysis revealed that gel fibers began to crystallize into the MgAl₂O₄ spinel phase at 700°C and became fully crystallized at 900°C. The morphology changes in the fibers were tracked by use of a scanning electron microscope and transmission electron microscope, which showed fibers with a mesoporous structure formed at 900°C. The Brunner-Emmet-Teller specific surface area of MgAl₂O₄ spinel fibers is 36.95 m²/g. In addition, the dye adsorption capacity of the fibers shows an adsorption percentage of over 80.0% in 20 mg/l methylene blue after 2 min of adsorption. The kinetic study demonstrated that the adsorption data fit the pseudo-second-order kinetic model more naturally.

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