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10.3390/ma16020476
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Article

Study on the Preparation and Optical Properties of Graphene Oxide@Fe3O4 Two-Dimensional Magnetically Oriented Nanocomposites

by
Song Yin
1,2,†,
Tiantian Zhang
1,†,
Yinfeng Yu
1,
Xiaotong Bu
1,
Zepeng Zhang
1,*,
Junming Geng
3,*,
Xueling Dong
2 and
Haibing Jiang
4
1
Engineering Research Center of Ministry of Education for Geological Carbon Storage and Low Carbon Utilization of Resources, Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences (Beijing), Xueyuan Road, Haidian District, Beijing 100083, China
2
School of Science, China University of Geosciences, Xueyuan Road, Haidian District, Beijing 100083, China
3
School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 102488, China
4
Lang fang Natural Resources Comprehensive Survey Center, China Geological Survey, Langfang 065000, China
*
Authors to whom correspondence should be addressed.
†
These authors contributed equally to this work.
Materials 2023, 16(2), 476; https://doi.org/10.3390/ma16020476
Submission received: 13 December 2022 / Revised: 29 December 2022 / Accepted: 3 January 2023 / Published: 4 January 2023
(This article belongs to the Special Issue Morphology, Properties and Application of Flake Graphene-Based Composite Materials)
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Abstract

In this work, graphene oxide@Fe3O4 (GO@Fe3O4) two-dimensional magnetically oriented nanocomposites were prepared through the co-precipitation approach using graphene oxide as the carrier and FeCl3·6H2O and FeSO4·7H2O as iron sources. The samples were characterized and tested by X-ray diffraction, a transmission electron microscope, Fourier-transform infrared spectroscopy, a vibrating-specimen magnetometer, a polarized optical microscope, an optical microscope, etc. The effects of material ratios and reaction conditions on the coating effects of Fe3O4 on the GO surface were investigated. The stable GO@Fe3O4 sol system was studied and constructed, and the optical properties of the GO@Fe3O4 sol were revealed. The results demonstrated the GO@Fe3O4 two-dimensional nanocomposites uniformly coated with Fe3O4 nanoparticles were successfully prepared. The GO@Fe3O4 two-dimensional nanocomposites exhibited superparamagnetic properties at room temperature, whose coercive force was 0. The stable GO@Fe3O4 sol system could be obtained by maintaining 1 < pH < 1.5. The GO@Fe3O4 sol showed magneto-orientation properties, liquid crystalline properties, and photonic crystal properties under the influence of the external magnetic field. The strength and direction of the magnetic field and the solid content of the GO@ Fe3O4 sol could regulate the aforementioned properties. The results suggest that GO@Fe3O4 two-dimensional magnetically oriented nanocomposites have potential applications in photonic switches, gas barriers, and display devices.
Keywords: graphene oxide; magnetic orientation; liquid crystal; magneto-optical materials graphene oxide; magnetic orientation; liquid crystal; magneto-optical materials
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MDPI and ACS Style

Yin, S.; Zhang, T.; Yu, Y.; Bu, X.; Zhang, Z.; Geng, J.; Dong, X.; Jiang, H. Study on the Preparation and Optical Properties of Graphene Oxide@Fe3O4 Two-Dimensional Magnetically Oriented Nanocomposites. Materials 2023, 16, 476. https://doi.org/10.3390/ma16020476

AMA Style

Yin S, Zhang T, Yu Y, Bu X, Zhang Z, Geng J, Dong X, Jiang H. Study on the Preparation and Optical Properties of Graphene Oxide@Fe3O4 Two-Dimensional Magnetically Oriented Nanocomposites. Materials. 2023; 16(2):476. https://doi.org/10.3390/ma16020476

Chicago/Turabian Style

Yin, Song, Tiantian Zhang, Yinfeng Yu, Xiaotong Bu, Zepeng Zhang, Junming Geng, Xueling Dong, and Haibing Jiang. 2023. "Study on the Preparation and Optical Properties of Graphene Oxide@Fe3O4 Two-Dimensional Magnetically Oriented Nanocomposites" Materials 16, no. 2: 476. https://doi.org/10.3390/ma16020476

APA Style

Yin, S., Zhang, T., Yu, Y., Bu, X., Zhang, Z., Geng, J., Dong, X., & Jiang, H. (2023). Study on the Preparation and Optical Properties of Graphene Oxide@Fe3O4 Two-Dimensional Magnetically Oriented Nanocomposites. Materials, 16(2), 476. https://doi.org/10.3390/ma16020476

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