材料科学
碳化
扫描电子显微镜
化学工程
饱和(图论)
碳纳米纤维
碘
细菌纤维素
纳米颗粒
介孔材料
磁性纳米粒子
无定形固体
纤维素
纳米技术
复合材料
冶金
化学
有机化学
碳纳米管
催化作用
工程类
组合数学
数学
作者
Koyo Nakamura,Nao Suzuki,Tsugiko Takase
标识
DOI:10.1016/j.diamond.2022.108938
摘要
Magnetic carbon nanofibers (CNFs) carbonized at different temperatures were prepared from bacterial cellulose (BC) alloyed with magnetic fluid (MF) or Fe3O4 powder to facilitate the efficient use of biomass resources. The CNFs alloyed with magnetic nanoparticles demonstrated high saturation magnetizations and coercivities up to a carbonization temperature of 800 °C. Iodine-treated BC alloyed with magnetic nanoparticles showed a substantial increase in the char yields with lower saturation magnetizations compared to the iodine-untreated BC. The analysis of X-ray diffraction results implies that the magnetic properties are related to the types and relative amounts of iron and iron-containing compounds, and the existence of amorphous magnetic nanoparticles in the CNFs. Scanning electron microscopy results indicated that the surfaces of the MF-alloyed CNFs possessed a fused fibrous texture with voids, and the magnetic CNFs without iodine treatment featured crystalline nanoparticles. The MF-alloyed CNFs with iodine treatment demonstrated the maximum surface area and pore volume, while the MF-alloyed CNFs without iodine treatment mainly contained mesopores.
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