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Preparation, Characterization, and Applications of Electrospun Carbon Nanofibers and Its... DOI: http://dx.doi.org/10.5772/intechopen.88317 Figure 7. TEM images of Pd-NP/CENFs. (A) Lower magnification; (B) higher magnification [45]. Figure 8. TEM images of sample (A) CNFs and (B) CNFs/AgNPs, (C) HRTEM images of CNFs/AgNPs, and (E) XRD patterns of CNFs/AgNPs and CNFs. of PAN was prepared in DMF, and it was electrospun at an applied electric voltage of 10 kV. The PAN nanofibers were then stabilized under air flow at 270°C for 1 h and subsequently carbonized under N2 atmosphere at 1000°C for 1 h at the rate of 5°C/min. After the preparation of CNFs from PAN nanofibers, the CNFs were treated with HNO3, centrifuged, and washed with water for several times. Finally an aqueous mixture of glucose, Ag(NH3)2OH, and CNFs was stirred for 5 min. After being stirred for more than 5 min, the mixture was transferred into a Teflon-lined autoclave, and it was sealed in a stainless steel tank and heated at 180°C for 3 h. Finally the AgNP-immobilized CNFs (Ag/CNFs) were obtained. Yu and co-workers [47] prepared electrospun Ag/g-C3N4-loaded composite carbon nanofibers (Ag/g-C3N4/CNFs) through combing the electrospinning tech- nology and carbonization treatment. The microstructure of Ag/g-C3N4/CNFs was characterized by XRD, FE-SEM, EDS, TEM, and XPS. Ghouri et al. [48] achieved Co/CeO2-decorated carbon nanofibers (Co/CeO2/ CNFs) by calcination of electrospun nanofibers composed of cerium (III) acetate hydrate, cobalt (II) acetate tetrahydrate, and poly(vinyl alcohol) in nitrogen envi- ronment at 700°C. PVA was used as carbon source due to its high carbon content. In a typical preparation, CoAc and CeAc aqueous solutions were prepared in distilled water. The resultant aqueous solutions were mixed with PVA aqueous solution. After stirring for 6 h, the mixture was electrospun at high voltage of 22 kV using DC 7PDF Image | Preparation, Characterization, and Applications of Electrospun Carbon Nanofibers
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