Enhanced Field Electron Emission from Electrospun Co-Loaded Activated Porous Carbon Nanofibers

Abstract

Highly porous, Co-loaded, activated carbon nanofibers (Co/AP-CNFs) were prepared by electrospinning a CoCl2-containing polyacrylonitrile composite, followed by thermal treatment processes under air and inert atmospheres. Observations show that carbon nanofibers (CNFs) generated in this fashion have a dramatically large porosity that results in an increase in the specific surface area from 193.5 to 417.3 m(2) g(-1)as a consequence of the presence of CoCl2 in PAN/CoCl2 precursor nanofibers. The nanofibers have a larger graphitic structure, which is enhanced by the addition of the cobaltous phase during the carbonization process. Besides evaluating the morphological and material features of the fibers, we have also carried out a field electron emission investigation of the fibers. The results show that an enhancement in the field electron emission of Co/AP-CNFs occurs as a result of the existence of cobalt in the carbon nanofibers, which results in a greater graphitization, increased specific total surface area and porosity of the carbon nanofibers. Overall, the Co/AP-CNFs are prepared in a facile manner and exhibit an enhanced field electron emission (54.79%) compared to that of pure CNFs, a feature that suggests their potential application to field electron emission devices.

High Lithium Storage Performance of FeS Nanodots in Porous Graphitic Carbon Nanowires

“…According to literature on Raman spectroscopy of carbon based materials, the D‐band at ≈1360 cm −1 is attributed to structural disorder and imperfections, while the G‐band at ≈1580 cm −1 is attributed to ordered graphite phase . As suggested in the literature, the existence of the 2D‐band (≈2700 cm −1 ) and the low‐intensity of the D‐band when compared to the G‐band ( I D / I G = 0.96) indicate that the carbon is highly graphitized …”

Guanine oxidation signal enhancement in single strand DNA with polyacrylonitrile/polyaniline (PAN/PAni) hybrid nanofibers

“…Decomposition of PAN is in agreement with the literature. 13 Although the residuals of the PAN/PAni composite NFs were less than the pure PAN NFs, the results appeared to fluctuate. Figure 8) in order to investigate crystalline characteristics of the samples.…”

“…Electrospinning is a promising technology for producing NFs from variety of materials including polymers, ceramics, and even metals. [11][12][13] Electrospun NFs have been produced and used for various applications such as filtration, sensors, and protective clothing. [14][15][16] Porous, multicomponent, hollow, composite, and various morphologies of NFs can be produced by changing material and process properties.…”

Fabricating series of controllable-porosity carbon nanofibers-based palladium nanoparticles catalyst with enhanced performances and reusability

“…Most of all, doping carbon with titanium, silicon, chromium, nickel, copper, magnesium, and/or iron initiates resulted in catalytic graphitization of carbon, and hence, highly graphitic structures were able to be produced at lower temperatures. Pd, another metallic element, was able to be used as a dopant for carbon to enhanced catalytic properties [34].…”