Electrospun one-dimensional graphitic carbon nitride-coated carbon hybrid nanofibers (GCN/CNFs) for photoelectrochemical applications
- Authors
- 장준영; 강수희; Rajendra C. Pawar; 이선영
- Issue Date
- Sep-2018
- Publisher
- 한국물리학회
- Keywords
- Photocatalyst; Graphitic carbon nitride; Electrospinning; Carbon nanofibers
- Citation
- Current Applied Physics, v.18, no.9, pp.1006 - 1012
- Indexed
- SCIE
SCOPUS
KCI
- Journal Title
- Current Applied Physics
- Volume
- 18
- Number
- 9
- Start Page
- 1006
- End Page
- 1012
- URI
- https://scholarworks.bwise.kr/erica/handle/2021.sw.erica/7364
- DOI
- 10.1016/j.cap.2018.05.016
- ISSN
- 1567-1739
- Abstract
- Coupling of graphitic carbon nitride (GCN) with electrospun carbon nanofibers (CNFs) enhanced the photoelectrochemical (PEC) performance of a pristine GCN photoanode. Polyacrylonitrile (PAN) was electrospun to form fibers that were then carbonized to form one-dimensional (1D) CNFs, which were then used to fabricate the GCN structure. The optimum GCN/CNFs hybrid structure was obtained by controlling the amount of GCN precursors (urea/thiourea). The surface morphology of the hybrid structure revealed the coating of GCN on the CNFs. Additionally, X-ray photoelectron spectroscopy, Fourier-transform infrared spectroscopy, and X-ray diffraction confirmed the phases of the GCN/CNFs hybrids. PEC results showed a higher photocurrent of 3 μA for the hybrid compared with that of 1 μA for the pristine GCN. The high photocurrent for the hybrid structures indicated the formation of heterojunctions that resulted from a lower recombination rate of charge carriers.
Moreover, UTh0.075 (0.075 g of urea and 0.075 g of thiourea) hybrid sample showed the highest performance of hydrogen generation with its numerical value of 437 μmol/g, compared to those of UTh0.1(0.1 g of urea and 0.1 g of thiourea) and UTh0.05 (0.05 g of urea and 0.05 g of thiourea) composite samples. This higher hydrogen production could be explained again with successful formation of heterojunctions between GCN and CNFs.
Overall, we report a new approach for obtaining 1D hybrid structures, having better PEC performance than that of pristine GCN. These hybrids could potentially be used in energy-related devices.
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