Solution plasma is a unique method which provides a direct discharge in solutions. It is one of the promising techniques for various applications including the synthesis of metallic/non-metallic nanomaterials, decomposition of organic compounds, and the removal of microorganism. In the context of na...
Solution plasma is a unique method which provides a direct discharge in solutions. It is one of the promising techniques for various applications including the synthesis of metallic/non-metallic nanomaterials, decomposition of organic compounds, and the removal of microorganism. In the context of nanomaterial syntheses, solution plasma has been utilized to produce carbon nanoparticles and metallic-carbon nanoparticle systems. The main purpose of this study was to synthesize nickel nanoparticles embedded in a matrix of carbon particles by solution plasma in one-step using waste vegetable oil as the carbon source. The experimental setup was done by simply connecting a bipolar pulsed power generator to nickel electrodes, which were submerged in the waste vegetable oil. Black powders of the nickel nanoparticles-embedded carbon (NiNPs/Carbon) particles were successfully obtained after discharging for 90 min. The morphology of the synthesized NiNPs/Carbon was investigated by a scanning electron microscope, which revealed a good dispersion of NiNPs in the carbon-particle matrix. The X-ray diffraction of NiNPs/Carbon clearly showed the co-existence of crystalline Ni nanostructures and amorphous carbon. The crystallite size of NiNPs (through the Ni (111) diffraction plane), as calculated by the Scherrer equation was found to be 64 nm. In addition, the catalytic activity of NiNPs/Carbon was evaluated by cyclic voltammetry in an acid solution. It was found that NiNPs/Carbon did not show a significant catalytic activity in the acid solution. Although this work might not be helpful in enhancing the activity of the fuel cell catalysts, it is expected to find application in other processes such as the CO conversion (by oxidation) and cyclization of organic compounds.
Solution plasma is a unique method which provides a direct discharge in solutions. It is one of the promising techniques for various applications including the synthesis of metallic/non-metallic nanomaterials, decomposition of organic compounds, and the removal of microorganism. In the context of nanomaterial syntheses, solution plasma has been utilized to produce carbon nanoparticles and metallic-carbon nanoparticle systems. The main purpose of this study was to synthesize nickel nanoparticles embedded in a matrix of carbon particles by solution plasma in one-step using waste vegetable oil as the carbon source. The experimental setup was done by simply connecting a bipolar pulsed power generator to nickel electrodes, which were submerged in the waste vegetable oil. Black powders of the nickel nanoparticles-embedded carbon (NiNPs/Carbon) particles were successfully obtained after discharging for 90 min. The morphology of the synthesized NiNPs/Carbon was investigated by a scanning electron microscope, which revealed a good dispersion of NiNPs in the carbon-particle matrix. The X-ray diffraction of NiNPs/Carbon clearly showed the co-existence of crystalline Ni nanostructures and amorphous carbon. The crystallite size of NiNPs (through the Ni (111) diffraction plane), as calculated by the Scherrer equation was found to be 64 nm. In addition, the catalytic activity of NiNPs/Carbon was evaluated by cyclic voltammetry in an acid solution. It was found that NiNPs/Carbon did not show a significant catalytic activity in the acid solution. Although this work might not be helpful in enhancing the activity of the fuel cell catalysts, it is expected to find application in other processes such as the CO conversion (by oxidation) and cyclization of organic compounds.
* AI 자동 식별 결과로 적합하지 않은 문장이 있을 수 있으니, 이용에 유의하시기 바랍니다.
제안 방법
Several characterization techniques such as scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), and X-ray diffraction (XRD) were used to investigate the morphology, elemental composition, and crystal structure of NiNPs/Carbon, respectively. In addition, cyclic voltammetry (CV) was carried out to evaluate the catalytic activity of NiNPs/Carbon towards oxygen reduction.
대상 데이터
The CV measurements were carried out in a three-electrode cell (µAUTOLABIII/FRA2) using 0.1 M H2SO4 as the electrolyte.
A 100 mL glass beaker was used as the reactor into which two Ni electrodes with a diameter of 1 mm were introduced. Waste vegetable oil obtained from a school canteen was used as the carbon precursor. The waste vegetable oil was poured into the reactor.
이론/모형
In this study, the NiNPs-embedded carbon (NiNPs/Carbon) particles were prepared by a one-step synthesis procedure using solution plasma [12]. NiNPs were formed by the sputtering effect at Ni electrodes and the carbon particles were formed by the dissociation and recombination of carbon species in waste vegetable oil during the solution plasma discharge.
성능/효과
NiNPs were formed by the sputtering of the Ni electrodes and the carbon particles were obtained simultaneously from the waste vegetable oil during the solution plasma discharge. The SEM and XRD results revealed that the spherical NiNPs were embedded in the carbon-particle matrix and had a crystallite size of about 64 nm. Although the CV results indicated that NiNPs/Carbon could not catalyze oxygen reduction in acidic media, it is expected to be a promising catalyst for other processes such as the CO conversion, cyclization, and cycloaddition of organic compounds.
참고문헌 (16)
O. Takai, "Solution plasma processing (SPP)," Pure and Applied Chemistry, vol. 80, no. 9, pp. 2003-2011, 2008.
P. Pootawang, N. Saito, O. Takai, and S. Y. Lee, "Rapid synthesis of ordered hexagonal mesoporous silica and their incorporation with Ag nanoparticles by solution plasma," Materials Research Bulletin, vol. 47, no. 10, pp. 2726-2729, 2012.
P. Pootawang, N. Saito, and O.Takai, "Solution plasma process for template removal in mesoporous silica synthesis," Japanese Journal of Applied Physics, vol. 49, no.12R, pp. 126202-1-7, 2010.
P. Pootawang, N. Saito, O. Takai, and S. Y. Lee, "Synthesis and characteristics of Ag/Pt bimetallic nanocomposites by arc-discharge solution plasma processing," Nanotechnology, vol. 23, pp. 395602-1-8, 2012.
P. Pootawang, N. Saito, and S. Y. Lee, "Discharge time dependence of a solution plasma process for colloidal copper nanoparticle synthesis and particle characteristics," Nanotechnology, vol. 24, pp. 055604-1-9, 2013.
J. Kang, O. L. Li, and N. Saito, "A simple synthesis method for nano-metal catalyst supported on mesoporous carbon: the solution plasma process," Nanoscale, vol. 5, pp. 6874-6882, 2013.
J. Kang and N. Saito, "In situ solution plasma synthesis of mesoporous nanocarbon-supported bimetallic nanoparticles," RSC Advances, vol. 5, pp. 29131-29134, 2015.
D. W. Kim, O. L. Li, P. Pootawang, and N. Saito, "Solution plasma synthesis process of tungsten carbide on N-doped carbon nanocomposite with enhanced catalytic ORR activity and durability," RSC Advances, vol. 4, pp. 16813-16819, 2014.
Y. G. Morozov, O. V. Belousova, and M. V. Kuznetsov, "Preparation of nickel nanoparticles for catalytic applications," Inorganic Materials, vol. 47, no. 1, pp. 36-40, 2011.
B. Li, S. Amiruddin, and J. Prakash, "A kinetics study of oxygen reduction reaction on Palladium-Nickel alloy," ECS Transactions, vol. 11, no. 1, pp. 235-240, 2007.
G. Pansuwan, S. Phuksawattanachai, K. Kerdthip, N. Sungworawongpana, S. Nounjeen, S. Anantachaisilp, J. Kang, G. Panomsuwan, T. Ueno, N. Saito, and P. Pootawang, "Nickel Nanoparticles-embedded Carbon particle fabrication by solution plasma in waste vegetable oil," Proceedings of the ISMT 2016, p. 68, 2016.
R. A. Landa, P. S. Antonel, M. M. Ruiz, O. E. Perez, A. Butera, G. Jorge, C. L. P. Oliveira, and R. M. Negri, "Magnetic and elastic anisotropy in magnetorheological elastomers using nickel-based nanoparticles and nanochains," Journal of Applied Physics, vol. 114, pp. 213912-1-11, 2013.
A. E. Sanli and A. Aytac, "Electrochemistry of the nickel electrode as a cathode catalyst in the media of acidic peroxide for application of the peroxide fuel cell," ECS Transactions, vol. 42, no. 1, pp. 3-22, 2012.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.