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09월 10일 16시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능
대한화학회 제124회 학술발표회 및 총회
Effect of Different Solvents on the Properties of Copper Nanoparticles Produced Via Pulsed Laser Ablation and its Enhanced Catalytic Activity
2019년 8월 29일 16시 45분 52초
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10월 17일 (목요일) 11:00~12:30
, Seung Jun Lee
, Shreyanka Shankar Naik
, Myong Yong Choi
Chemistry, Gyeongsang National University, Korea
Department of Chemistry, Gyeongsang National University, Korea
Copper nanoparticles with a range of different surface morphologies were synthesized by pulsed laser ablation method using a copper plate as a target in liquid media (deionized water, methanol, ethanol, 1-propanol, butanol, ethylene glycol, hexane and acetonitrile). Moreover, powder X-ray diffraction (XRD) analysis revealed that the species differ not only in shape, but also in composition. When laser ablation of a solid copper plate was carried out in acetonitrile, a core-shell nanostructure of copper@graphitic carbon (Cu@GC) and copper (I) cyanide particles were formed. While spherical and rod-like structured particles of copper (I) and (II) oxide was obtained in deionized water and methanol, respectively. The catalytic activities of the synthesized copper nanoparticles were evaluated for the reduction of 4-nitrophenol to 4-aminophenol, and nitrobenzene to aniline, as a model reaction. Based on the obtained results and pseudo-first order kinetics, the synthesized nanoparticles of copper (II) oxide and copper encapsulated in graphitic carbon layers demonstrated an enhanced catalytic performance towards the reduction of 4-nitrophenol and nitrobenzene. The enhanced catalytic activities of this catalysts might be due the unique surface morphologies and positive synergistic effect between copper nanostructures and graphitic carbon layer. The present investigation was revealed that the pulsed laser ablation of copper plate in various liquid medium is a facile method for producing of copper and copper-based nanoparticles with unique surface structure, compositions and act as an excellent catalytic material.
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