Dissertation > Industrial Technology > General industrial technology > Materials science and engineering > Special structural materials

Synthesis of Application of Functionalized Graphene Nanocomposites

Author ChengJinSheng
Tutor LiJingHong
School University of Science and Technology of China
Course Analytical Chemistry
Keywords Functionalization graphene nanomaterial synthesis application
CLC TB383.1
Type PhD thesis
Year 2011
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Graphene has attracted great interests due to the excellent electronic, mechanical and thermal properties arising from its unique two-dimensional structure. Such fascinating properties render graphene as a promising candidate in various of applications. By functionalization methods, different graphene nanocomposites can be obtained readily. Through these approaches, the intrinsic properties of graphene would be preserved, some special properties can be also introduced. Further studies would discover a series of novel graphene nanocomposites with superior properties, which can provide scientific and technological background for further applicationIn the present work, we studied the various methods used in the functionalization of graphene, the detailed types of the functionalization of graphene together with the electrical and catalytic performance of functionalized graphene nanocomposites. Especially, we studied the facile preparation of the functionalized graphene nanocomposites and the electrical and catalytic application of graphene nanocomposites, below shows the details:1. Facile preparation of the functionalized graphene nanocompositesWe prepared the Ge/graphene nanocomposites by one-pot method, meanwhile, the Pd NPs/chitosan functionalized graphene was prepared by mild ethylene glycol reduction method. The Pd NPs/graphene oxide nanocomposites together with biocompatible three-dimensional chitosan–graphene mesostructures with large surface area were also prepared. Furthermore, large-scale graphene (≥4μm) was prepared by microwave-assisted exfoliation of graphite directly, the intrinsic properties of graphene can be preserved, such material hold good prospects in biosensors and electrical devices etc..2. The electrical and catalytic application of graphene nanocomposites.The Ge nanoparticles/graphene nanocomposites were used as anode material in lithium-ion-battery successfully, which can be recycled for 15 cycles. The Pd nanoparticles/chitosan functionalized graphene was applied to the cyclotrimerization reaction of acetylene, such nanocomposites can be recycled for more than 3 cycles. The Pd nanoparticles/graphene oxide nanocomposites can be used to catalyze the Ullmann reactions of aryl halides. What’s more, we studied the preparation of the biocompatible three-dimensional chitosan–graphene mesostructures and its application as absorbent for reactive black 5 removal from aqueous solution with high efficiency.

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