Ensembles of freeze-dried self-rolled polymer micro-scrolls are explored as template media for produc- ing carbon-iron based composites with fibrous morphology. Polymer fibres impregnated with furfuryl alcohol and loa...Ensembles of freeze-dried self-rolled polymer micro-scrolls are explored as template media for produc- ing carbon-iron based composites with fibrous morphology. Polymer fibres impregnated with furfuryl alcohol and loaded with Fe2O3 particles, were thermally treated under inert atmosphere at 700 ℃ and subsequently analysed by scanning and transmission electron microscopy, X-ray diffraction, thermogravimetric analysis, and nitrogen adsorption. The resulting material has a micro-fibrous mor- phology and is basically composed of metallic Fe^0 and FeO particles, i.e., more than 98 wt% of the carbon/ iron-based composite mass. These particles are held together by amorphous porous carbon foam obtained by in-situ carbonization of the polymer/Fe2O3 composite with evacuation of carbon from the system via COx gases released by carbo-reduction of Fe2O3. The material has significant activity in the reaction of catalytic decomposition of hydrogen peroxide in water solutions.展开更多
CONSPECTUS:Carbon is an abundant material with remarkable thermal,mechanical,physical,and chemical properties.Each allotrope has unique structures,properties,functionalities,and corresponding applications.Over the pas...CONSPECTUS:Carbon is an abundant material with remarkable thermal,mechanical,physical,and chemical properties.Each allotrope has unique structures,properties,functionalities,and corresponding applications.Over the past few decades,various types of carbon materials such as graphene,carbon nanotubes,carbon quantum dots,and carbon fibers have been produced,finding applications in energy conversion and storage,water treatment,sensing,polymer composites,and biomedical fields.Among these carbon materials,porous carbons are highly interesting owing to their large surface areas and massive active sites to interact with molecules,ions,and other chemical species.The pore size and pore size distributions can be tunable(micro-,meso-,and macro-pores),providing chemical species with hierarchical structures to transport with low resistances.In this context,designing carbon precursors and preparing porous carbon with desired structures,properties,and functionalities are highly significant.展开更多
基金supported by the French National Research Agency (No. ANR-13-IS09-0002-01)
文摘Ensembles of freeze-dried self-rolled polymer micro-scrolls are explored as template media for produc- ing carbon-iron based composites with fibrous morphology. Polymer fibres impregnated with furfuryl alcohol and loaded with Fe2O3 particles, were thermally treated under inert atmosphere at 700 ℃ and subsequently analysed by scanning and transmission electron microscopy, X-ray diffraction, thermogravimetric analysis, and nitrogen adsorption. The resulting material has a micro-fibrous mor- phology and is basically composed of metallic Fe^0 and FeO particles, i.e., more than 98 wt% of the carbon/ iron-based composite mass. These particles are held together by amorphous porous carbon foam obtained by in-situ carbonization of the polymer/Fe2O3 composite with evacuation of carbon from the system via COx gases released by carbo-reduction of Fe2O3. The material has significant activity in the reaction of catalytic decomposition of hydrogen peroxide in water solutions.
基金supported by NSF Award DMR-2411680support by the Naval Enterprise Partnership Teaming with Universities for National Excellence(NEPTUNE)Office of Naval Research(Grant#N000142312609),the Program Manager,Corey T.Love.
文摘CONSPECTUS:Carbon is an abundant material with remarkable thermal,mechanical,physical,and chemical properties.Each allotrope has unique structures,properties,functionalities,and corresponding applications.Over the past few decades,various types of carbon materials such as graphene,carbon nanotubes,carbon quantum dots,and carbon fibers have been produced,finding applications in energy conversion and storage,water treatment,sensing,polymer composites,and biomedical fields.Among these carbon materials,porous carbons are highly interesting owing to their large surface areas and massive active sites to interact with molecules,ions,and other chemical species.The pore size and pore size distributions can be tunable(micro-,meso-,and macro-pores),providing chemical species with hierarchical structures to transport with low resistances.In this context,designing carbon precursors and preparing porous carbon with desired structures,properties,and functionalities are highly significant.
