STUDIES ON THE CHEMICAL STRUCTURES OF ACTIVATED CARBON FIBERS BY SOLID STATE NMR-中国期刊网

摘要 ThesolidstateC13-NMRspectraofdifferentACFsfromvariousprecursorfiberswererecordedinthispaper,TheeffectsofactivationconditionsonchemicalstructuresofACFs,aswellasthechangesofchemicalstructuresduringcarbonizationandredoxreactionwereinverstigatedbyNMRtechnique,Atsametime,thesoildstateP31-NMRspectraofACFSarestudied.TheC13-NMRspectraofACFscanbedividedintosixbandsthatareassignedtomethylandmethylenegroups,hydroxylandethergroups.acetal(ormethylenedioxy)carbon,graphite-likearomaticcarbonstructure,phenol,andquinonegroups,respectively.OnlyphosphorouspentoxideexistsonACFsandCFs.Moreover,mostofthemarestuckoverthecrystalfacebutnotattheedgeofgraphite-likemicro-crystal.ThecarbonizationandactivationconditionsaffecttheC13-NMRspectraofACFs.TheexperimentalrsultsindicatethattheredoxreactionofACFswithoxidantsgreatlyconsumesC-Hgroup.

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STUDIES ON THE CHEMICAL STRUCTURES OF ACTIVATED CARBON FIBERS BY SOLID STATE NMR

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STUDIES ON THE CHEMICAL STRUCTURES OF ACTIVATED CARBON FIBERS BY SOLID STATE NMR

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