石墨烯薄膜及中间产物的结构及导电性能研究.pdfVIP

第 11卷第2期 显微与测量 V0l_l1No．2 2014年 4月 Microtechnique Measurement April2014 石墨烯薄膜及中间产物的 结构及导电性能研究 孙红娟 -，，林舜嘉-一，彭同江一，黄 桥 (西南科技大学矿物材料及应用研究所，NI)~I绵阳621010) (西南科技大学固体废物处理与资源化教育部重点实验室，NI)II绵阳621010) 摘 要 ：采用氧化还原法真空抽滤制备不同还原程度的石墨烯薄膜，用x射线衍射 (XRD)、红外 光谱 (FTIR)、拉曼光谱 (Raman)、四探针 电阻率测试仪对石墨烯样品及 中间产物表征。结果表 明，石墨经氧化后结构层键合上多种含氧官能团，层间距增大，其拉曼光谱表现为D峰宽化且增 强，C峰宽化并向高波数方向偏移，且导电性能急剧减弱。通过改变还原阶段的反应时间可对石墨 烯的电学性能进行有效调控。 关键词：氧化石墨；石墨烯薄膜；氧化还原法；结构；电导率 ResearchonStructuralandElectricPropertiesofGraphene—based M acroscopicM embraneandIntermediateProducts SUNHong-juan ，LINShun-jia，PENGTong-jiang，HUANGQiao (1．InstituteofMineralMaterialsApplicati0n，SouthwestUniversity ofScienceandTechnology，Mianyang621010，China) (2．KeyLaboratoryofSolidWasteTreatmentandResourceRecycle，Ministry ofEducation，SouthwestUniversityofScienceandTechnoloyg，Mianyang621010，China) Abstract：The graphene——based macroscopicmembraneswith differentreduction levelswere prepared by an oxidation—— reduction methodwith the controlling ofreduction time，and followed by vacuum filtration．Thestructuralanalysisand electricalconductivityofthesampleswerecarriedoutbyusingXRD，FTIR，RamanandFour-pointprobemeasurement．The resultssuggestthatthesturcturelayersofgraphitearebondedwithmanyoxygen—containinggroupsonbothsidesafterthe oxidationprocess，leadingtOan increaseininterlayerspacing．AndtheG peakofRamanspecturm forgraphitebroadensand shiftstohigherwavenumberposition，andtheD Peakbroadensand increasesitsintensity．Theelectricalproperty ofthe chemicallyconvertedgraphenecanbeeffectivelytunedbycontrollingthereductiontime． Keywords：graphite oxide；graphene—based macroscopic membra