原位水热法制备石墨烯/Co_3O_4复合材料的研究
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摘要
基于壳聚糖对石墨烯的分散作用及壳聚糖对钴离子的螯合作用,采用原位水热法实现了石墨烯/Co_3O_4复合材料的制备。采用球磨法制备石墨烯,避免了氧化还原法制备石墨烯引起的物理性能下降;采用原位水热法制备复合材料,确保了复合材料的均匀性。XRD结果表明:实现石墨烯/Co_3O_4复合材料的制备。水热反应温度显著影响复合材料前驱体形貌,FTIR结果表明随着水热温度的提高,壳聚糖炭化加剧,前驱体由大块团聚体转变为颗粒状前驱体。经煅烧前驱体转变为石墨烯/Co_3O_4复合材料,Co_3O_4颗粒均匀负载于片层状石墨烯表面,二者分散均匀。
Based on the dispersion effect of chitosan on graphene and chelation effect of chitosan on Co ions, a hydrothermal method was used for graphene/Co_3O_4 nanocomposites. Ball milling was used for graphene which avoided the properties decrease. In-situ hydrothermal method was used which induced fine dispersion of graphene and Co_3O_4. XRD results indicate that graphene/Co_3O_4 nanocomposites are obtained. The hydrothermal temperature has a significant effect on morphologies of precursor. With the temperature increasing, the precursor changes from aggregation to particles. Graphene/Co_3O_4 nanocomposites are obtained after heat treatment of precursor. Co_3O_4 distributes uniformly on graphene nanosheets.
Based on the dispersion effect of chitosan on graphene and chelation effect of chitosan on Co ions, a hydrothermal method was used for graphene/Co_3O_4 nanocomposites. Ball milling was used for graphene which avoided the properties decrease. In-situ hydrothermal method was used which induced fine dispersion of graphene and Co_3O_4. XRD results indicate that graphene/Co_3O_4 nanocomposites are obtained. The hydrothermal temperature has a significant effect on morphologies of precursor. With the temperature increasing, the precursor changes from aggregation to particles. Graphene/Co_3O_4 nanocomposites are obtained after heat treatment of precursor. Co_3O_4 distributes uniformly on graphene nanosheets.
引文
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[2]Sun Y,Chen Z,Noh H et al.Nature Materials[J],2012,11:942
[3]Liu J,Zhang J,Yang Z et al.Adv Funct Mater[J],2013,23(8):929
[4]Poizot P,Laruelle S,Grugeon S et al.Nature[J],2000,407:496
[5]Cheng J,Yu J,Shi D et al.Appl Phys A[J],2012,106:837
[6]Zhao Mingjian(赵明坚),Cao Gaoshao(曹高劭),Xie Jian(谢健)et al.Rare Metal Materials and Engineering(稀有金属材料与工程)[J],2005,34(12):1857