一种石墨烯与MoS 2 的复合纳米材料及其制备方法

The present invention discloses a composite nanomaterial of graphene and MoS₂ and its preparation method. The composite material is composed of graphene and MoS₂ nanomaterials, and the molar ratio between graphene and MoS₂ nanomaterials is 1∶1 - 4∶1. The preparation method is as follows: first, graphite is prepared into graphene oxide nanosheets by a chemical oxidation method, then molybdate is dissolved in deionized water to form a 0.02 - 0.07M solution, and L - cysteine is added as a sulfur source and a reducing agent, with the molar ratio of L - cysteine to molybdate being 5∶1 - 12∶1. Then the graphene oxide nanosheets are added to this solution, and ultrasonic treatment is carried out to make the graphene oxide nanosheets fully dispersed in the hydrothermal reaction solution. The mixture is transferred into a hydrothermal reaction kettle and sealed, and the composite nanomaterial of graphene and MoS₂ is synthesized by a one - step hydrothermal method, with the molar ratio of graphene nanosheets to molybdenum disulfide in the composite material being 1∶1 - 4∶1. The method of the present invention has the characteristics of mild reaction conditions and simple process. The composite nanomaterial of graphene and MoS₂ synthesized by the present invention has wide applications as electrode materials for new energy batteries, high - performance solid lubricants and catalyst supports, etc.

本发明公开了一种石墨烯与MoS2的复合纳米材料及其其制备方法，复合材料由石墨烯和MoS2纳米材料复合构成，石墨烯与MoS2纳米材料的之间物质量之比为1∶1-4∶1；其制备方法是先用化学氧化法将石墨制备成氧化石墨纳米片，然后用钼酸盐溶解在去离子水中形成0.02～0.07M的溶液，加入L-半胱氨作为硫源和还原剂，L-半胱氨与钼酸盐的物质量的比为5∶1～12∶1，再将氧化石墨纳米片加入该溶液中，超声处理使氧化石墨纳米片充分分散在水热反应溶液中，将该混合物转入水热反应釜中密封，通过一步水热方法合成得到石墨烯与MoS2的复合纳米材料，复合材料中石墨烯纳米片与二硫化钼的物质量之比为1∶1-4∶1。本发明的方法具有反应条件温和和工艺简单的特点。本发明合成的石墨烯与MoS2的复合纳米材料作为新能源电池的电极材料、高性能国体润滑剂和催化剂载体等具有广泛的应用。