Q: What are the categories of graphene materials? A: According to the different preparation processes, graphene materials can be divided into two categories: graphene oxide and graphene, and graphene can be divided into graphene nanosheets prepared by physical method, usually denoted by GNP, and reduced graphene oxide prepared by redox method, usually denoted by rGO, according to the different preparation processes.
Q: Is the graphene dispersion sonicated? Does it need to be ultrasonicated again before use? A: Graphene dispersion is ultrasonically dispersed before leaving the factory, but since the dispersibility of graphene is poorer than that of graphene oxide, it is recommended to ultrasonicate again for 5~10min before use.
Q: What should I do if the dispersion effect deteriorates after storage for a period of time? A: A small amount of surfactant such as sodium cholate can be added to the dispersion system to reduce the surface tension of graphene and enhance its dispersion effect.
Q: How to store graphene dispersion? A: It is recommended to keep it in a ventilated, cool and dry environment, and store it separately from strong oxidizers and flammable materials.
Q: What is the particle size of graphene? A: At present, the particle size of graphene products prepared by chemical method is less than 5μm, and that of graphene products prepared by physical method is 7~12μm, if you need other sizes, please contact us for customization.
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