| 摘要 |
A process for producing an integrated layer (10 nm to 500 μm) of highly oriented halogenated graphene sheets, comprising: (a) preparing a graphene oxide (GO) dispersion having GO sheets dispersed in a fluid medium; (b) dispensing and depositing a layer of GO dispersion onto a surface of a supporting substrate under a shear stress condition that induces orientation of GO sheets to form a wet layer of GO on the supporting substrate; (c) introducing a halogenating agent into the wet layer of graphene oxide and effecting a chemical reaction between the halogenating agent and GO sheets to form a wet layer of halogenated graphene, C6ZxOy, wherein;Z is a halogen element selected from F, Cl, Br, I, or a combination thereof, x=0.01 to 6.0, y=0 to 5.0, and x+y≦6.0; and (d) removing the fluid medium. |
| 主权项 |
1. A process for producing an integrated layer of highly oriented halogenated graphene sheets or molecules, said process comprising:
(a) preparing either a graphene oxide dispersion having graphene oxide sheets dispersed in a fluid medium or a graphene oxide gel having graphene oxide molecules dissolved in a fluid medium, wherein said graphene oxide sheets or graphene oxide molecules contain an oxygen amount higher than 5% by weight; (b) dispensing and depositing a layer of said graphene oxide dispersion or graphene oxide gel onto a surface of a supporting substrate under a shear stress condition, wherein said dispensing and depositing procedure includes shear-induced thinning of said graphene oxide dispersion or gel and shear-induced orientation of graphene oxide sheets or molecules, to form a wet layer of graphene oxide on said supporting substrate; and (c) either (i) introducing a halogenating agent into said wet layer of graphene oxide and effecting a chemical reaction between said halogenating agent and said graphene oxide sheets or molecules to form a wet layer of halogenated graphene and removing said fluid medium from said wet layer of halogenated graphene, or (ii) removing said fluid medium from the wet layer of graphene oxide to form a dried layer of graphene oxide and introducing a halogenating agent into said dried layer of graphene oxide and effecting a chemical reaction between said halogenating agent and said graphene oxide sheets or molecules, to form a dried integrated layer of halogenated graphene having a chemical formula of C6ZxOy, wherein Z is a halogen element selected from F, Cl, Br, I, or a combination thereof, x=0.01 to 6.0, y=0 to 5.0, and x+y≦6.0; and said integrated layer of halogenated graphene has an inter-planar spacing d002 of 0.35 nm to 1.2 nm as determined by X-ray diffraction. |
