Abstract
In this paper, a low-cost graphene exfoliation method suitable for large-scale production was explored. The pure scCO2 was used as the exfoliation agent. In addition, a flow channel structure was designed to perform field strengthening induced cavitation, and high pressure and cavitation field were combined to directly prepare graphene. In the optimization of operating conditions, the effects of circular time, reaction pressure, circular flow rate and centrifugal speed on the exfoliation were studied. The graphene product has a maximum dispersion concentration of 0.701 mg·mL−1 and the intensity ratio ID/IG of 0.181, which guaranteed the yield while taking into account the graphene quality. The proportion of graphene with less than five layers was 68%, 75% of the lateral dimensions were in the range of (1−4) μm. Finally, the existence of cavitation field was verified by numerical simulation to provide a basis for further optimization.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
