The freeze-thaw technique for exfoliation of graphite: A novel approach for bulk production of scroll-free graphene oxide sheets

Vishal S. Makadia1*, Lalit M. Manocha2, Satish Manocha3, Hasmukh L. Gajera4

1R&D Dept., Royal Castor Products Ltd., Siddhpur, Gujarat 384151, India

2DMSRDE, GT Road, Kanpur, Uttar Pradesh 208013, India

3University School of Basic and Applied Science, GGS Indraprastha University, Delhi, 110078, India

4Dept. of Phy. Sci., PDPIAS, Charotar University of Science and Technology, Changa , 388421, Gujarat, India

Adv. Mater. Lett., 2017, 8 (3), pp 262-264

DOI: 10.5185/amlett.2017.6407

Publication Date (Web): Jan 28, 2017

E-mail: vishalkumar.makadia@gmail.com

Abstract


A freeze-thaw technique is put forth as a novel approach to exfoliating graphene oxide sheets (GO-sheets) in aqueous media.  This method does not use shear force or high-temperature treatment at any stage. Avoiding these factors prevents scrolling and promotes defect-free synthesis of the graphitic planes.  The research shows how the freeze-thaw technique successfully exfoliates graphitic planes without producing scrolls or defective graphene oxide planes. Further, when compared to conventional exfoliation methods, it was found that the freeze-thaw technique increased the surface area significantly. 

Keywords

Freeze-thaw, graphene oxide, exfoliation, carbon materials, nanoparticles.

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