Highly Ordered Commercial Graphene Manufactured from 3 Simple Steps: Graphene Arc discharge from Graphite Electrodes, Ball Milling and Microwave Treatment
| Main Author: | Oluwaseun John DADA |
|---|---|
| Format: | Article |
| Bahasa: | eng |
| Terbitan: |
, 2019
|
| Subjects: | |
| Online Access: |
https://zenodo.org/record/2614861 |
Daftar Isi:
- Low cost, low defect and high-quality graphene have been produced in three simple exfoliation steps as a fully tested commercial concept. Low energy thermal arc-discharging expands the electrolytic graphite rod electrodes into hierarchical-like 3D graphene retaining the graphite structural order on a basal plane and chemical purity. Multi-size ball milling causes movement of the graphene materials in multi-shear directions, with optimized speed of the balls and lesser time. Micro-waving further separates the graphene sheets by “thermal expansion and release” mechanism utilizing thermally induced lattice vibrations. This also causes higher lattice order on basal plane improving directional and surface properties. The produced graphene (XRD 2theta = 26 degrees) has low defect (0.05 < ID/IG < 0.2), retains chemical purity (0.56-2.4% change in O2 content), and with comparatively optimized effective nano-sizes (ranging from 300nm to 35um). These properties make the graphene suitable for diverse applications, dispersibility in various solvents, conformability to flat semitransparent surfaces, and storable in concentrated slurries (>50 mg mL−1) or powder.
- *Oluwaseun John Dada received his PhD in Mechanical Engineering Nanotechnology Concentration at Hong Kong University of Science and Technology, Hong Kong. † Dr Dada is Director of Engineering, NanoScale and Advanced Manufacturing Lab, Signature EcoSystem Ltd.