Effect of static pressure on ultrasonic liquid phase exfoliation of few-layer graphene
Abstrak
Ultrasonic Liquid Phase Exfoliation (LPE) has gathered attention from both scientific and industrial communities for its accessibility and cost-effectiveness in producing graphene. However, this technique has faced challenges such as low yield and long production time. In this study, we developed a cyclic ultrasonication system to exfoliate expanded graphite (EG) by applying static pressure to a flow chamber to address these challenges. Using deionized water (DIW) as solvent and polyvinylpyrrolidone (PVP) as dispersion, we obtained graphene slurries with an average lateral size of 7 μm and averaged number of layers of 3.5 layers, after 40 min of ultrasonication. After centrifugation, the yield of single and bilayer graphene was approximately 16 %. The findings showed that regulating hydrostatic pressure can effectively affect the lateral size and number of layers of few-layer graphene. The proposed method is of good potential for scaled-up production of few-layer graphene.
Topik & Kata Kunci
Penulis (9)
Hu Zong
Minhui Gao
Aziz Ul Hassan Mohsan
Yibiao Lin
Ying Zhou
Lei Yu
Su Zhao
Yifei Li
Jiahao Zhang
Akses Cepat
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Cek di sumber asli →- Tahun Terbit
- 2024
- Sumber Database
- DOAJ
- DOI
- 10.1016/j.ultsonch.2024.106863
- Akses
- Open Access ✓