Graphite whiskers derived from waste coffee grounds treated at high temperature

• Main Authors: Gan Jet Hong Melvin, Zhipeng Wang, Shingo Morimoto, Masatsugu Fujishige, Kenji Takeuchi, Yoshio Hashimoto, Morinobu Endo
• Format: Article
• Language: English; English
• Published: Wiley-VCH GmbH 2019
• Subjects: QD241-441 Organic chemistry; TD783-812.5 Municipal refuse. Solid wastes
• Online Access: https://eprints.ums.edu.my/id/eprint/31059/1/Graphite%20whiskers%20derived%20from%20waste%20coffee%20grounds%20treated%20at%20high%20temperature-ABSTRACT.pdf; https://eprints.ums.edu.my/id/eprint/31059/2/Graphite%20whiskers%20derived%20from%20waste%20coffee%20grounds%20treated%20at%20high%20temperature.pdf; https://eprints.ums.edu.my/id/eprint/31059/; https://onlinelibrary.wiley.com/doi/full/10.1002/gch2.201800107; https://doi.org/10.1002/gch2.201800107

Graphite whiskers (GWs) are obtained from coffee grounds (CGs) treated at 2500 °C for 1 h in the presence of Ar gas at 1 atm. The majority of the GWs formed inside the CGs shell are rod-like with a conical tip with diameter and length in the range between 1 to 3 µm and 4 to 10 µm, respectively. At first, the carbon layer might be grown in a turbostratic manner, and then progressively graphitized at higher temperature. The strong G′ peak intensity might be induced by the disclination of graphitized carbon layers.