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1. Graphite Whiskers Derived from Waste Coffee Grounds Treated at High Temperature

Author

Gan Jet Hong Melvin, Zhipeng Wang, Shingo Morimoto, Masatsugu Fujishige, Kenji Takeuchi, Yoshio Hashimoto, and Morinobu Endo

Subjects
coffee grounds, graphite whiskers, high temperature, Raman spectroscopy, Technology, Environmental sciences, GE1-350
Abstract

Abstract 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.

Published
2019
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2. Graphite Whiskers Derived from Waste Coffee Grounds Treated at High Temperature

Author

Zhipeng Wang, Yoshio Hashimoto, Kenji Takeuchi, Masatsugu Fujishige, Morinobu Endo, Gan Jet Hong Melvin, and Shingo Morimoto

Subjects
Technology, Materials science, Communication, Whiskers, Shell (structure), Analytical chemistry, chemistry.chemical_element, coffee grounds, Disclination, Carbon layer, Communications, graphite whiskers, high temperature, Environmental sciences, symbols.namesake, Coffee grounds, chemistry, Raman spectroscopy, symbols, GE1-350, Graphite, Carbon
Abstract

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.

Published
2019

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