Graphite Whiskers Derived from Waste Coffee Grounds Treated at High Temperature

Graphite Whiskers Derived from Waste Coffee Grounds Treated at High Temperature

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, respectiv...

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Bibliographic Details
Main Authors: Gan Jet Hong Melvin, Zhipeng Wang, Shingo Morimoto, Masatsugu Fujishige, Kenji Takeuchi, Yoshio Hashimoto, Morinobu Endo
Format: Article
Language:English
Published: Wiley 2019-08-01
Series:Global Challenges
Subjects:
coffee grounds
graphite whiskers
high temperature
Raman spectroscopy
Online Access:https://doi.org/10.1002/gch2.201800107
Description
Summary: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.
ISSN:2056-6646

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