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Graphite Whiskers Derived from Waste Coffee Grounds Treated at High Temperature

Melvin GJH 1 , Wang Z 2 , Morimoto S 3 , Fujishige M 3 , Takeuchi K 3 , Hashimoto Y 3 Show all authors , Endo M 3

Affiliations 

  • 1 Material and Mineral Research Unit Faculty of Engineering Universiti Malaysia Sabah Jalan UMS 88400 Kota Kinabalu Sabah Malaysia
  • 2 Institute of Advanced Materials Jiangxi Normal University 99 Ziyang Avenue Nanchang Jiangxi 330022 China
  • 3 Institute of Carbon Science and Technology Shinshu University 4-17-1 Wakasato Nagano 380-8553 Japan
Glob Chall, 2019 Aug;3(8):1800107.
PMID: 31565389 DOI: 10.1002/gch2.201800107

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.

* Title and MeSH Headings from MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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