Non-chemically functionalized graphene exfoliated from graphite in water using ultrasonic treatment
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Publication Details
Author list: Puangbuppha B., Limsuwan P., Asanithi P.
Publisher: Elsevier
Publication year: 2012
Volume number: 32
Start page: 1094
End page: 1099
Number of pages: 6
ISSN: 1877-7058
Languages: English-Great Britain (EN-GB)
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Abstract
Single-, bi-, and multilayer graphenes were successfully prepared by sonicating bulk graphite in distilled water. Effect of different sonication times, including 3, 6, 12, 36, and 72 hours, on thickness of graphene layer were reported. Sonication time strongly affected the homogeneity and sedimentation of the graphene suspensions. Longer time of sonication enhanced the suspension homogeneity as well as increased the concentration of exfoliated graphene. The stably dispersed suspensions were obtained from 36 and 72 hours of sonication time, representing a clear gray suspension for more than 3 months. Thickness of the resulted graphenes was measured by scanning electron microscopy (SEM). UV-visible spectroscopy and Raman spectroscopy were used to investigate the graphitic characteristics of the exfoliated graphenes. ฉ 2010 Published by Elsevier Ltd.
Keywords
Distilled Water, Graphene, Sonication
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