Synthesis of a graphene oxide/sodium silicate nanocomposite using sodium silicate solution
- Authors
- Choi, Jin Seok; Lee, Hyun-Kwuon; An, Sung Jin
- Issue Date
- 2015
- Publisher
- ROYAL SOC CHEMISTRY
- Citation
- RSC ADVANCES, v.5, no.48, pp.38742 - 38747
- Journal Title
- RSC ADVANCES
- Volume
- 5
- Number
- 48
- Start Page
- 38742
- End Page
- 38747
- URI
- https://scholarworks.bwise.kr/kumoh/handle/2020.sw.kumoh/19180
- DOI
- 10.1039/c5ra05241f
- ISSN
- 2046-2069
- Abstract
- Silicon alkoxide is the typical precursor used in the synthesis of graphene-silica composites; however, it is a toxic and relatively expensive material. Sodium silicate solution, on the other hand, is used industrially as a precursor in sol-gel processes for the production of silica. It is water-soluble and cheaper than silicon alkoxide and may be a suitable replacement in the preparation of graphene-silica composites. Graphene oxide/sodium silicate (G-O/Na2SiO3) sols were prepared from different concentrations of sodium silicate solutions and the pH of the sols was varied using HCl. The most stable G-O/Na2SiO3 sol was formed at pH 11, using 0.1 g of sodium silicate solution. We confirmed that the rG-O/Na2SiO3 nanocomposite contains particles with irregular shapes and sizes of a few hundred nanometers. The rG-O/Na2SiO3 nanocomposite also exhibited the highest electrical conductivity of 35.4 S cm(-1).
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Collections - Department of Materials Science and Engineering > 1. Journal Articles
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