2022-Sustainable Industrial Processing Summit
SIPS2022 Volume 18 Intl. Symp on Advanced Materials, Polymers, Composite, Nanomaterials, Nanotechnologies and Manufacturing
| Editors: | F. Kongoli, F. Marquis, N. Chikhradze, T. Prikhna, M. De Campos, S. Lewis, S. Miller, S. Thomas. |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2022 |
| Pages: | 290 pages |
| ISBN: | 978-1-989820-68-1(CD) |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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Different Types of Graphene Materials and Their Composites with Polyindole as Methanol Vapor Sensing Materials
Katesara Phasuksom1; Phimchanok Sakunpongpitiporn1; Natlita Thummarungsan1; Kornkanok Rotjanasuworapong1; Anuvat Sirivat1;1CHULALONGKORN UNIVERSITY, Bangkok, Thailand;
Type of Paper: Regular
Id Paper: 171
Topic: 62
Abstract:
Gas sensing materials fabricated from graphene based materials have been shown to provide good sensing properties: high surface area providing low limit of detection; facilitating gas interaction owing to the oxygen species functionalized on their structure promoting energy and gas adsorptions [1]. Different types of graphene materials namely; the commercial graphene (cm-G), the commercial graphene oxide (cm-GO), reduced graphene oxide (rGO), and the synthesized graphene oxide (OIHM-GO), and their composites with polyindole (PIn) were used as methanol sensing materials. The synthesized graphene oxide was synthesized by the optimized improved Hummers method because of its non-toxic method, fast preparation and low cost [2]. Herein, the synthesized GO was called OIHM-GO. The reduced graphene oxide was prepared by two different methods, the thermally mild reduction at 120˚C to yield the in situ T-rGO and the chemically reduction by ascorbic acid to yield the in situ C-rGO, in which the cm-GO was used as a raw material.
The different types of graphene materials presented different behavior responses toward methanol. The hydrophilicity of graphene materials related to oxygen content was the key factor for the methanol response.
The sensing responses were evaluated from the relative electrical conductivity at room temperature by a custom-built two point probe.
The element content of materials was clarified by X-ray photoelectron spectroscopy in which GO showed a higher oxygen content than rGO, and G, respectively. The functional groups were also confirmed by Fourier-transform infrared spectroscopy. The morphology was checked by Emission Scanning Electron Microscope.
Keywords:
Polymerization;References:
[1] Y. Peng and J. Li, Frontiers of Environmental Science & Engineering 7 (2013) 403-411.[2] M. P. Lavin-Lopez, A. Romero, J. Garrido, L. Sanchez-Silva, and J. L. Valverde, Industrial & Engineering Chemistry Research 55 (2016) 12836-12847.