Aryl fluoride functionalized graphene oxides for excellent room temperature ammonia sensitivity/selectivity
| Autor: | M. Sterlin Leo Hudson, Samuthira Nagarajan, M. Jeyavelan, Keisuke Takahashi, Farheen Khurshid |
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| Rok vydání: | 2018 |
| Předmět: |
Graphene
General Chemical Engineering Aryl Inorganic chemistry Oxide 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences law.invention Ammonia chemistry.chemical_compound symbols.namesake chemistry law symbols Moiety Azide 0210 nano-technology Selectivity Raman spectroscopy |
| Zdroj: | RSC Advances. 8:20440-20449 |
| ISSN: | 2046-2069 |
| DOI: | 10.1039/c8ra01818a |
| Popis: | Herein, we report the covalent functionalization of graphene oxide (GO) through ''click'' reaction and its applications towards ammonia sensing. This inimitable method of covalent functionalization involves linking GO with azide moiety and click coupling of different derivatives of aryl propargyl ether, which enhances the sensitivity towards ammonia. The functionalized GO were characterized using NMR, XRD, SEM, FT-IR, Raman, UV-Vis, TGA and DSC. Compared to pristine GO, the GO functionalized with Ar samples (GO-Ar) exhibit excellent room temperature ammonia sensing properties with good response/recovery characteristics. It has been observed that 2,3-difluoro and 2,3,4-trifluoro substituted aryl propargyl ether functionalized GO (GO-Ar2 and GO-Ar3) shows superior ammonia sensing with response/recovery of 63%/∼90% and 60%/100%, respectively at 20 ppm. The GO-Ar3 exhibits high sensitivity towards ammonia at 20-100 ppm. Computational studies supports the high sensitivity of GO-Ar towards ammonia due to its high adsorption energy. |
| Databáze: | OpenAIRE |
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