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20240119173608.0 |
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240116|2023 enk s a eng d |
| 024 |
7 |
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|a 10.1016/j.carbon.2023.01.062
|2 doi
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|a koha001017256
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|a RU-ToGU
|b rus
|c RU-ToGU
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|a Effects of green solvents and surfactants on the characteristics of few-layer graphene produced by dual-frequency ultrasonic liquid phase exfoliation technique
|c A. V. Tyurnina, J. A. Morton, A. Kaur [et al.]
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|a Текст
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|a электронный
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|a Библиогр.: 61 назв.
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|a Nowadays, one of the promising methods for scalable graphene production is ultrasound-aided liquid phase exfoliation (ULPE) of graphite. Two current limiting factors of ULPE are the use of harmful solutions (such as NMethyl-2-pyrrolidone or Dimethylformamide) and a relatively low graphene yield. In this study, we demonstrate a new dual frequency (20 kHz and 1174 kHz) ULPE approach in various eco-friendly media, which enabled us to produce various few-layer graphene (FLG) solutions of high quality. By implementing sophisticated characterisation techniques consisting of Raman spectroscopy, UV–vis spectroscopy and high-resolution electron microscopy, the final graphene flakes structure was confirmed to correlate the properties of each individual solution. The thinner (~3 layers) and larger (~1.5 μm2) flakes were observed while using just water, with the highest yield (11%) of smaller FLG flakes to be achieved in the mixture of water and a surfactant. In order to understand the cavitation mechanism in different solutions, the ULPE process was investigated by acoustic measurements. This study demonstrates the crucial role of ethanol (as a solvent) and surfactants as it regulates the cavitation power and intensity of the ultrasonic field and, thereby, the cavitation effectiveness. It is suggested that the mixture of water, ethanol and a surfactant is the best medium for ULPE process where a high yield of low-defective FLG flakes can be obtained in a solution stable at least for 3 months (around 80%)
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|a графен
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|a акустическое давление
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|a ультразвуковой пилинг
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|a экологичные решения
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|a ударные волны
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| 655 |
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4 |
|a статьи в журналах
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1 |
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|a Tyurnina, Anastasia V.
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1 |
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|a Morton, Justin A.
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1 |
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|a Kaur, Amanpreet
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| 700 |
1 |
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|a Mi, Jiawei
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1 |
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|a Grobert, Nicole
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|a Porfyrakis, Kyriakos
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1 |
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|a Tzanakis, Iakovos
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| 700 |
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|a Eskin, Dmitry G.
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| 773 |
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|t Carbon
|d 2023
|g Vol. 206. P. 7-15
|x 0008-6223
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| 852 |
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|a RU-ToGU
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| 856 |
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|u http://vital.lib.tsu.ru/vital/access/manager/Repository/koha:001017256
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|a статья
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|c 1017256
|d 1017256
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