A. G. Ramazanova, V. V. Korolev, O. V. Balmasova, N. A. Fomina
{"title":"On the Physical–Chemical and Magnetic–Thermal Properties of Magnetite Magnetic Fluids with the Addition of Graphene","authors":"A. G. Ramazanova, V. V. Korolev, O. V. Balmasova, N. A. Fomina","doi":"10.1134/s2635167623601109","DOIUrl":null,"url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>In this work, the synthesis of a magnetite/graphene composite and a magnetic fluid based on it is carried out. The physical–chemical and magnetic–thermal properties of the obtained samples are studied. It is established that in the magnetite/graphene composite magnetite nanoparticles are adsorbed on the graphene surface in the form of aggregates. It is found that the specific surface area and pore volume of the magnetite/graphene composite are higher than the values for magnetite. Analysis of the rheological curves of the magnetic fluid characterizes its structure as homogeneous and indicates a uniform distribution of the dispersed phase in the dispersion medium. It is established that the magnetic fluid with the composite is thermally stable up to 210°С. The values of the specific heat capacity of the synthesized sample are slightly higher than the heat capacity of the liquid without graphene additives. It is noted that the addition of an insignificant part of graphene to the magnetic phase of the magnetic fluid leads to a twofold increase in the value of the magnetocaloric effect (MCE) and changes the shape of the temperature dependence of the MCE in the studied temperature range.</p>","PeriodicalId":716,"journal":{"name":"Nanotechnologies in Russia","volume":null,"pages":null},"PeriodicalIF":0.8000,"publicationDate":"2024-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Nanotechnologies in Russia","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1134/s2635167623601109","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"Engineering","Score":null,"Total":0}
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Abstract
In this work, the synthesis of a magnetite/graphene composite and a magnetic fluid based on it is carried out. The physical–chemical and magnetic–thermal properties of the obtained samples are studied. It is established that in the magnetite/graphene composite magnetite nanoparticles are adsorbed on the graphene surface in the form of aggregates. It is found that the specific surface area and pore volume of the magnetite/graphene composite are higher than the values for magnetite. Analysis of the rheological curves of the magnetic fluid characterizes its structure as homogeneous and indicates a uniform distribution of the dispersed phase in the dispersion medium. It is established that the magnetic fluid with the composite is thermally stable up to 210°С. The values of the specific heat capacity of the synthesized sample are slightly higher than the heat capacity of the liquid without graphene additives. It is noted that the addition of an insignificant part of graphene to the magnetic phase of the magnetic fluid leads to a twofold increase in the value of the magnetocaloric effect (MCE) and changes the shape of the temperature dependence of the MCE in the studied temperature range.
期刊介绍：
Nanobiotechnology Reports publishes interdisciplinary research articles on fundamental aspects of the structure and properties of nanoscale objects and nanomaterials, polymeric and bioorganic molecules, and supramolecular and biohybrid complexes, as well as articles that discuss technologies for their preparation and processing, and practical implementation of products, devices, and nature-like systems based on them. The journal publishes original articles and reviews that meet the highest scientific quality standards in the following areas of science and technology studies: self-organizing structures and nanoassemblies; nanostructures, including nanotubes; functional and structural nanomaterials; polymeric, bioorganic, and hybrid nanomaterials; devices and products based on nanomaterials and nanotechnology; nanobiology and genetics, and omics technologies; nanobiomedicine and nanopharmaceutics; nanoelectronics and neuromorphic computing systems; neurocognitive systems and technologies; nanophotonics; natural science methods in a study of cultural heritage items; metrology, standardization, and monitoring in nanotechnology.
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