Comparison of Structure and Magnetic Properties of Ni/C Composites Synthesized from Wheat Straw by Different Methods
| Autor: | Anatoliy Borysiuk, Zenoviy Kohut, Yuriy Kulyk, Krzysztof Chwastek, F. O. Ivashchyshyn, Piotr Chabecki, Ihor Bordun, Dariusz Calus |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Technology
Materials science QH301-705.5 QC1-999 chemistry.chemical_element Nanoparticle nanostructured composite Adsorption nickel chloride General Materials Science Composite material Biology (General) Porosity Instrumentation QD1-999 Fluid Flow and Transfer Processes porous structure Nanocomposite Magnetic moment Process Chemistry and Technology Physics General Engineering Coercivity Magnetic hysteresis Engineering (General). Civil engineering (General) magnetic hysteresis Computer Science Applications Nickel Chemistry chemistry adsorption properties TA1-2040 |
| Zdroj: | Applied Sciences Volume 11 Issue 21 Applied Sciences, Vol 11, Iss 10031, p 10031 (2021) |
| ISSN: | 2076-3417 |
| DOI: | 10.3390/app112110031 |
| Popis: | Synthesis of Ni/C nanostructured composites based on a natural raw material, i.e., wheat straw, is carried out in this work. The synthesis is performed by one- and two-stage methods using NiCl2 as the activating agent. The X-ray diffraction and EDS analyses reveal the presence of metallic nickel in the structure of the composites, whereas magnetic measurements showed that nickel was contained in the porous carbon matrix in the nanoparticle state. For nanocomposites synthesized by the one-stage method, the largest contribution to the formation of the porous structure might be attributed to pores with radii from 5 to 30 nm for a nanocomposite synthesized in two stages, the pore distribution function exhibits a narrow isolated peak with a maximum of around 2.6 nm. Based on the obtained magnetic data, the coercive force, specific saturation magnetization and nickel content in nanocomposites are calculated. For the measured values of the coercive force, the average size of magnetic moment carriers is determined to be ~100 nm for the two-stage synthesis nanocomposite and ~100 ÷ 110 nm for the one-stage synthesis nanocomposites. The developed Ni/C nanocomposites might be used as a cheap material for energy storage applications or as magnetically controlled adsorbents. |
| Databáze: | OpenAIRE |
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