Abstract
Magnetic nanoparticles were used at various engineering applications such as catalysis for chemical reactions, electronic applications, biomedical applications (cancer detection and therapy), waste water treatment and oil spill cleaning [1,2]. Although, many papers were published about graphene encapsulated Fe nanoparticles, there are a few studies about the synthesis of graphene encapsulated nanoparticles with bimetallic core compositions. Cui et al. [3] synthesized the graphene encapsulated core/shell nanoparticles with binary metal (Fe/Co and Fe/Ni) core compositions. Farooq et al. [4] synthesized Fe-Cu/reduced graphene oxide (rGO) nanoparticles to use as catalysis for possible catalytic applications. Herein, 1.25 g of Iron(III) chloride hexahydrate (FeCl3.6H2O) salts and 1.25 g of Copper(II) acetate hydrate (Cu(CO2CH3)2xH2O) salts were mixed with 6.25 g of fumed silica powders (Evonik Aerosil 380). These powder mixtures were solved into ethanol (C2H5OH, Merck, % 96) using stirrer and prepared solution were heated and stirred to prepare precursor powders. Silica impregnated Fe and Cu-salts based precursors were filled into quartz boats to locate chemical vapor deposition (CVD) system. CVD temperature, time and gas flows were changed to detect optimum CVD parameters. 900 and 950°C were selected as CVD temperatures. Also, holding time these temperatures are 60 min and outlet pressure of system is 50 mbar. The other parameters are flow rates of methane (CH4) and hydrogen (H2) gases. 50 ml/min and 100 ml/min flow rates for methane gas that used as carbon source were preferred for different CVD studies. Synthesized particles via CVD were purified using 2 M hydrofloric acid (HF) and 4 M hydrochloric acid (HCl) leaching to remove remained SiO2 phase and uncoated Fe/Cu nanoparticles. Purified powders were characterized X-Ray diffractometer (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM), Raman spectroscopy and differential thermal analysis (DTA)/thermogravimetric analysis (TG) and vibrating sample magnetometer (VSM). Based on the XRD analysis, after the CVD Fe, Cu and C (graphite) phases were detected and also after leaching steps same phases were detected after leaching steps. Transmission electron microscope (TEM) images showthe graphene encapsulated morphologies. Additionally, hysteresis loops enabled from VSM measurements show the synthesized nanoparticles have soft magnetic properties. Therefore, they might be a candidate material for different biomedical applications.
Original language | English |
---|---|
Title of host publication | Proceedings of the 9th World Congress on Mechanical, Chemical, and Material Engineering, MCM 2023 |
Editors | Huihe Qiu, Yuwen Zhang, Marcello Iasiello |
Publisher | Avestia Publishing |
ISBN (Print) | 9781990800276 |
DOIs | |
Publication status | Published - 2023 |
Event | 9th World Congress on Mechanical, Chemical, and Material Engineering, MCM 2023 - London, United Kingdom Duration: 6 Aug 2023 → 8 Aug 2023 |
Publication series
Name | Proceedings of the World Congress on Mechanical, Chemical, and Material Engineering |
---|---|
ISSN (Electronic) | 2369-8136 |
Conference
Conference | 9th World Congress on Mechanical, Chemical, and Material Engineering, MCM 2023 |
---|---|
Country/Territory | United Kingdom |
City | London |
Period | 6/08/23 → 8/08/23 |
Bibliographical note
Publisher Copyright:© 2023, Avestia Publishing. All rights reserved.