Graphene Encapsulated Bimetallic Fe-Cu Nanoparticles: Synthesis, Purification and Characterization

Sıddıka Mertdinç-ülküseven, Zara Cherkezova-Zheleva, Özge Balcı-çağıran, Hristo Kolev, Daniela Paneva, M. Lütfi Öveçoğlu, Duygu Ağaoğulları

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

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 languageEnglish
Title of host publicationProceedings of the 9th World Congress on Mechanical, Chemical, and Material Engineering, MCM 2023
EditorsHuihe Qiu, Yuwen Zhang, Marcello Iasiello
PublisherAvestia Publishing
ISBN (Print)9781990800276
DOIs
Publication statusPublished - 2023
Event9th World Congress on Mechanical, Chemical, and Material Engineering, MCM 2023 - London, United Kingdom
Duration: 6 Aug 20238 Aug 2023

Publication series

NameProceedings of the World Congress on Mechanical, Chemical, and Material Engineering
ISSN (Electronic)2369-8136

Conference

Conference9th World Congress on Mechanical, Chemical, and Material Engineering, MCM 2023
Country/TerritoryUnited Kingdom
CityLondon
Period6/08/238/08/23

Bibliographical note

Publisher Copyright:
© 2023, Avestia Publishing. All rights reserved.

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