Abstract
Multilayered core–shell Fe3O4-SnO2-C nanoparticles were prepared via surface treatment and carbonization at atmospheric pressure. Fe3O4-SnO2 nanoparticles were prepared by the carboxylation of the pivotal particles (Fe3O4) with an anionic surfactant to immobilize SnO2 nanoparticles. A method was proposed to externally surround hydrophilic carbon with amine-forming materials, polyethyleneimine (PEI), and (3-Aminopropyl) triethoxysilane (APTES). The synthesis strategy was based on the electrostatic bonding of the introduced amine group with the hydroxyl group on the carbon precursor and the carbonization of the coating layer by the catalytic reaction of sulfuric acid.
Highlights
Owing to their unique electrochemical and magnetic properties, magnetite (Fe3 O4 )nanoparticles have gained significant attention for application in various fields, including biomedical fields [1], catalysis [2], resistive switching memory [3], energy storage [4], and electromagnetic interference (EMI) shielding [5]
Among the various materials that are used for forming composites with Fe3 O4, tin dioxide (SnO2 ), an n-type semiconductor with a wide bandgap (Eg = 3.6 eV at 300 K), has been extensively investigated [16]
Owing to its unique characteristics, SnO2 can stabilize the electronic, thermal, and chemical properties of Fe3 O4 through the proximity effect and equilibration of potentials [17,18,19], and various efforts have been made to realize the electrochemical applications of the composites of Fe3 O4 and SnO2
Summary
Owing to their unique electrochemical and magnetic properties, magnetite (Fe3 O4 ). Nanoparticles have gained significant attention for application in various fields, including biomedical fields [1], catalysis [2], resistive switching memory [3], energy storage [4], and electromagnetic interference (EMI) shielding [5] They suffer from low chemical stability and agglomeration owing to their relatively high surface energy [6,7]. Numerous studies have been carried out on the preparation of composites of Fe3 O4 -SnO2 particles with carbon-based materials to improve their conductivity and performance for application in various fields. The mechanism underlying the formation of the core–shell strucstructure the reaction between the polymerized formed by combining glucose, a ture by thebyreaction between the polymerized layer layer formed by combining glucose, a monmonosaccharide-based carbon precursor, and the aminated nanoparticles and sulfuric acid osaccharide-based carbon precursor, and the aminated nanoparticles and sulfuric acid was investigated
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