Abstract
A simple cocasting method has been developed to prepare magnetic mesoporous FePt/C composites with superparamagnetic FePt nanoparticles embedded in carbon walls. Furfuryl alcohol, iron(III) acetylacetonate (Fe(acac)3), and platinum(II) acetylacetonate (Pt(acac)2) were used as the carbon and FePt nanoparticle precursors to be simultaneously incorporated into the channels of mesoporous silica SBA-15 template by the incipient wetness impregnation technique. After the polymerization of furfuryl alcohol, the carbonization in argon, and the removal of silica template, magnetic mesoporous FePt/C composites were finally obtained. Magnetic mesoporous FePt/C composites have high surface area of 1244 m2/g and narrow mesopore size distribution peaked at 4.93 nm. FePt nanoparticles were well embedded in mesoporous carbon walls, and mesoporous FePt/C composites exhibit superparamagnetic behavior. Using cytochrome c (Cyt c), myoglobin (Mb), and bovine serum albumin (BSA) as model proteins, the adsorption capacities of Cyt c, Mb, and BSA on magnetic mesoporous FePt/C composites can reach ca. 200, 162, and 121 μg/mg, respectively. These results indicated that mesoporous FePt/C composites have potential as magnetically separable adsorbent for biomolecules separation.
Highlights
Ordered mesoporous carbon (OMC) materials are of great interest due to their uniform pore structure, high surface area, thermal stability, electrical conductivity, chemical inertness, biocompatibility, and speci c surface properties [1, 2]
A er the calcination to remove the surfactant template from SBA-15, furfuryl alcohol, Fe(acac)3, Pt(acac)2, and a small quantity of oxalic acid were introduced into the mesoporous channels of SBA-15 by wetness impregnation technique
During polymerization of furfuryl alcohol, Fe(acac)3 and Pt(acac)2 were embedded in the framework of polyfurfuryl alcohol. en, polyfurfuryl alcohol was carbonized under Ar atmosphere at 700∘C to convert into compact carbon, and Fe(acac)3 and Pt(acac)2 were decomposed and in situ carbothermally reduced to magnetic alloy FePt nanoparticles accompanying the carbonization process
Summary
Ordered mesoporous carbon (OMC) materials are of great interest due to their uniform pore structure, high surface area, thermal stability, electrical conductivity, chemical inertness, biocompatibility, and speci c surface properties [1, 2]. Wang et al impregnated simultaneously furfuryl alcohol and metal nitrates (carbon and magnetic particle precursors) into mesoporous silica SBA-15, followed by polymerization, carbonization, and the removal of silica framework to obtain magnetic mesoporous FeNi/C composites [18]. Our group has developed a nanocasting route to prepare magnetic OMC materials with FePt nanoparticles, involving the polymerization of the impregnated furfuryl alcohol in the channels of mesoporous silica KIT-6, the repeated wetness impregnation of FePt precursors (Fe(acac) and Pt(acac)2), the carbonization in argon, and the removal of mesoporous silica templates [26]. Fe(acac), and Pt(acac) were simultaneously incorporated into SBA-15 by the wetness impregnation technique, following the polymerization of furfuryl alcohol, the carbonization in argon, and the removal of silica template, magnetic mesoporous FePt/C composites were obtained. Using Cyt c, Mb, and BSA as model proteins, the adsorption properties of magnetic mesoporous FePt/C composites were investigated
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
