Core–Shell Fe3O4@C Nanoparticles for the Organic Dye Adsorption and Targeted Magneto-Mechanical Destruction of Ehrlich Ascites Carcinoma Cells

Abstract

The morphology, structure, and magnetic properties of Fe3O4 and Fe3O4@C nanoparticles, as well their effectiveness for organic dye adsorption and targeted destruction of carcinoma cells, were studied. The nanoparticles exhibited a high magnetic saturation value (79.4 and 63.8 emu/g, correspondingly) to facilitate magnetic separation. It has been shown that surface properties play a key role in the adsorption process. Both types of organic dyes—cationic (Rhodomine C) and anionic (Congo Red and Eosine)—were well adsorbed by the Fe3O4 nanoparticles’ surface, and the adsorption process was described by the polymolecular adsorption model with a maximum adsorption capacity of 58, 22, and 14 mg/g for Congo Red, Eosine, and Rhodomine C, correspondingly. In this case, the kinetic data were described well by the pseudo-first-order model. Carbon-coated particles selectively adsorbed only cationic dyes, and the adsorption process for Methylene Blue was described by the Freundlich model, with a maximum adsorption capacity of 14 mg/g. For the case of Rhodomine C, the adsorption isotherm has a polymolecular character with a maximum adsorption capacity of 34 mg/g. To realize the targeted destruction of the carcinoma cells, the Fe3O4@C nanoparticles were functionalized with aptamers, and an experiment on the Ehrlich ascetic carcinoma cells’ destruction was carried out successively using a low-frequency alternating magnetic field. The number of cells destroyed as a result of their interaction with Fe3O4@C nanoparticles in an alternating magnetic field was 27%, compared with the number of naturally dead control cells of 6%.

Speciation of Hexavalent Chromium in Aqueous Solutions Using a Magnetic Silica-Coated Amino-Modified Glycidyl Methacrylate Polymer Nanocomposite

“…Namely, the band at 1060 cm −1 for Si-O-Si stretching, as well as stretching Si-O vibration at 965 cm −1 confirm the presence of silanized magnetite [ 20 ]. The strong peak originating from Fe-O vibrations at ~570 cm −1 confirms the successful incorporation of magnetite nanoparticles [ 35 ]. The characteristic bands for crosslinked methacrylate copolymer at ~2939 cm −1 , ~1456 cm −1 , and ~1389 cm −1 (methyl and methylene stretching and bending vibrations of C-H bond), 1723 cm −1 (C=O stretching vibrations), 1261 cm −1 , and 1153 cm −1 (stretching C-O-C vibrations) also appeared in Fe 3 O 4 @APTMS/PGME-deta spectra [ 36 , 37 ].…”

Biomimetic seaweed absorbable membrane for dye adsorption in wastewater treatment

“…Nanoparticles are one of the most popular and common adsorbent components used in dye adsorption in recent years, which can often achieve an excellent adsorption effect. 42,43 Alternatively, clay and minerals are beneficial for the adsorption of cationic and anionic dyes. 44 Thus, we compared the efficiency of BSAM prepared in this work with the latest materials such as nanoparticles, clay and minerals in dye adsorption.…”

Magnetic Solid Phase Extraction for Determination of Dyes in Food and Water Samples

“…Coating using metallic oxide provides several advantages, such as the prevention of agglomeration and increased stability biocompatibility, and hydrophilicity of MNPs. For example, Fe 3 O 4 @Al 2 O 3 core-shell NPs were more air-stable than the naked Fe 3 O 4 NPs, Fe 3 O 4 @ZnO core-shell NPs were antioxidation and Fe 3 O 4 @CoFe 2 O 4 have more magnetic properties than Fe 3 O 4 NPs [46]. Composite materials were used in MSPE methods, such as Fe 3 O 4 @ZrO 2 @N-cetylpyridinium and [47][48].…”