Preparation of Fe3O4-C18 nano-magnetic composite materials and their cleanup properties for organophosphorous pesticides

Abstract

Magnetic Fe3O4-C18 composite nanoparticles of approximately 5-10 nm in size were synthesized and characterized by IR spectroscopy, atomic absorption spectroscopy, X-ray diffraction, and transmission electron microscopy. The magnetic Fe3O4-C18 composite nanoparticles were applied for cleanup and enrichment of organophosphorous pesticides. Comparative studies were carried out between magnetic Fe3O4-C18 composite nanoparticles and common C18 materials. Residues of organophosphorous pesticides were determined by gas chromatography in combination with a nitrogen/phosphorus detector. The cleanup and enrichment properties of magnetic Fe3O4-C18 composite nanoparticles are comparable with those of common C18 materials for enrichment of organophosphorous pesticides, but the cleanup and enrichment are faster and easier to perform.

Barium alginate caged Fe3O4@C18 magnetic nanoparticles for the pre-concentration of polycyclic aromatic hydrocarbons and phthalate esters from environmental water samples

“…As shown in Fig. 4(b), after Fe 3 O 4 nanoparticles are functionalized with C 18 , the stretching vibration of hydroxyl groups disappears, while a C-H stretching vibrating band at 2920 and 2850 cm −1 arises [13]. This indicates that the C 18 chain is successfully attached to the magnetic nanoparticles by reactions with the hydroxyl groups on the surface of Fe 3 O 4 .…”

“…In recent years, a few researchers have studied the application of alkoxysilanes modified magnetic nanoparticles in bioseparations and purification [13][14][15]. Bruce and Sen have prepared aminopropyl modified magnetite/silica core-shell nanoparticles, and investigated the efficiency of this material in the capture of single-stranded nucleic acids [14].…”

Preparation of a chitosan-coated C18-functionalized magnetite nanoparticle sorbent for extraction of phthalate ester compounds from environmental water samples

“…S3, spectrum c). The peaks around 3,420 cm −1 in curves a-c related to the -OH group, and the peak at 564 cm −1 corresponds to an Fe-O group [27]. After modification with octadecyltriethoxysilane, characteristic bands of saturated C-H absorption at 2,851 and 2,921 cm −1 and of O-Si-C absorption at 1,623 cm −1 appeared [27] (Fig.…”

Nanomaterial and their applications in Environmental sample preparation techniques: A Review

“…Zhao et al prepared cetyltrimethylammonium bromide (CTAB)-coated Fe3O4 NPs for the preconcentration of bisphenol A, 4-tert-octylphenol and 4-n-nonylphenol in the presence of CTAB [90][91] . CTAB molecules were self-assembled on the surface of Fe3O4 NPs through electrostatic interaction between the head group of CTAB and the oppositely charged group on the Fe3O4 NPs.…”