Abstract
In this article the synthesis of Fe3O4@MCM-41@NH-2,6-pydc as good adsorbent with potential of many applications, by coprecipitation method, was reported. For this purpose, Fe3O4 was synthesized, then protected with MCM-41 as a shell. Afterward, Fe3O4@MCM-41 functionalized by 2,6-pyridine dicarboxylic acid (pydc) after modifying by 3-aminopropyl trimethoxysilane (APTMS). This adsorbent characterized by means of X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), energy dispersive X-ray (EDX), scanning electron microscope (SEM), Brunauer–Emmett–Teller (BET), differential thermal analysis (DTA), thermogravimetric analyses (TGA) and derivative thermogravimetric (DTG). The vibrating sample magnetometer (VSM) has been used to investigate its magnetic properties.
Highlights
Magnetic nanoparticles and their functionalized, attract plenty attention through their markable usages in different field such as biotechnology [1], metal ion extraction [2], carriers for targeted drug delivery [3], optical imaging [4], electronic [5], magneto resistance [6] and catalyst [7]
To recognition the crystalline structure of the synthesized nanoparticles, it was analyzed by X-ray diffraction from 0° (2θ) to 80° (2θ) (Fig. 2)
These results revealed that the initial crystallographic structure of Fe3O4, was preserved perfectly during the surface modification process
Summary
Magnetic nanoparticles and their functionalized, attract plenty attention through their markable usages in different field such as biotechnology [1], metal ion extraction [2], carriers for targeted drug delivery [3], optical imaging [4], electronic [5], magneto resistance [6] and catalyst [7]. In which magnetic nanoparticles are present, specially for Fe3O4 nanoparticles have individual, features including superparamagnetism, high surface area, large surface-tovolume ratio, facile separation by external magnetic fields [3, 8,9,10]. Due to their good biocompatibility and low toxicity, Fe3O4 nanoparticles are the most preferable [1114]. The hydrolysis and condensation of silica precursors, as an example tetraethylorthosilicate (TEOS) forms a solid silicate mesostructure around the template because of electrostatic interactions between the negatively charged silica species and head groups of the surfactant, or by hydrogen bonding interactions. The hydrolysis and condensation of silica precursors, as an example tetraethylorthosilicate (TEOS) forms a solid silicate mesostructure around the template because of electrostatic interactions between the negatively charged silica species and head groups of the surfactant, or by hydrogen bonding interactions. the template is removed by calcination after formation of the silicate mesostructure [18]
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