Preparation of functionalized nanocomposites Fe3O4@SiO2-3-aminopropyltrimethoxysilane and its adsorption to Pb(Ⅱ)

$ 24.50

4.7 (139) In stock

In order to solve the indefects that magnetic nano-Fe3O4 particles were corroded and agglomerated easily, functional modification was carried out. FeCl3 and FeSO4 were used as raw materials and ammonia as preci-pitant in the presence of ultrasonic irradiation, then functionalized by ethyl orthosilicate (TEOS) and 3-aminopropyltrimethoxysilane (APTMS) to prepare SiO2-coated amino-functional nanocomposites Fe3O4@SiO2-APTMS. The magnetic nanocomposites were characterized by TEM, FTIR, VSM, TGA, low temperature nitrogen adsorption and XRD, etc. The characterized results show that the magnetic nanocomposites prepared by ultrasonic strengthening method have the characteristics of strong magnetic response, strong acid and alkali resistance, high dispersion, large specific surface area and small particle size.Meanwhile, the adsorption effects of magnetic nanocomposites for Pb(Ⅱ) were investigated. The results show that the initial pH value of the solution and the dosage of adsorbent have greatest effects on the adsorption effect of Pb(Ⅱ) with the initial pH value of the solution 5.86 and the dosage of adsorbent 1.0-1.5 g·L−1. The Langmuir model is suitable for simulating the isothermal adsorption process, and the adsorption process is a spontaneous process when Gibbs free energy change ∆G0<0. The adsorption behavior of Pb(Ⅱ) can be well described by quasi-second-order kinetics on the composites, Quasi-second-order kinetic constant k2=0.0401 g·mg−1·min−1, equilibrium adsorption capacity qe=80.041 mg·g−1; it is speculated that the adsorption mechanism is mainly complex adsorption and ion exchange.

Preparation of functionalized nanocomposites Fe3O4@SiO2-3- aminopropyltrimethoxysilane and its adsorption to Pb(Ⅱ)

Sustainability, Free Full-Text

Zero-valent iron nanoparticles for environmental Hg (II) removal: a review [PeerJ]

Preparation of amino-functionalized Fe3O4@mSiO2 core-shell magnetic nanoparticles and their application for aqueous Fe3+ removal - ScienceDirect

Preparation of high-capacity magnetic polystyrene sulfonate sodium material based on SI-ATRP method and its adsorption property research for sulfonamide antibiotics, BMC Chemistry

Polymers, Free Full-Text

Novel magnetically separable anhydride-functionalized Fe 3 O 4 @SiO 2 @PEI-NTDA nanoparticles as effective adsorbents: synthesis, stability and recycl - RSC Advances (RSC Publishing) DOI:10.1039/C8RA10310K

Preparation of CMC-coated Fe3O4@SiO2 MNPs

Sustainability, Free Full-Text

Ultrasonic preparation of new nanocomposites poly(GMA)@amino-functionalized Fe3O4: structural, morphological and thermal properties

Sustainability, Free Full-Text

Preparation of functionalized nanocomposites Fe3O4@SiO2-3- aminopropyltrimethoxysilane and its adsorption to Pb(Ⅱ)

Nanomaterials, Free Full-Text

Poly (amidoamine) generation 6 functionalized Fe3O4@SiO2/GPTMS core–shell magnetic NPs as a new adsorbent for Arsenite adsorption: kinetic, isotherm and thermodynamic studies

The Preparation of Fe3O4-MnO2-SiO2-NH2 for Selective Adsorption of Pb(II) in Mixed Solution of Pb(II), Cu(II), and Ni(II)