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1. Facile preparation of amidoxime-functionalized Fe₃O₄@SiO₂-g-PAMAM-AO magnetic composites for enhanced adsorption of Pb(ii) and Ni(ii) from aqueous solution

Author:
Danyang, Liu,   et al.   ; Yimin, Dai; Jiaqi, Zou; Shengyun, Wang; Yi, Zhou;     Show all 5 Authors
Source:
RSC advances 2019 v.9 no.16 pp. 9171-9179
ISSN:
2046-2069
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; adsorbents; adsorption; aqueous solutions; dendrimers; desorption; energy-dispersive X-ray analysis; iron oxides; lead; magnetism; microparticles; models; nickel; pH; scanning electron microscopy; silica; sorption isotherms; temperature; thermogravimetry; transmission electron microscopy
Abstract:
... In this paper, using amidoxime as a functional monomer, different generations of polyamidoxime dendrimer magnetic microspheres (Fe₃O₄@SiO₂-g-PAMAM-AO) were fabricated to adsorb Pb²⁺ and Ni²⁺ in aqueous solution. The magnetic adsorbents were characterized by FTIR, XRD, SEM, XPS, TEM, EDS, TGA and BET. The effects of different factors (such as solution pH, adsorption time, adsorption temperature, ad ...
DOI:
10.1039/c9ra00128j

2. Synthesis of carboxyl-functionalized magnetic nanoparticle for the removal of methylene blue

Author:
Danyang, Liu,   et al.   ; Jiaqi, Zou; Yimin, Dai; Shengyun, Wang; Liling, Zhou; Yi, Zhou;     Show all 6 Authors
Source:
Colloids and surfaces 2019 v.572 pp. 58-66
ISSN:
0927-7757
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; absorption; adsorbents; adsorption; aqueous solutions; carboxylation; chemical structure; colloids; ethylenediamines; kinetics; magnetic materials; magnetism; methylene blue; models; nanoparticles; pH; scanning electron microscopy; silica; sorption isotherms; transmission electron microscopy
Abstract:
... In this paper, carboxylated ethylenediamine functionalization Fe3O4@SiO2 nanoparticles (Fe3O4@SiO2-EDA-COOH NPs) have been developed in order to remove methylene blue (MB) from aqueous solution. The chemical structure, morphology and magnetic characteristics of the magnetic composite nanoparticles were characterized by Fourier transformed infrared spectroscopy (FTIR), X-ray photoelectron spectrosc ...
DOI:
10.1016/j.colsurfa.2019.03.095

3. Preparation of Congo red functionalized Fe3O4@SiO2 nanoparticle and its application for the removal of methylene blue

Author:
Danyang, Liu,   et al.   ; Yimin, Dai; Jiaqi, Zou; Lanli, Niu; Liling, Zhou; Yi, Zhou; Xiaohong, Zhang;     Show all 7 Authors
Source:
Colloids and surfaces 2018 v.550 pp. 90-98
ISSN:
0927-7757
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; adsorbents; adsorption; ambient temperature; aqueous solutions; colloids; electrostatic interactions; hydrogen bonding; kinetics; magnetic fields; methylene blue; nanoparticles; pH; scanning electron microscopy; sorption isotherms; transmission electron microscopy; wastewater
Abstract:
... A novel core-shell structure congo red composite nanoparticle (Fe3O4@SiO2-CR) was synthesized under mild conditions, aiming to remove methylene blue (MB) from aqueous solution. The structure, morphology and magnetic characteristics of the adsorbent Fe3O4@SiO2-CR were investigated by X-ray diffraction (XRD), fourier transformed infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), tran ...
DOI:
10.1016/j.colsurfa.2018.04.033