Amino-functionalized core-shell magnetic mesoporous composite microspheres for Pb(II) and Cd(II) removal

Tang, Yongchun; Liang, Song; Wang, Juntao; Yu, Shuili; Wang, Yilong

doi:10.1016/s1001-0742(12)60141-7

Cited by 68 publications

(16 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Emadi and Shams [24] functionalized magnetite/silica nanoparticles by immobilization with thiadiazole derivatives for heavy metal removal applications. Tang et al [25] reported the preparation of amino-functionalized magnetic composite microspheres for the removal of Pb(II) and Cd(II).…”

Section: Introductionmentioning

confidence: 99%

Simple and facile synthesis of amino functionalized hollow core–mesoporous shell silica spheres using anionic surfactant for Pb(II), Cd(II), and Zn(II) adsorption and recovery

El‐Toni

Habila

Ibrahim

et al. 2014

Chemical Engineering Journal

101

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

Simple and facile synthesis of amino functionalized hollow core–mesoporous shell silica spheres using anionic surfactant for Pb(II), Cd(II), and Zn(II) adsorption and recovery

El‐Toni

Habila

Ibrahim

et al. 2014

Chemical Engineering Journal

101

View full text Add to dashboard Cite

“…Indeed, the removal of toxic heavy metal ions and organic pollutants from wastewater is a crucial goal of green chemistry today. Various organo-functionalized core-shell Mag-MSNs containing thiols, [35] carboxyl [151] and amino groups [152] have been reported for metal ion removal and dye adsorption. Moreover, these core-shell Mag-MSNs are magnetic and can be easily separated from the aqueous system by an external magnetic field, thereby realizing recycling, which can greatly reduce the cost.…”

Section: Applications For Wastewater Treatmentmentioning

confidence: 99%

Recent Advances in the Synthesis, Surface Modifications and Applications of Core‐Shell Magnetic Mesoporous Silica Nanospheres

Zuo

et al. 2020

Chemistry An Asian Journal

View full text Add to dashboard Cite

The hierarchically structured core-shell magnetic mesoporous silica nanospheres (Mag-MSNs) have attracted extensive attention, particularly in studies involving reliable preparations and diverse applications of the multifunctional nanomaterials in multi-disciplinary fields. Intriguingly, Mag-MSNs have been prepared with well-designed synthesis strategies and used as adsorbent materials, biomedicines, and in proteomics and catalysis due to their excellent magnetic responsiveness, enormous specific surface area and readiness for surface modifications. Through a carefully designed surface modification of Mag-MSNs, the performance and application prospects of the material are greatly improved. Typically, the introduction of various molecular matrices into the shell of Mag-MSNs facilitates the combination of surface modifications and magnetic separation technology. So far, as sustainable chemistry is concerned, it is important to recover the functionalized core-shell Mag-MSNs after the reaction and reuse them without losing activity. In this review, the design conceptions and the construction of core-shell Mag-MSNs are discussed. Furthermore, various surface modification approaches of core-shell Mag-MSNs are summarized, and recent applications of these functionalized nanomaterials in the fields of biomedicine, catalysis, proteomics and wastewater treatment are exemplified. 2 3 4 5 6 7 8

show abstract

“…Tang et al (2012) synthesized Fe 3 O 4 @mesoporous silica composite microspheres (MS) and polyethylenimine(PEI) functionalization of Fe 3 O 4 @mesoporous silica composite microspheres by solvothermal reaction for humic acid adsorption [ 29 ], where the silica shell acted as a protective coating and PEI was the surface functional moiety. Tang et al (2013) prepared amino-functionalized Fe 3 O 4 @mesoporous SiO 2 core-shell composite microspheres for Pb(II) and Cd(II) adsorption and silica worked as a protective layer with immobilized amino groups to chelate heavy metal cations [ 30 ]. However, most of these reports implemented two-step synthesis processes where in the first step was to develop a protective coating layer and the second was to impart a functional group.…”

Section: Introductionmentioning

confidence: 99%

One-Step Carbon Coating and Polyacrylamide Functionalization of Fe3O4 Nanoparticles for Enhancing Magnetic Adsorptive-Remediation of Heavy Metals

et al. 2017

View full text Add to dashboard Cite

Magnetic nanoparticles are used in adsorptive removal of heavy metals from polluted wastewater. However, their poor stability in an acidic medium necessitates their protection with a coating layer. Coating magnetic nanoparticles with carbon showed proper protection but the heavy metal removal efficiency was slightly weak. However, to boost the removal efficiencies of surface functionalization, polyacrylamide was applied to carbon-coated Fe3O4 nanoparticles. In this paper, to facilitate the synthesis process, one-step carbon coating and polyacrylamide functionalization were conducted using the hydrothermal technique with the aim of enhancing the adsorptive removal capacity of Fe3O4 nanoparticles towards some heavy metals such as Cu(II), Ni(II), Co(II), and Cd(II). The results showed that the one-step process succeeded in developing a carbon coating layer and polyacrylamide functionality on Fe3O4 nanoparticles. The stability of the magnetic Fe3O4 nanoparticles as an adsorbent in an acidic medium was improved due to its resistance to the dissolution that was gained during carbon coating and surface functionalization with polyacrylamide. The adsorptive removal process was investigated in relation to various parameters such as pH, time of contact, metal ion concentrations, adsorbent dose, and temperature. The polyacrylamide functionalized Fe3O4 showed an improvement in the adsorption capacity as compared with the unfunctionalized one. The conditions for superior adsorption were obtained at pH 6; time of contact, 90 min; metal solution concentration, 200 mg/L; adsorbent dose, 0.3 g/L. The modeling of the adsorption data was found to be consistent with the pseudo-second-order kinetic model, which suggests a fast adsorption process. However, the equilibrium data modeling was consistent with both the Langmuir and Freundlich isotherms. Furthermore, the thermodynamic parameters of the adsorptive removal process, including ΔG°, ΔH°, and ΔS°, indicated a spontaneous and endothermic sorption process. The developed adsorbent can be utilized further for industrial-based applications.

show abstract

Amino-functionalized core-shell magnetic mesoporous composite microspheres for Pb(II) and Cd(II) removal

Cited by 68 publications

References 26 publications

Simple and facile synthesis of amino functionalized hollow core–mesoporous shell silica spheres using anionic surfactant for Pb(II), Cd(II), and Zn(II) adsorption and recovery

Simple and facile synthesis of amino functionalized hollow core–mesoporous shell silica spheres using anionic surfactant for Pb(II), Cd(II), and Zn(II) adsorption and recovery

Recent Advances in the Synthesis, Surface Modifications and Applications of Core‐Shell Magnetic Mesoporous Silica Nanospheres

One-Step Carbon Coating and Polyacrylamide Functionalization of Fe3O4 Nanoparticles for Enhancing Magnetic Adsorptive-Remediation of Heavy Metals

Contact Info

Product

Resources

About