A facile route for the synthesis of mesoporous melamine-formaldehyde resins for hexavalent chromium removal

Lv, Zhen; Liang, Changsheng; Cui, Jiayang; Zhang, Yanan; Xu, Shiai

doi:10.1039/c4ra16866f

Cited by 43 publications

(22 citation statements)

References 62 publications

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“…The SEM image (Figure b) revealed that MMF@Fe 3 O 4 had a uniform distribution, while no large‐size Fe 3 O 4 particles were detected, suggesting a complete inclusion of Fe 3 O 4 particles in the MMF@Fe 3 O 4 composite. The nitrogen sorption isotherm of MMF@Fe 3 O 4 (Figure c) exhibited a typical type IV curve with a hysteresis loop at a relative pressure of 0.40–0.90, which confirmed the presence of mesoporosity in MMF@Fe 3 O 4 . As shown in Figure d, the pore size of MMF@Fe 3 O 4 revealed a broad range from 2 to 25 nm and centered at 5.84 nm, which was calculated using the Barrett–Joyner–Halenda method.…”

Section: Resultsmentioning

confidence: 99%

“…MF contains abundant nitrogen atoms, which can well coordinate with transition metals . However, studies of enrichment and detection of metal ions using MF are scarce . Lv et al designed and synthesized magnetic mesoporous MF nanoparticles to adsorb Cr(VI), which showed high adsorption capacity and selectivity.…”

Section: Introductionmentioning

confidence: 99%

“…[20][21][22] However, studies of enrichment and detection of metal ions using MF are scarce. [23,24] Lv et al [25] designed and synthesized magnetic mesoporous MF nanoparticles to adsorb Cr(VI), which showed high adsorption capacity and selectivity. However, the synthesis procedure is complicated and requires high temperature (150°C) and long reaction time (24 h).…”

Section: Introductionmentioning

confidence: 99%

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Design and preparation of magnetic mesoporous melamine–formaldehyde resin: A novel material for pre‐concentration and determination of silver

Zhao

Yang

et al. 2019

Applied Organom Chemis

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Using commercially available melamine and formaldehyde as the starting materials, a magnetic mesoporous melamine–formaldehyde resin (MMF@Fe3O4) possessing large surface area was prepared via a simple method and could be used as an efficient adsorbent for magnetic solid‐phase extraction. Compared with the traditional synthetic methods of MMF@Fe3O4, this approach is easily operated under mild conditions, is time‐saving and environmentally friendly, and can produce the material in high yields. The as‐prepared MMF@Fe3O4 possesses good adsorption capacity and selectivity for silver ions. The affecting factors such as pH, amount of MMF@Fe3O4, extraction time, desorption solvent, eluent concentration and sample volume were systematically investigated and optimized. Under the optimized conditions, the material exhibited a good response to silver ions at concentrations in the range 2.0–200 μg l−1 with good linearity (r2 = 0.9982), while the limit of detection was found to be 0.12 μg l−1. The material was successfully applied to the determination of silver in a variety of water samples.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Design and preparation of magnetic mesoporous melamine–formaldehyde resin: A novel material for pre‐concentration and determination of silver

Zhao

Yang

et al. 2019

Applied Organom Chemis

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“…[4,9] This kind of pollution has become an epidemic problem so the removal of HMIs is a major issue in world. [10] To date, several approaches were applied to remove the HMIs from water including nanofiltration, membrane separation, ion exchange, [11,12] resin, [13] photocatalytic degradation, [14] chemical moisture, membrane filtration, freezing, chemical deposition, biological treatment, reverse osmosis, adsorption, etc. [15][16][17][18][19][20] Adsorption is one of the best treatment methods because it does not require high temperatures, as well as several substances, that can be captured at the same time.…”

Section: Introductionmentioning

confidence: 99%

Recent Progress in the Removal of Heavy Metal Ions from Water Using Metal‐Organic Frameworks

2020

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The efficient adsorption of heavy metal ions from wastewater has become a serious challenge from both environmental and biological viewpoints. Recently, porous metal‐organic frameworks (MOFs), with metallic clusters and organic linkers, have been developed as promising structures in the capture of different toxic and hazardous substances, including heavy metal ions, because of their unique features. Here there is a collection for recent progress in the field of water remediation from the variable‐valent metals in polluted water and the corresponding MOFs which are able to remove these pollutant agents from water. Meanwhile, effective factors in the absorption of metal ions are discussed. MOFs are considered to be a promising candidate for metal ions removal from wastewater.

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“…Metal-organic frameworks based on Cu-benzenetricarboxylates have been used for the adsorption of Cr(VI) from aqueous solution, whose maximum adsorption capacity was 48 mg g À1 . 8 BaTiO 3 @SBA-15 nanocomposite was used as an adsorbent for the removal of Cr(VI)-contaminated water and it showed an adsorption capacity of 98.2 wt% within only 40 min contact time in a batch reactor. 7 A highly mesoporous melamine-formaldehyde resin showed enhanced adsorption capacity (66.65 mg g À1 ) and selectivity for Cr(VI).…”

Section: Introductionmentioning

confidence: 99%

The efficient adsorption removal of Cr(vi) by using Fe₃O₄ nanoparticles hybridized with carbonaceous materials

Gao

Dou

et al. 2015

RSC Adv.

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Fe 3 O 4 nanoparticles hybridized with carbonaceous materials, such as pinecone and graphene, were successfully synthesized by a facile hydrothermal method, which could be applied for Cr(VI) removal in aqueous solution. The nanocomposites were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and N 2 adsorption-desorption isotherms. Due to the combination of pinecone and graphene, both the surface properties and morphologies of Fe 3 O 4 were modified. Fe 3 O 4 spherical particles were distributed and firmly anchored on the loose surface of pinecone or wrinkled graphene layers. The specific surface area increased from 23.85 to 27.86 and 121.17 m 2 g À1 for Fe 3 O 4 /P and Fe 3 O 4 / G, respectively. It enhanced the adsorption capacity for Cr(VI) of Fe 3 O 4 /P (62.5 mg g À1 ) and Fe 3 O 4 /G (78.5 mg g À1 ). Study of the kinetics and isotherms showed that the pseudo-second-order kinetic and Langmuir isotherm models fitted the adsorption data well. There were three steps in the adsorption process, namely an instantaneous adsorption step, intraparticle diffusion and a final equilibrium stage. The reaction rate decreased along with temperature increasing, which indicated that Cr(VI) adsorption was an exothermic process. The E a values were 34.39, 25.77 and 34.92 kJ mol À1 for Fe 3 O 4 , Fe 3 O 4 /P and Fe 3 O 4 /G, respectively, which illustrated that the adsorption of Cr(VI) onto the surface of the nanocomposites was a physical process. In no more than 5 h, about 92.6% and 94% Cr(VI) were desorbed from the surface of Fe 3 O 4 /P and Fe 3 O 4 /G, respectively, which indicated that the adsorptiondesorption process for Cr(VI) was reversible. The results demonstrated that Fe 3 O 4 /P and Fe 3 O 4 /G

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A facile route for the synthesis of mesoporous melamine-formaldehyde resins for hexavalent chromium removal

Abstract: A facile route for the synthesis of mesoporous melamine-formaldehyde resins (MMF) for hexavalent chromium removal.

Cited by 43 publications

References 62 publications

Design and preparation of magnetic mesoporous melamine–formaldehyde resin: A novel material for pre‐concentration and determination of silver

Design and preparation of magnetic mesoporous melamine–formaldehyde resin: A novel material for pre‐concentration and determination of silver

Recent Progress in the Removal of Heavy Metal Ions from Water Using Metal‐Organic Frameworks

The efficient adsorption removal of Cr(vi) by using Fe₃O₄ nanoparticles hybridized with carbonaceous materials

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A facile route for the synthesis of mesoporous melamine-formaldehyde resins for hexavalent chromium removal

Abstract: A facile route for the synthesis of mesoporous melamine-formaldehyde resins (MMF) for hexavalent chromium removal.

Cited by 43 publications

References 62 publications

Design and preparation of magnetic mesoporous melamine–formaldehyde resin: A novel material for pre‐concentration and determination of silver

Design and preparation of magnetic mesoporous melamine–formaldehyde resin: A novel material for pre‐concentration and determination of silver

Recent Progress in the Removal of Heavy Metal Ions from Water Using Metal‐Organic Frameworks

The efficient adsorption removal of Cr(vi) by using Fe3O4 nanoparticles hybridized with carbonaceous materials

Contact Info

Product

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The efficient adsorption removal of Cr(vi) by using Fe₃O₄ nanoparticles hybridized with carbonaceous materials