Polypyrrole modified magnetic reduced graphene oxide composites: synthesis, characterization and application for selective lead adsorption

Liu, Zhanmeng; Gao, Zhimin; Xu, Lichun; Hu, Fengping

doi:10.1039/d0ra01546f

Cited by 15 publications

(6 citation statements)

References 44 publications

(45 reference statements)

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“…Reduced graphene oxide (rGO) was used as a support for magnetic iron oxide (Fe 3 O 4 ) nanoparticles (average size,~200 nm) enveloped in polypyrrole by Hu et al [99] who used an in situ polymerization of a mixture of polyvinylpyrrolidone and pyrrole monomer around presynthesized Fe 3 O 4 /rGO. This composite material has a much lower magnetic response, but still can be mostly withdrawn from suspension in water using a magnet.…”

Section: Carbon/magnetic Nanomaterial-based Nanocompositesmentioning

confidence: 99%

Recent Advances in Magnetic Nanoparticles and Nanocomposites for the Remediation of Water Resources

Govan

2020

Magnetochemistry

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Water resources are of extreme importance for both human society and the environment. However, human activity has increasingly resulted in the contamination of these resources with a wide range of materials that can prevent their use. Nanomaterials provide a possible means to reduce this contamination, but their removal from water after use may be difficult. The addition of a magnetic character to nanomaterials makes their retrieval after use much easier. The following review comprises a short survey of the most recent reports in this field. It comprises five sections, an introduction into the theme, reports on single magnetic nanoparticles, magnetic nanocomposites containing two of more nanomaterials, magnetic nanocomposites containing material of a biologic origin and finally, observations about the reported research with a view to future developments. This review should provide a snapshot of developments in what is a vibrant and fast-moving area of research.

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Section: Carbon/magnetic Nanomaterial-based Nanocompositesmentioning

confidence: 99%

Recent Advances in Magnetic Nanoparticles and Nanocomposites for the Remediation of Water Resources

Govan

2020

Magnetochemistry

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“…Heavy-metal-contaminated water derived from industrial effluents and municipal wastes, along with growing urbanization and industrialization, presents serious threats to public health and ecosystems. , Lead has been widely explored owing to its known toxic nature and constant bioaccumulation throughout the food web. The emission of lead in drinking water has been limited to less than 0.01 mg·L –1 through strict environmental safety regulations . Studies should explore an effective approach to alleviating lead-associated water pollution.…”

Section: Introductionmentioning

confidence: 99%

“…The emission of lead in drinking water has been limited to less than 0.01 mg·L –1 through strict environmental safety regulations. 3 Studies should explore an effective approach to alleviating lead-associated water pollution.…”

Section: Introductionmentioning

confidence: 99%

One-Step Pyrolysis Fabrication of Magnetic Bagasse Biochar Composites with Excellent Lead Adsorption Performance

et al. 2022

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In the present study, a magnetically separable adsorbent, manganese ferrite (MnFe 2 O 4 )/sugarcane bagasse biochar magnetic composites (MFSCBB-MCs), was fabricated through a one-step pyrolysis method. The characterization of the prepared adsorbents indicated that MnFe 2 O 4 nanoparticles were successfully embedded into the biochar matrix, offering magnetic separability and increasing the negative charges on the surface relative to the pristine biochar. Batch adsorption tests indicated that the adsorption of lead on MFSCBB-MCs was pH- and dose-dependent. The experimental results were effectively fitted using the pseudo-second-order kinetic model ( R 2 > 0.99) and the Langmuir isotherm equation ( R 2 > 0.99), indicating the main chemisorption pathway and monolayer coverage process. Meanwhile, lead adsorption was found to be spontaneous and endothermic, as shown by the study of thermodynamic parameters. The maximum capacity, q m , calculated from the Langmuir model was 155.21 mg·g –1 at 25 °C, demonstrating excellent adsorption capability compared with several previously reported bagasse adsorbents. Based on adsorption mechanism analysis, physical adsorption, electrostatic attraction, and complexation were all involved in the lead(II) adsorption process on MFSCBB-MCs. Furthermore, the adsorbent was easily regenerated as indicated by the high magnetic separation and chemical desorption potential after five cycles, so it is a cost-effective and environmentally favorable adsorbent for wastewater lead removal.

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“…2 Both the adsorptions of anionic [3][4][5][6][7][8] and cationic dyes 7,[9][10][11] have been reported. They have also been tested as photocatalysts for the dye decomposition [12][13][14] or for the separation of heavy-metal ions [15][16][17] or other pollutants. 18 The composite was applied in photothermal therapy because of its absorption of near-infrared radiation, 19 in microwave absorption.…”

Section: Introductionmentioning

confidence: 99%

“…Both the adsorptions of anionic − and cationic dyes ,− have been reported. They have also been tested as photocatalysts for the dye decomposition − or for the separation of heavy-metal ions − or other pollutants . The composite was applied in photothermal therapy because of its absorption of near-infrared radiation, microwave absorption, , electromagnetic radiation shielding, − magnetorheology, or in the design of new materials for supercapacitor electrodes. − The list demonstrates that other than electrical properties of conducting polymers often come to the forefront…”

Section: Introductionmentioning

confidence: 99%

One-Pot Preparation of Conducting Melamine/Polypyrrole/Magnetite Ferrosponge

Stejskal

Sapurina

Vilčáková

et al. 2021

ACS Appl. Polym. Mater.

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Polypyrrole was deposited in situ on the macroporous open-cell melamine sponge by the oxidation of pyrrole with iron(III) chloride. The oxidant was used in excess, and the reaction mixture after the polymerization thus contained both iron(II) and iron(III) chlorides. These subsequently provided magnetite after treatment with ammonia solution. The conducting melamine/polypyrrole produced in the first step thus afforded melamine/polypyrrole/magnetite ferrosponge in the second.The composite sponge was characterized with respect to molecular structure by FTIR spectroscopy.The dependence of conductivity on the sponge compression is provided and magnetic properties have also been determined. The performance of sponge in electromagnetic radiation shielding in GHz region is demonstrated. While conducting polypyrrole afforded the radiation reflection, magnetite added the absorption component.

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Polypyrrole modified magnetic reduced graphene oxide composites: synthesis, characterization and application for selective lead adsorption

Abstract: Compared to Fe3O4/rGO, the PPy-FG composites showed desirable adsorption capacity and selectivity for Pb(ii) from water.

Cited by 15 publications

References 44 publications

Recent Advances in Magnetic Nanoparticles and Nanocomposites for the Remediation of Water Resources

Recent Advances in Magnetic Nanoparticles and Nanocomposites for the Remediation of Water Resources

One-Step Pyrolysis Fabrication of Magnetic Bagasse Biochar Composites with Excellent Lead Adsorption Performance

One-Pot Preparation of Conducting Melamine/Polypyrrole/Magnetite Ferrosponge

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