Synthesis of nitrogen doped carbon quantum dots/magnetite nanocomposites for efficient removal of methyl blue dye pollutant from contaminated water

Tadesse, Aschalew; RamaDevi, Dharmasoth; Hagos, Mabrahtu; Battu, Gangarao; Basavaiah, K.

doi:10.1039/c8ra00158h

Cited by 80 publications

(31 citation statements)

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“…Recently, a N-doped carbon quantum dot–magnetite nanocomposite was exploited for adsorption of methylene blue from waste water. 13 The N-doped carbon synthesized from ionic liquid@ZIF 8 was used for the removal of herbicides from water. 14 Perez-Aguilar et al reported the adsorption of Cd and Pb by N-doped multiwall carbon nanotubes prepared by the chemical vapor deposition process.…”

Section: Introductionmentioning

confidence: 99%

Nitrogen-Doped Nanoporous Carbon Nanospheroids for Selective Dye Adsorption and Pb(II) Ion Removal from Waste Water

2018

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In the presence of melamine and block copolymers, namely, F108, F127, and P123, nitrogen-doped nanoporous carbon nanospheroids (N@CNSs) were synthesized by the hydrothermal process. The F127-modified sample (CNF127) exhibits the maximum Brunauer–Emmett–Teller (BET) surface area of 773.4 m 2 /g with a pore volume of 0.877 cm 3 /g. The microstructural study reveals that nanospheroids of size 50–200 nm were aggregated together to form a chainlike structure for all triblock copolymer-modified samples. The X-ray photoelectron spectroscopy study shows the binding energies of 398.33 and 400.7 eV attributed to sp 2 (C–N=C)- and sp 3 (C–N)-hybridized nitrogen-bonded carbons, respectively. The synthesized N@CNS samples showed selective adsorption of organic dye methylene blue (MB) in the presence of methyl orange (MO) as well as Pb(II) ion removal from contaminated water. The adsorptions for MB and Pb(II) ions followed pseudo-first-order and pseudo-second-order kinetic models, respectively. The sample CNF127 showed the highest adsorption of 73 and 99.82 mg/g for MB and Pb(II) adsorptions, respectively. The adsorption capacity for MB of the copolymer-modified samples follows the order CNF127 > CNP123 > CNF108, which corroborated with the mesoporosity as well as nitrogen content of the corresponding samples. The maximum % adsorption of Pb(II) follows the order CNF127 (99.82%) > CNF108 (98.74%) > CNP123 (91.82%), and this trend is attributed to the BET surface area of the corresponding samples. This study demonstrates multicomponent removal of water pollutants, both organic dyes and inorganic toxic metal ions.

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Section: Introductionmentioning

confidence: 99%

Nitrogen-Doped Nanoporous Carbon Nanospheroids for Selective Dye Adsorption and Pb(II) Ion Removal from Waste Water

2018

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“…To optimize the analytical performance, the influence of pH and response time on Cd 2+ adsorption using PVA-CDs film were evaluated. Figure 4a shows the % adsorption of Cd 2+ using PVA-CDs and uncoated CDs at different pH values (3)(4)(5)(6)(7)(8)(9)(10)(11). The adsorption efficiency of Cd 2+ for both PVA-CDs and uncoated CDs were found to rise in alkaline solutions, with a maximum % adsorption of 91 and 83, respectively.…”

Section: Effect Of Ph and Contact Time On CD 2+ Removalmentioning

confidence: 99%

“…Due to its toxic effects on human health, the separation and elimination of Cd 2+ from aquatic media is still a hot research topic. Among the solutions, zeolites [5], polymeric compounds [6] and carbon-based materials [7,8] are the most widely used sorbents for the removal of chemical pollutants, due to their large surface area and tunable pore size.…”

Section: Introductionmentioning

confidence: 99%

Sustainable Development of Enhanced Luminescence Polymer-Carbon Dots Composite Film for Rapid Cd2+ Removal from Wastewater

Issa

Abidin

2020

Molecules

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As a remedy for environmental pollution, a versatile synthetic approach has been developed to prepare polyvinyl alcohol (PVA)/nitrogen-doped carbon dots (CDs) composite film (PVA-CDs) for removal of toxic cadmium ions. The CDs were first synthesized using carboxymethylcellulose (CMC) of oil palms empty fruit bunch wastes with the addition of polyethyleneimine (PEI) and then the CDs were embedded with PVA. The PVA-CDs film possess synergistic functionalities through increasing the content of hydrogen bonds for chemisorption compared to the pure CDs. Optical analysis of PVA-CDs film was performed by ultraviolet-visible and fluorescence spectroscopy. Compared to the pure CDs, the solid-state PVA-CDs displayed a bright blue color with a quantum yield (QY) of 47%; they possess excitation-independent emission and a higher Cd2+ removal efficiency of 91.1%. The equilibrium state was achieved within 10 min. It was found that adsorption data fit well with the pseudo-second-order kinetic and Langmuir isotherm models. The maximum adsorption uptake was 113.6 mg g−1 at an optimal pH of 7. Desorption experiments showhe that adsorbent can be reused fruitfully for five adsorption-desorption cycles using 0.1 HCl elution. The film was successfully applied to real water samples with a removal efficiency of 95.34% and 90.9% for tap and drinking water, respectively. The fabricated membrane is biodegradable and its preparation follows an ecofriendly green route.

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“…Such structure successfully removed methylene blue from aqueous solution. Tadesse et al [7] developed a magnetic nanocomposite adsorbent by combining nitrogen-doped lemon juice-derived carbon quantum dot and Fe 3 O 4 (Fe 3 O 4 @NCQDs NCS), which was used to remove methylene blue pollutants from aqueous solution and the system exhibited a good adsorption performance. In the attempt to remove Cu(II) and Pb(II) from aqueous solution, Yao et al [8] synthesized an adsorbent by grafting dialdehyde cellulose (DAC) on the GO template using triethylenetetramine as the crosslinking agent.…”

Section: Introductionmentioning

confidence: 99%

“…Such structure successfully removed methylene blue from aqueous solution. Tadesse et al . developed a magnetic nanocomposite adsorbent by combining nitrogen‐doped lemon juice‐derived carbon quantum dot and Fe 3 O 4 (Fe 3 O 4 @NCQDs NCS), which was used to remove methylene blue pollutants from aqueous solution and the system exhibited a good adsorption performance.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of a Novel CQDs‐GO‐Ag₂S Composite and Study on the Adsorption of Methylene Blue

Zhang

Liu

et al. 2020

ChemistrySelect

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The present work aims to develop a composite that takes the advantages of carbon quantum dots (CQDs) such as wide absorption band, high optical absorption coefficient and chemical stability as well as the nano‐sized silver sulfide with excellent redox capacity and the strong absorption in the visible range. Such nanocomposites were crafted on a template developed using polyethyleneimine (PEI) modified Graphene oxide (GO). The adsorption properties of methylene blue dyes were tested. With the large specific surface area, the as prepared nanocomposites achieved the removal rate of the blue dye up to 99.0%. The adsorption process was able to be described using the Freundlich isothermal model, wherein, the maximum adsorption capacity was obtained as 348 mg⋅g−1. Thermodynamic analysis indicates the adsorption is entropy driven process with ΔG < 0, ΔH > 0, and ΔS > 0. The present study shows that CQDs‐GO‐Ag2S composites as a promising adsorbent that may be applied to wastewater treatment and waste gas removal.

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Synthesis of nitrogen doped carbon quantum dots/magnetite nanocomposites for efficient removal of methyl blue dye pollutant from contaminated water

Abstract: Herein, we report the green synthesis of magnetic, nitrogen doped carbon quantum dot/Fe3O4 NPs using aqueous lemon extract for the efficient removal of organic dye pollutants from contaminated water.

Cited by 80 publications

References 50 publications

Nitrogen-Doped Nanoporous Carbon Nanospheroids for Selective Dye Adsorption and Pb(II) Ion Removal from Waste Water

Nitrogen-Doped Nanoporous Carbon Nanospheroids for Selective Dye Adsorption and Pb(II) Ion Removal from Waste Water

Sustainable Development of Enhanced Luminescence Polymer-Carbon Dots Composite Film for Rapid Cd2+ Removal from Wastewater

Synthesis of a Novel CQDs‐GO‐Ag₂S Composite and Study on the Adsorption of Methylene Blue

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Synthesis of nitrogen doped carbon quantum dots/magnetite nanocomposites for efficient removal of methyl blue dye pollutant from contaminated water

Abstract: Herein, we report the green synthesis of magnetic, nitrogen doped carbon quantum dot/Fe3O4 NPs using aqueous lemon extract for the efficient removal of organic dye pollutants from contaminated water.

Cited by 80 publications

References 50 publications

Nitrogen-Doped Nanoporous Carbon Nanospheroids for Selective Dye Adsorption and Pb(II) Ion Removal from Waste Water

Nitrogen-Doped Nanoporous Carbon Nanospheroids for Selective Dye Adsorption and Pb(II) Ion Removal from Waste Water

Sustainable Development of Enhanced Luminescence Polymer-Carbon Dots Composite Film for Rapid Cd2+ Removal from Wastewater

Synthesis of a Novel CQDs‐GO‐Ag2S Composite and Study on the Adsorption of Methylene Blue

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Synthesis of a Novel CQDs‐GO‐Ag₂S Composite and Study on the Adsorption of Methylene Blue