Green synthesis of graphene-oxide based nanocomposites for efficient removal of methylene blue dye from wastewater

Desalination, Год журнала: 2023, Номер 564, С. 116749 - 116749

Опубликована: Июнь 5, 2023

Язык: Английский

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Synthesis of highly fluorescent carbon quantum dots from rubber seed shells for the adsorption and photocatalytic degradation of dyes

Scientific Reports, Год журнала: 2023, Номер 13(1)

Опубликована: Авг. 7, 2023

The potentials of biomass-based carbon quantum dot (CQD) as an adsorbent for batch adsorption dyes and its photocatalytic degradation capacity which are congo red (CR) methylene blue (MB) have been conducted in this study. CQDs properties, performance, behaviour, photoluminescence characteristics were assessed using experiments carried out under operating conditions including, temperature, pH dosage. morphological analysis revealed that highly porous, uniform, closely aligned multi-layered. presence hydroxyl, carboxyl carbonyl functional groups indicated the significance oxygenated groups. Spectral confirmed their photoluminescent quality by exhibiting high excitation intensity possessing greenish-blue fluorescence UV radiation. removal percentage adsorbed both CR MB was 77% 75%. Langmuir isotherm pseudo-second-order models fitted results. Thermodynamics process exothermic spontaneous, with excellent reusability stability. efficiency on more than 90% sunlight irradiation obeyed first-order kinetic model. These results demonstrated to be outstanding photocatalyst organic dye degradation.

Язык: Английский

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A magnetic and antibacterial nanocomposite based on graphene oxide nanosheets embedded with Zn-Fe layered double hydroxide as a novel and highly effective adsorbent for the removal of methylene blue dye

Diamond and Related Materials, Год журнала: 2024, Номер 144, С. 111010 - 111010

Опубликована: Март 8, 2024

Язык: Английский

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Mesoporous phosphorus-doped activated carbon from Acacia falcata: Mechanistic insights into Cr (VI) removal, regeneration, and spiking studies

Diamond and Related Materials, Год журнала: 2025, Номер unknown, С. 112015 - 112015

Опубликована: Янв. 1, 2025

Язык: Английский

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Magnetic Fe3O4 nanoparticles loaded guava leaves powder impregnated into calcium alginate hydrogel beads (Fe3O4-GLP@CAB) for efficient removal of methylene blue dye from aqueous environment: Synthesis, characterization, and its adsorption performance

International Journal of Biological Macromolecules, Год журнала: 2023, Номер 246, С. 125675 - 125675

Опубликована: Июль 4, 2023

Язык: Английский

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A response surface methodology approach for the removal of methylene blue dye from wastewater using sustainable and cost-effective adsorbent

Process Safety and Environmental Protection, Год журнала: 2024, Номер 184, С. 129 - 150

Опубликована: Фев. 3, 2024

Potable water availability is becoming increasingly challenging due to increasing level of global population and industrial revolution. The disproportionate use methylene blue (MB), particularly in applications, a growing concern its high resistance biodegradation propensity taint aquatic environments. In this study, we developed novel eco-friendly calcium oxide nanoparticles from eggshells fishbones (CaONPs-ES CaONPs-FB) decorated them on graphene (GO) surfaces. Both nanocomposites (CaONPs-ES@GO CaONPs-FB@GO) were characterized using state-art-instruments used for the removal MB aqueous solutions. transmission electron. Additionally, adsorptive performance CaONPs-ES@GO CaONPs-FB@GO their mechanisms interaction with investigated. BET, SEM/EDX, XPS results revealed that predominantly mesoporous, surface areas 112 m²/g 108 m²/g, respectively. temperature-dependent adsorption isotherms kinetics towards consistent Redlich-Peterson pseudo-second-order models, model demonstrated an similarity Freundlich more than Langmuir model, suggesting dominance heterogeneous multilayer mechanism. synthesized exhibited reusability stability (>70%) even after 10 successive adsorption-desorption cycles. Thermodynamic evaluations process was spontaneous, endothermic, physically driven. outstanding selective behaviour mixture containing MB/RhB MB/MO separation efficiency 99.10% 77.34% CaO-ES@GO, 61.23% 47.81% CaO-FB@GO particulate within primarily involved π-π interaction, hydrogen bonding, pore-filling, electrostatic attraction. cost analysis are economical treating large-scale application. Based statistical response methodology (RSM), contributing effects temperature adsorbent dosage, as well single effect pH, had most significant impact removal. demonstrate promising potential sustainable treatment.

Язык: Английский

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Synthesis of a novel chitosan-TiO2 nanocomposite as an efficient adsorbent for the removal of methylene blue cationic dye from wastewater

Journal of Molecular Structure, Год журнала: 2024, Номер 1319, С. 139420 - 139420

Опубликована: Июль 27, 2024

Язык: Английский

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A new material fabricated by the combination of natural mineral perlite and graphene oxide: Synthesis, characterization, and methylene blue removal

Diamond and Related Materials, Год журнала: 2024, Номер 143, С. 110848 - 110848

Опубликована: Фев. 6, 2024

Язык: Английский

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Mesoporous nanocomposite polydopamine-coated graphene oxide/maghemite for high-efficient adsorption of diclofenac sodium in batch mode: synthesis, characterization, RSM modeling and optimization

Journal of Porous Materials, Год журнала: 2025, Номер unknown

Опубликована: Янв. 21, 2025

Язык: Английский

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Kinetics and adsorption performance of biosorbent starch/poly(vinyl alcohol)/graphene oxide nanocomposite for the removal of dyes

Journal of Umm Al-Qura University for Applied Sciences, Год журнала: 2023, Номер 9(4), С. 529 - 547

Опубликована: Июль 10, 2023

Abstract The present work reports an efficient removal of a cationic dye, methylene blue (MB), and anionic methyl orange (MO) dye from aqueous solution using graphene oxide (GO)–based nanocomposite as adsorbent. GO was investigated potential nano-reinforcing filler in starch/poly(vinyl alcohol) (PVA) biopolymer matrix. Bio-nanocomposite based on starch/PVA matrix were prepared by casting method. fabricated nanocomposites characterized FT-IR, XRD, Raman, TEM, FE-SEM, tensile study, Brunauer–Emmett–Teller (BET) method, Barrett–Joyner–Halenda (BJH) zeta potential, swelling study. effect the various compositions nanofiller highlighted impact nanosheets properties revealed. results demonstrated that with 3 g found to be optimal concentration GO. Batch adsorption experiments conducted optimize operational factors, including adsorbent dosage, pH, contact time, which systematically investigated. kinetics followed pseudo-second-order model, while Langmuir isotherm model described equilibrium capacity. exhibited maximum monolayer capacity 382 mg −1 for MB 293.3 MO dye. Based calculated thermodynamic parameters (∆H° = − 16.37 kJ mol , ∆S° 37.99 J K ∆G° 4.39 5.13 ) 13.72 31.78 3.72 dyes onto material feasible, exothermic, spontaneous. A plausible mechanism proposed, involving electrostatic attraction, H-bonding, π-π interactions, collectively governed process. showed good stability reusability up five cycles uptake dyes. These findings confirmed effectiveness proposed approach produce bionanocomposite enhanced properties, may used water purification technology.

Язык: Английский

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