Systematic study of graphene oxide production using factorial design techniques and its application to the adsorptive removal of methylene blue dye in aqueous medium

Araújo, Caroline Maria Bezerra de; Filho, Romero Barbosa de Assis; Baptisttella, Ana Maria Salgueiro; Nascimento, Gabriel Filipe Oliveira do; Costa, Gabriel Rodrigues Bezerra da; Carvalho, Mário de Faria; Ghislandi, Marcos Gomes; Sobrinho, Maurı́cio Alves da Motta

doi:10.1088/2053-1591/aacb51

Cited by 36 publications

(9 citation statements)

References 42 publications

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“…The GO sample was produced based on a modified version of the Hummers and Offeman [23] method, proposed by Araujo et al, [19] in the absence of NaNO 3 . 1 g of graphite powder (99% A.P., Synth, Brazil) was used as a precursor and mixed with 25 mL of concentrated sulphuric acid (H 2 SO 4 95% A.P., AnalaR NORMAPUR VWR Chemicals, France).…”

Section: Production and Characterization Of Graphene Oxidementioning

confidence: 99%

“…GO structure was observed by using different techniques. To determine the pH at the point of zero charge (pH PZC ), the experiment of 11 points was performed, [19,20,24] and the final pH value was determined using a bench pH meter type PHTEK, PHS-3B (Quimis, Brazil). Fourier transform infrared spectroscopy (FTIR) was carried out using a spectrometer model Tensor 27 (Brucker) with total attenuated reflectance (ATR) and wavenumber ranging from 500-4000 cm −1 .…”

Section: Production and Characterization Of Graphene Oxidementioning

confidence: 99%

“…According to previous studies that used graphene oxide to remove dyes from water, depending on the type of dye (cationic, anionic, azo, or reactive), adsorption onto GO is a physical phenomenon, which might occur by both electrostatic interactions with functional groups and/or π-π interactions. [13,16,[18][19][20][21][22] This significant physical attraction between the dyes and GO facilitates the colour removing process, making it quick. According to Yang et al, [16] MB adsorption onto GO reaches the equilibrium almost immediately, as the GO-MB complex aggregates and precipitates within a few seconds.…”

Section: Kinetics Of Contaminants Removal Using Gomentioning

confidence: 99%

“…[17] Studies examining the application of GO in adsorptive processes that only consider the removal of dyes in water have been widely reported. The application of GBM in the adsorptive removal of direct, reactive, [18] anionic, and cationic [13,16,[19][20][21][22] dyes from water has been investigated and has shown promising results. Nevertheless, the investigation of these materials as a means of treating real textile wastewater samples is still limited.…”

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Real textile wastewater treatment using nano graphene‐based materials: Optimum pH, dosage, and kinetics for colour and turbidity removal

et al. 2020

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Textile effluent is one of the most hazardous types of wastewater for both the environment and human health when discharged without proper treatment.This work stands out as one of the first to evaluate the parameters for the application of graphene oxide (GO) to treat real textile wastewater. A comparative analysis was conducted to investigate the removal efficiencies of turbidity and apparent colour from raw textile wastewater using GO. The effects of different parameters, such as GO dosage, pH, and contact time were discussed, considering a removal mechanism based on the salting out effect. Results regarding treatment using GO followed by centrifugation showed that in >1 hour nearly 90% turbidity was decreased, and an apparent colour removal efficiency over 76% was recorded, which is twice the value obtained with the conventional treatment applied in textile mills. Over 60% chemical oxygen demand was reduced. Tests using GO followed by sedimentation also revealed promising results, showing removal efficiencies of 66% and 88% for apparent colour and turbidity, respectively. These results suggest that GO could be promising for real wastewater treatment. K E Y W O R D Sapparent colour, graphene oxide, salting out effect, textile wastewater, turbidity

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Section: Production and Characterization Of Graphene Oxidementioning

confidence: 99%

Section: Production and Characterization Of Graphene Oxidementioning

confidence: 99%

Section: Kinetics Of Contaminants Removal Using Gomentioning

confidence: 99%

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Real textile wastewater treatment using nano graphene‐based materials: Optimum pH, dosage, and kinetics for colour and turbidity removal

et al. 2020

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“…More and more synthetic dyes and pigments are being produced. However, the applications of some synthetic dyes and pigments have detrimental effects on the environment [ 2 ]. With the development of science and technology, some traditional dyes and pigments can no longer meet the growing demand for color performance, corrosion resistance [ 3 ], photoelectric conversion efficiency [ 4 , 5 , 6 ], etc.…”

Section: Introductionmentioning

confidence: 99%

Graphene-Oxide-Based Fluoro- and Chromo-Genic Materials and Their Applications

et al. 2022

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Composite materials and their applications constitute a hot field of research nowadays due to the fact that they comprise a combination of the unique properties of each component of which they consist. Very often, they exhibit better performance and properties compared to their combined building blocks. Graphene oxide (GO), as the most widely used derivative of graphene, has attracted widespread attention because of its excellent properties. Abundant oxygen-containing functional groups on GO can provide various reactive sites for chemical modification or functionalization of GO, which in turn can be used to develop novel GO-based composites. This review outlines the most recent advances in the field of novel dyes and pigments encompassing GO as a key ingredient or as an important cofactor. The interactions of graphene with other materials/compounds are highlighted. The special structure and unique properties of GO have a great effect on the performance of fabricated hybrid dyes and pigments by enhancing the color performance of dyes, the anticorrosion properties of pigments, the viscosity and rheology of inks, etc., which further expands the applications of dyes and pigments in dyeing, optical elements, solar-thermal energy storage, sensing, coatings, and microelectronics devices. Finally, challenges in the current development as well as the future prospects of GO-based dyes and pigments are also discussed. This review provides a reference for the further exploration of novel dyes and pigments.

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Interface adjustment between poly(ethylene terephthalate) and graphene oxide in order to enhance mechanical and thermal properties of nanocomposites

Souza

Pinto

Silva

et al. 2021

Polymer Engineering & Sci

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There is great interest in the use of graphene and derivatives in the production of polymer nanocomposites as it provides improvements in the properties of the materials to which they are associated. Such improvements depend heavily on filler dispersion and the interaction between the nanomaterials and the matrix. This work aimed to study the compatibility of graphene oxide (GO) with a poly(ethylene terephthalate) matrix. For this, graphite was modified using Hummers method, using reaction times of 3 and 6 h. The obtained GO was functionalized with amine, amide, and magnetite groups (FGO). The effects of the oxidation degree, functionalization and concentration of the nanofillers on the dispersion and consequently on the properties of the polymer nanocomposites were evaluated. The nanocomposites were synthesized by the solid–solid deposition method followed by the melt mixing technique. It was observed that lower concentrations of nanofiller associated with the lower degree of oxidation and functionalization improved the interaction of the nanofillers with the matrix, which resulted in better mechanical properties under tensile stresses for strain at break, maximum stress, Young's modulus and toughness. It was also observed that the glass transition and crystallization of nanocomposites increased due to a nucleating effect of the nanofillers.

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Systematic study of graphene oxide production using factorial design techniques and its application to the adsorptive removal of methylene blue dye in aqueous medium

Cited by 36 publications

References 42 publications

Real textile wastewater treatment using nano graphene‐based materials: Optimum pH, dosage, and kinetics for colour and turbidity removal

Real textile wastewater treatment using nano graphene‐based materials: Optimum pH, dosage, and kinetics for colour and turbidity removal

Graphene-Oxide-Based Fluoro- and Chromo-Genic Materials and Their Applications

Interface adjustment between poly(ethylene terephthalate) and graphene oxide in order to enhance mechanical and thermal properties of nanocomposites

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