Fabrication of ultra-light graphene-based gels and their adsorption of methylene blue

Ma, Tiantian; Chang, Peter R.; Zheng, Pengwu; Zhao, Feng; Ma, Xiaofei

doi:10.1016/j.cej.2013.10.077

Cited by 174 publications

(65 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The value of R L is indicative of the nature of the isotherm and may be either unfavorable (R L [ 1), linear (R L = 1), favorable (0 \ R L \ 1), or irreversible (R L = 0 n value indicated the high adsorption strength, consistent with the large K value of the Langmuir model. It was reported that the adsorption of MB on the graphene adsorbents is mainly due to both electrostatic interaction and p-p stacking interaction [1,23,24]. As previously confirmed by FTIR results, there are plenty of oxygen-containing groups such as epoxy, hydroxyl, and carboxyl on the GO surface (Fig.…”

Section: Adsorption Isothermssupporting

confidence: 66%

“…In addition, surface area reduction of GO during the drying, which is attributed to stacking of graphene sheets [20], is another problem that results in a reduction of adsorption capacity. An appropriate cost-effective solution to overcome such problems is the use of graphene oxide aerogel (GOA) that recently have been suggested by some researchers [21][22][23]. Although GO has shown its effectiveness for the removal of MB [1,24], so far single GOA has not been used to adsorb MB.…”

Section: Introductionmentioning

confidence: 98%

See 1 more Smart Citation

Removal of methylene blue from water by graphene oxide aerogel: thermodynamic, kinetic, and equilibrium modeling

Zamani

Tabrizi

2014

Res Chem Intermed

View full text Add to dashboard Cite

Existence of many functional groups on graphene oxide sheets offers potential applications for the removal of environmental pollutants such as heavy metals and dyes. Moreover, materials with aligned porosity in the micrometer range could further enhance the adsorption capability by providing more adsorption sites. In this paper, the performance of graphene oxide aerogel (GOA) prepared by ice segregation induced self-assembly method was investigated as an adsorbent to remove methylene blue (MB) from aqueous solutions. The adsorbent was characterized by XRD, FTIR, TEM, SEM, EDX, and BET. The results showed that GOA has extremely high adsorption capacity for removal of MB. The equilibrium of MB removal process by GOA was well described by the Langmuir isotherm model, with a maximum adsorption capacity of 416.6667 mg g -1 . The results of the thermodynamic investigations indicated that the adsorption reactions were spontaneous (DG°\ 0), endothermic (DH°[ 0) and the adsorption kinetics of MB on GOA was best fitted to the pseudo-second-order model.

show abstract

Section: Adsorption Isothermssupporting

confidence: 66%

Section: Introductionmentioning

confidence: 98%

Removal of methylene blue from water by graphene oxide aerogel: thermodynamic, kinetic, and equilibrium modeling

Zamani

Tabrizi

2014

Res Chem Intermed

View full text Add to dashboard Cite

show abstract

“…(2015) [1][2][3][4][5][6][7][8][9][10][11][12][13] www.deswater.com doi: 10.1080/19443994.2015.1025851 necrosis [4]. Therefore, many different ways are used to remove MB and other harmful dyes from industrial wastes.…”

Section: Desalination and Water Treatmentmentioning

confidence: 99%

“…Therefore, many different ways are used to remove MB and other harmful dyes from industrial wastes. Many physical, chemical, and biological processes have been investigated for this purpose, including adsorption [5,6], biosorption [7], photodecomposition [8], and ultrafiltration [9].…”

Section: Desalination and Water Treatmentmentioning

confidence: 99%

Synthesized multi-walled carbon nanotubes as a potential adsorbent for the removal of methylene blue dye: kinetics, isotherms, and thermodynamics

Selen

Güler

Özer

et al. 2015

Desalination and Water Treatment

View full text Add to dashboard Cite

A B S T R A C TMulti-walled carbon nanotubes (MWCNTs) are a highly effective adsorbent of methylene blue (MB), and they can be used to remove MB from aqueous solutions. In this study, we used MWCNTs that were synthesized by chemical vapor deposition method. The physicochemical properties of MWCNTs were characterized by Brunauer-Emmett-Teller (BET) surface area, surface functional group analysis by fourier transform infrared (FTIR) analysis, zero point charge (pH zpc ), X-ray diffraction (XRD), and transmission electron microscopy (TEM). The factors that affected the adsorption properties of MB onto MWCNTs were investigated, including initial pH, contact time, dosage, initial concentration, and temperature. The equilibrium adsorption data were analyzed using two common adsorption models, i.e. the Langmuir and Freundlich models. The results indicated that the Langmuir isotherm fits the experimental results well. The maximum adsorption capacity obtained from the equation of the Langmuir isotherm at 323 K was 95.30 mg/g, indicating that the MWCNTs adsorbed MB effectively. The kinetic study illustrated that the adsorption of MB onto MWCNTs fits the pseudo-second-order kinetic model. The thermodynamic parameters indicated that the adsorption of MB onto MWCNTs was a spontaneous, endothermic process.

show abstract

“…Graphene was modified using carboxylic (G-COO -) since it increases polarity and negative charges followed by simply adsorbing cationic MB. Monolithic GO gels was showed to have high adsorption capacity (833.3 mg g -1 ) towards MB [98]. This is possibly explained by anionic nature of GO and MB as cationic dye, high porosity of monolith GO gels, and existence of electrostatic and π-π interaction.…”

Section: Application Of Graphene-based Spe For Isolation Of Organic Pmentioning

confidence: 85%

Graphene-Based Materials as Solid Phase Extraction Sorbent for Trace Metal Ions, Organic Compounds, and Biological Sample Preparation

Ibrahim

Nodeh

Sanagi

2015

Critical Reviews in Analytical Chemistry

105

View full text Add to dashboard Cite

Graphene is a new carbon-based material that is of interest in separation science. Graphene has extraordinary properties including nano size, high surface area, thermal and chemical stability, and excellent adsorption affinity to pollutants. Its adsorption mechanisms are through non-covalent interactions (π-π stacking, electrostatic interactions, and H-bonding) for organic compounds and covalent interactions for metal ions. These properties have led to graphene-based material becoming a desirable adsorbent in a popular sample preparation technique known as solid phase extraction (SPE). Numerous studies have been published on graphene applications in recent years, but few review papers have focused on its applications in analytical chemistry. This article focuses on recent preconcentration of trace elements, organic compounds, and biological species using SPE-based graphene, graphene oxide, and their modified forms. Solid phase microextraction and micro SPE (µSPE) methods based on graphene are discussed.

show abstract

Fabrication of ultra-light graphene-based gels and their adsorption of methylene blue

Cited by 174 publications

References 24 publications

Removal of methylene blue from water by graphene oxide aerogel: thermodynamic, kinetic, and equilibrium modeling

Removal of methylene blue from water by graphene oxide aerogel: thermodynamic, kinetic, and equilibrium modeling

Synthesized multi-walled carbon nanotubes as a potential adsorbent for the removal of methylene blue dye: kinetics, isotherms, and thermodynamics

Graphene-Based Materials as Solid Phase Extraction Sorbent for Trace Metal Ions, Organic Compounds, and Biological Sample Preparation

Contact Info

Product

Resources

About