Preparation of surface functionalized graphene oxide nanosheet and its multicomponent dye removal ability from wastewater

Hosseinabadi-Farahani, Zahra; Mahmoodi, Niyaz Mohammad; Hosseini‐Monfared, Hassan

doi:10.1007/s12221-015-1035-4

Cited by 69 publications

(13 citation statements)

References 33 publications

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“…3. It can be clearly observed that the surface of rGO comprises crumpled and corrugated sheets which are both intrinsic properties of graphenic sheets [32][33][34]. From Fig.…”

Section: Resultsmentioning

confidence: 85%

“…In our research, we used a top-down approach for synthesis of reduced graphene oxide (rGO) from graphite. Graphite flake powder was first thoroughly oxidized by means of chemical agents including H 2 SO 4 , KMnO 4 , and H 2 O 2 using the modified Hummers' method [32]. In the next step, the rGO was prepared using a simple and green hydrothermal method in an alkaline medium [33].…”

Section: Introductionmentioning

confidence: 99%

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Preparation of Modified Reduced Graphene Oxide nanosheet with Cationic Surfactant and its Dye Adsorption Ability from Colored Wastewater

Mahmoodi

Maroofi

Mazarji

et al. 2017

J Surfact & Detergents

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In this paper, reduced graphene oxide (rGO) nanosheet from graphite was synthesized using the top‐down approach. The surface of rGO was modified by cetyltrimethylammonium bromide (CTAB) to prepare rGO/CTAB adsorbent for anionic dye removal. The prepared rGO/CTAB was characterized by XRD, FTIR, FE‐SEM and TGA. The operation parameters (surfactant concentration, adsorbent dosage, pH and initial concentration of dye solution) affecting the batch adsorption process to remove direct red 80 (DR80) and direct red 23 (DR23) were studied in detail. The dye adsorption capacity of rGO/CTAB was 213 and 79 mg/g for DR80 and DR23, respectively. In addition, dye removal followed the Langmuir isotherm with pseudo‐second order reaction kinetics.

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“…3. It can be clearly observed that the surface of rGO comprises crumpled and corrugated sheets which are both intrinsic properties of graphenic sheets [32][33][34]. From Fig.…”

Section: Resultsmentioning

confidence: 85%

Section: Introductionmentioning

confidence: 99%

Preparation of Modified Reduced Graphene Oxide nanosheet with Cationic Surfactant and its Dye Adsorption Ability from Colored Wastewater

Mahmoodi

Maroofi

Mazarji

et al. 2017

J Surfact & Detergents

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“…It is assumed that the stronger binding sites are occupied first, and that the binding strength decreases with increasing site occupancy. 69 The Freundlich isotherm is expressed as:where K f (mg g −1 ) is the adsorption capacity at unit concentration and 1/ n is the adsorption intensity. The 1/ n values indicate the type of isotherm: irreversible (1/ n = 0), favorable (0 < 1/ n < 1) and unfavorable (1/ n > 1).…”

Section: Resultsmentioning

confidence: 99%

“…It is assumed that the stronger binding sites are occupied first, and that the binding strength decreases with increasing site occupancy. 69 The Freundlich isotherm is expressed as:…”

Section: Adsorption Isothermmentioning

confidence: 99%

Design of a novel Ag-MOF@GO composite with a high specific surface area and structural stability for the efficient removal of malachite green

Deng

Zhao

et al. 2023

New J. Chem.

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“…Subsequently, the high significant electrostatic attraction occurs between the positively charged surface of the adsorbent (NH 3 + ) and negatively charged anionic dye molecules [56]. As the pH of the system increases, the number of positively charged sites decreases.…”

Section: 4 3d Surface Plot Analysis and Optimization Processmentioning

confidence: 99%

Synthesis of amine-modified zeolitic imidazolate framework-8, ultrasound-assisted dye removal and modeling

Abdi

Vossoughi

Mahmoodi

et al. 2017

Ultrasonics Sonochemistry

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135

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The present research is focused on the ultrasound assisted adsorption of Acid blue 92 (AB92) and Direct red 80 (DR80) as anionic dyes in single and binary systems onto zeolitic imidazolate framework (ZIF-8) functionalized with 3-Aminopropyltrimethoxysilane (APTES). Different techniques such as Fourier transform infrared (FTIR), scanning electron microscope (SEM), field emission scanning electron microscopy (FE-SEM), X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET) and thermogravimetric analyses (TGA) were used to characterize the prepared adsorbent. The individual effects and possible interactions between the various parameters including adsorbent dosage, sonication time, initial dye concentrations and pH on dyes removal efficiency were investigated by response surface methodology (RSM). The optimized experimental conditions were fixed at adsorbent dosage 0.005g for AB92 and 0.01g for DR80, pH 2.1, sonication time 15min, and initial dyes concentration 15mgL to get maximum removal percentage (>95.0%). A reliable and intelligent model based on least-squares support vector machine (LS-SVM) was developed to predict dye removal efficiency. The root mean square error (RMSE) of 0.604, 0.734 and 1.549 with high determination coefficient (R) of 0.999, 0.996 and 0.997 for AB92, DR80 and binary system, respectively, were able to predict and model the adsorption process. The presented model illustrates better performance in predicting dye removal efficiency compared to the kinetic models. The results showed that the adsorption process had better conformation with pseudo-second order model. The adsorption equilibrium data was investigated by Langmuir, Freundlich, Tempkin and Dubinin-Radushkevich isotherm models and the data were well fitted by Langmuir model with maximum adsorption capacity of 633.4 and 500.2mgg for AB92 and DR80 dyes, respectively. APTES@ZIF-8 was regenerated and found to be reusable after four successive cycles without considerable loss in adsorption capacity.

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Preparation of surface functionalized graphene oxide nanosheet and its multicomponent dye removal ability from wastewater

Cited by 69 publications

References 33 publications

Preparation of Modified Reduced Graphene Oxide nanosheet with Cationic Surfactant and its Dye Adsorption Ability from Colored Wastewater

Preparation of Modified Reduced Graphene Oxide nanosheet with Cationic Surfactant and its Dye Adsorption Ability from Colored Wastewater

Design of a novel Ag-MOF@GO composite with a high specific surface area and structural stability for the efficient removal of malachite green

Synthesis of amine-modified zeolitic imidazolate framework-8, ultrasound-assisted dye removal and modeling

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