Graphene oxide nanosheet: preparation and dye removal from binary system colored wastewater

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

doi:10.1080/19443994.2014.960462

Cited by 89 publications

(25 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: 86%

“…2. For GO, the bands at 3419, 1729, 1620, 1222 and 1051 cm -1 are attributed to OH stretching, -C=O stretching (COOH group), C=C stretching (aromatic rings), C-O stretching (COOH group), and C-O-C stretching (epoxy group), respectively [34]. On the other hand, rGO upon hydrothermal treatment loses a large amount of oxygen functional groups, thus decreasing the intensities of the rGO bands associated with oxygen functional groups.…”

Section: Resultsmentioning

confidence: 99%

“…The synthesis of GO was based on one of our previously published papers [34]. Briefly, in a 500 mL flask immersed in an ice bath, 2 g of graphite powder was added to 100 mL of H 2 SO 4 98% solution followed by 4 g NaNO 3 while stirring vigorously.…”

Section: Synthesis Of Go and Rgomentioning

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: 86%

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

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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“…A comparison of the maximum adsorption capacity and the main adsorption factors of the developed NOAC-based batch adsorption method with the other published adsorption methods for the removal of BR46 and BY13 dyes from single and binary systems 2,14,[22][23][24][25][26][27] were reported in Table V. Obviously, the adsorption capacity of NOAC used in this study is significantly high for single and binary systems.…”

Section: Comparison Of the Developed Noac-based Adsorption Methods Witmentioning

confidence: 94%

Nitrogen-modified nanoporous activated carbon from eucalyptus leaves for ultrasound-assisted removal of basic dyes using derivative spectrophotometric method

Khaligh

Mousavi

Rashidi³

et al. 2018

JSCS

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The nanoporous activated carbon (AC) was prepared from the eucalyptus leaves via chemical activation with KOH, then treated with nitric acid/ /urea (NOAC) and finally used as a new adsorbent for simultaneous ultrasound-assisted removal of basic red 46 (BR46) and basic yellow 13 (BY13) dyes from binary aqueous solutions. The NOAC nano-adsorbent was characterized with SEM, TEM, Raman, BET, FTIR, CHN, pH pzc and Boehm titration analysis. Both of the AC and NOAC samples had superior BET surface area of 2222 and 1572 m 2 g-1 with average micropore volume of 0.81 and 0.50 cm 3 g-1 , respectively. First order derivative spectrophotometric method was used for analysis of BY13 in binary mixtures. Small amount of the adsorbent (30 mg) was capable to remove high percentage of dyes (>99 %) in a very short time (8 min). The adsorption of dyes follows the Langmuir isotherm and the pseudo-second-order kinetics. The adsorption capacities of NOAC for single solutions of BR46 and BY13 were 1111 and 1250 mg g-1 as well as for binary solutions were 769 and 909 mg g-1 , respectively. The adsorption thermodynamics were also explored. Exhausted NOAC was regenerated using HCl (2 M) and reused for five adsorption-desorption cycles with high performance.

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“…With the high aspect ratio, thin graphene sheets typically possess high specific surface area, allowing a large number of sites for interaction with other materials. Among graphene‐related materials, reduced graphene oxide and, especially, GO were used as dye adsorbents or incorporated into polymer matrices for enhancement of the dye adsorption performance of the polymers …”

Section: Introductionmentioning

confidence: 99%

Crosslinking assisted fabrication of ultrafine poly(vinyl alcohol)/functionalized graphene electrospun nanofibers for crystal violet adsorption

Chailek

Daranarong

Punyodom

et al. 2018

J of Applied Polymer Sci

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This article reports the fabrication of water-stable electrospun mats made from water-soluble poly(vinyl alcohol) and comprising ultrafine nanofibers for a high surface area to volume ratio as required for the adsorption of crystal violet. Acid-catalyzed crosslinking is uniquely demonstrated as a facile strategy to improve water stability and, just as importantly, fine-tune the nanofiber size of the electrospun mats. Amine-functionalized graphene nanoplatelets are incorporated as an adsorption performance enhancer instead of the more widely reported graphene oxide. The functionalized graphene also facilitates fabrication of the composite electrospun mats by direct mixing of the water-dispersible graphene with the aqueous polymer solution. The enhanced adsorption performance of the polymer nanocomposite mats is explained in detail at the molecular level, while the adsorption mechanism is supported by adsorption isotherm and related kinetic data. Moreover, the adsorbent mats can be removed from the water after use with the mat integrity still maintained.

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Graphene oxide nanosheet: preparation and dye removal from binary system colored wastewater

Cited by 89 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

Nitrogen-modified nanoporous activated carbon from eucalyptus leaves for ultrasound-assisted removal of basic dyes using derivative spectrophotometric method

Crosslinking assisted fabrication of ultrafine poly(vinyl alcohol)/functionalized graphene electrospun nanofibers for crystal violet adsorption

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