Graphene oxide-chitosan composite aerogel for adsorption of methyl orange and methylene blue: Effect of pH in single and binary systems

Shi, Yawei; Song, Guobin; Li, Anqi; Wang, Jun; Wang, Haonan; Sun, Ya; Ding, Guanghui

doi:10.1016/j.colsurfa.2022.128595

Cited by 67 publications

(14 citation statements)

References 74 publications

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“…In addition, the dye molecules are not only different in structure, but charge properties are also different, AF and CR belong to anionic dyes, and MO and MB belong to cationic dyes. The addition of GO improves the adsorption capacity of Alg-Cu@GO for cationic dyes but decreases the adsorption capacity of anionic dyes, which is consistent with the adsorption capacity of GO itself in previous studies [ 43 ]. Compared with GO, MOF-525 can improve the adsorption properties of various dyes, independent of the charge they carry.…”

Section: Resultssupporting

confidence: 90%

Effective Removal of Tetracycline from Water Using Copper Alginate @ Graphene Oxide with In-Situ Grown MOF-525 Composite: Synthesis, Characterization and Adsorption Mechanisms

Chen

et al. 2022

Nanomaterials

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For nanomaterials, such as GO and MOF-525, aggregation is the main reason limiting their adsorption performance. In this research, Alg-Cu@GO@MOF-525 was successfully synthesized by in-situ growth of MOF-525 on Alg-Cu@GO. By dispersing graphene oxide (GO) with copper alginate (Alg-Cu) with three-dimensional structure, MOF-525 was in-situ grown to reduce aggregation. The measured specific surface area of Alg-Cu@GO@MOF-525 was as high as 807.30 m2·g−1, which is very favorable for adsorption. The synthesized material has affinity for a variety of pollutants, and its adsorption performance is significantly enhanced. In particular, tetracycline (TC) was selected as the target pollutant to study the adsorption behavior. The strong acid environment inhibited the adsorption, and the removal percentage reached 96.6% when pH was neutral. Temperature promoted the adsorption process, and 318 K adsorption performance was the best under experimental conditions. Meanwhile, 54.6% of TC could be removed in 38 min, and the maximum adsorption capacity reached 533 mg·g−1, far higher than that of conventional adsorption materials. Kinetics and isotherms analysis show that the adsorption process accords with Sips model and pseudo-second-order model. Thermodynamic study further shows that the chemisorption is spontaneous and exothermic. In addition, pore-filling, complexation, π-π stack, hydrogen bond and chemisorption are considered to be the causes of adsorption.

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Section: Resultssupporting

confidence: 90%

Effective Removal of Tetracycline from Water Using Copper Alginate @ Graphene Oxide with In-Situ Grown MOF-525 Composite: Synthesis, Characterization and Adsorption Mechanisms

Chen

et al. 2022

Nanomaterials

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“…The chemical structure of chitosan (CS) contains several active groups, such as amino- (-NH 2 ) and hydroxyl- (-OH) groups, which serve as coordination sites for various pollutants; therefore, it is considered as an efficient adsorbent material for wastewater treatment [ 10 ]. Recently, many works have been investigated to modify the chitosan to enhance its efficiency in removing dyes and other pollutants from wastewater [ 2 , 3 , 7 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 ]. Modification of CS with carboxymethyl to synthesize a novel cross-linked O-CM-chitosan hydrogel adsorbent materials to remove the MB dye [ 2 ].…”

Section: Introductionmentioning

confidence: 99%

“…As reported in the literature, GO was cross-linked with CS to prepare a composite material to adsorb MB-dye [ 20 ]. GO-CS composite aerogel aerogels was fabricated using postponed crosslinking to adsorb MB-dye [ 19 ]. Also, CS-GO composite hydrogels was investigated as an efficient adsorbent to remove MB-dye [ 12 ].…”

Section: Introductionmentioning

confidence: 99%

Chitosan-Functionalized-Graphene Oxide (GO@CS) Beads as an Effective Adsorbent to Remove Cationic Dye from Wastewater

et al. 2022

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In this study, the preparation of graphene oxide@chitosan (GO@CS) composite beads was investigated via continuous dropping techniques to remove methylene blue (MB)-dye from an aqueous media. The prepared beads were characterized using various techniques before and after the adsorption of MB. The experimental results showed that the adsorption processes fit the kinetic pseudo-second-order and Langmuir isotherm models. Moreover, the GO@CS beads achieve maximum adsorption capacities of 23.26 mgg−1, which was comparable with other adsorbents in the literature. An important advantage of our adsorbent is that the GO@CS can remove 82.1% of the real sample color within 135 min.

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“…[13] The adsorption process is inexpensive and simple to construct, with a high purification rate and low energy usage. [14,15] Various adsorbents used in the adsorption of aqueous methyl orange are layer double hydroxides, [16,17] chitosan, [18,19] activated carbon, [20] ionic liquid-modified graphene oxide, [21] graphene oxide-chitosan composite aerogel, [22] and many others.…”

Section: Introductionmentioning

confidence: 99%

“…Various adsorbents used in the adsorption of aqueous methyl orange are layer double hydroxides, [ 16,17 ] chitosan, [ 18,19 ] activated carbon, [ 20 ] ionic liquid‐modified graphene oxide, [ 21 ] graphene oxide‐chitosan composite aerogel, [ 22 ] and many others.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of titanium phosphate/polypyrrole nanocomposites for removal of methyl orange from water

Gupta

Ben

2022

Polymer Composites

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In this paper, titanium (IV) phosphate (TiP), polypyrrole (PPy), and titanium (IV) phosphate-polypyrrole (TiP/PPy) nanocomposites were synthesized for adsorption of methyl orange (MO) dye from water. X-ray diffraction data showed the formation of pure samples with crystallite size 14.1 and 14.2 nm of TiP and TiP/PPy nanocomposite respectively. The specific surface area of TiP (77.127 m 2 g À1 ) was higher than PPy (17.004 m 2 g À1 ) and TiP/PPy nanocomposite (25.247 m 2 g À1 ). The equilibrium adsorption capacity (q e ) was found to be 9.801 and 30.69 mg g À1 for PPy and TiP/PPy nanocomposite respectively. The Langmuir model was successfully fitted, and the TiP/PPy nanocomposite (69.4 mg g À1 ) had a greater maximum adsorption capacity (q m ) than PPy (51.9 mg g À1 ). The MO adsorption removal efficiency was dependent on the pH of the solution and was found to be 86.7% and 30.7% for TiP/PPy nanocomposite and PPy respectively at pH 4. Thermodynamics studied confirmed the spontaneous and exothermic nature of the adsorption process. The presence of common ions decreased MO adsorption capacity and the maximum decrease was found for sodium carbonate. Electrostatic interaction, π-π stacking, and hydrogen bonding were responsible for adsorption of MO dye on the TiP/PPy nanocomposite and PPy.

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Graphene oxide-chitosan composite aerogel for adsorption of methyl orange and methylene blue: Effect of pH in single and binary systems

Cited by 67 publications

References 74 publications

Effective Removal of Tetracycline from Water Using Copper Alginate @ Graphene Oxide with In-Situ Grown MOF-525 Composite: Synthesis, Characterization and Adsorption Mechanisms

Effective Removal of Tetracycline from Water Using Copper Alginate @ Graphene Oxide with In-Situ Grown MOF-525 Composite: Synthesis, Characterization and Adsorption Mechanisms

Chitosan-Functionalized-Graphene Oxide (GO@CS) Beads as an Effective Adsorbent to Remove Cationic Dye from Wastewater

Synthesis of titanium phosphate/polypyrrole nanocomposites for removal of methyl orange from water

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