Novel magnetic chitosan/quaternary ammonium salt graphene oxide composite applied to dye removal

Neves, Tauany de Figueiredo; Dalarme, Nicole Barticiotto; Silva, Paula Mayara Morais da; Landers, Richard; Picone, Carolina Siqueira Franco; Prediger, Patrícia

doi:10.1016/j.jece.2020.103820

Cited by 58 publications

(25 citation statements)

References 84 publications

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“…Nanoporous materials own large specific surface areas and pore volume and various functional sites. Therefore, they are considered efficient adsorbents to eliminate different azo dyes from polluted water. , Graphene and its related contents are usually used as typical adsorbents to separate azo dyes from wastewater. − However, the transformation and toxicological impacts of graphene-based materials in the environment are higher, related to corrosive substances (e.g., toxic chemicals) and very low production efficiency. − Recently, nanoporous SiO 2 hydrogels with amphiphilic functionalities have attracted considerable attention in wastewater treatment due to large specific surface areas, excellent recycling properties, and low manufacturing cost . These amphiphilic SiO 2 hydrogels are three-dimensional cross-linked polymeric materials that can efficiently adsorb nonpolar molecules and simultaneously disperse in the aqueous medium.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of a Nanoporous Silica Hydrogel by Cross-Linking of SiO₂–H₃BO₃–Hexadecyltrimethoxysilane for Excellent Adsorption of Azo Dyes from Wastewater

Lahiri

Liu

2021

Langmuir

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This study reports a novel cross-linking approach to fabricate the hydrothermally neutralized silica hydrogel of SiO2–H3BO3–hexadecyltrimethoxysilane by grafting alkylsilane groups onto the nanoporous silica. The synthesized silica hydrogel possessed a large specific surface area of 51.3 m2g–1 and showed excellent dye adsorption capability of cationic dyes in neutral (pH 7) and alkaline (pH 9) medium from wastewater. The colloidal electrokinetic potential analysis revealed that the outstanding adsorption efficiency of cationic dyes over anionic dyes strongly relies on the surface charge of the hydrogels. Moreover, the hydrophobic interactions between the dye molecules and the hydrogels were studied, and it was found that the dye adsorption performance can be tuned by altering the concentration of hydrophobic reagents of the hydrogel. The dye adsorption mechanism was established, and the kinetic study suggested that the adsorption is a pseudo-second-order reaction. Adsorption isotherms at various equilibrium conditions fitted well with the Langmuir isotherm. Therefore, this strongly supports the promising and practical application of the prepared silica hydrogel. The recyclability of the hydrogel was studied, and it showed 90% adsorption efficiency by the regenerated gel up to 6 cycles, which has a high potential in wastewater treatment.

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Section: Introductionmentioning

confidence: 99%

Fabrication of a Nanoporous Silica Hydrogel by Cross-Linking of SiO₂–H₃BO₃–Hexadecyltrimethoxysilane for Excellent Adsorption of Azo Dyes from Wastewater

Lahiri

Liu

2021

Langmuir

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“…The studies reported the adsorption efficiency of 10% weight of GO in CS/Fe3O4/GO nanocomposite for MB dye after 95 h for five repeated operation cycles. Neves et al (2020) prepared a magnetic CS-GO composite to remove basic brown four dye.…”

Section: Removal Of Dyementioning

confidence: 99%

Chitosan and graphene oxide-based nanocomposites for water purification and medical applications: A review

Khandegar

Kaur

Chanana

2021

BioRes

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Chitosan (CS) is a natural polysaccharide isolated from insects, molluscs, and fungi. The specific properties of chitosan can be enhanced using physicochemical processes. The composites prepared using CS and graphene oxide (GO) contain active functional groups such as epoxide, carboxyl, and hydroxyl, which possess excellent biocompatibility, high adsorption capacity, and biodegradability. Their low cost and ease of scale-up make them employable for multiple applications in water-treatment plants, electronics, solar cells, and pharmaceuticals. This review provides an overview of sources, types, and properties of chitin, chitosan, and graphene oxide. The use of these composites for the preparation of anti-microbial drugs has been discussed here. The article also explores the applicability of such composites for removal of heavy metals (lead, copper, chromium, cobalt, mercury, etc.), dyes (methylene blue and other reactive dyes), and organic and inorganic contaminants (ofloxacin, naphthanol, phenol, and oil, etc.). The article highlights various knowledge gaps in the field and the scope of future work.

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“…(2016) . Among recent developments, mention can also be made of a covalently bonded metal organic framework (Cu 3 (btc) 2 ) on a graphene oxide–chitosan composite, magnetic chitosan/quaternary ammonium salt GO, and magnetite-polypyrene/chitosan/graphene oxide (M-PPy/CS/GO) …”

Section: Fabrication Of Polysaccharide Go Nanocompositesmentioning

confidence: 99%

“…This leads to adsorption of anionic dyes on the surface. ,, On the contrary, in alkaline medium in which the pH is high, these functional groups may undergo deprotonation contributing to a net negative charge on the adsorbent surface. This in turn encourages the selective adsorption of cationic dyes. , In addition, π–π interactions play a significant role in the adsorption process as the conjugated π system present in the molecular structure of most of the dyes becomes involved in π–π interactions with the GO nanosheets of the adsorbent. Figure depicts a concise mechanism of interaction between cationic or anionic dyes with the polysaccharide-based GO nanomaterial.…”

Section: Adsorption Mechanismmentioning

confidence: 99%

“…Very recently, a β-chitosan/ triethylenetetramine functionalized graphene oxide (CS/ TFGO) hybrid 175 has been reported wherein the solid−liquid separation problem after adsorption was solved following a procedure as described by Ren et al (2016). 176 Among recent developments, mention can also be made of a covalently bonded metal organic framework (Cu 3 (btc) 2 ) on a graphene oxide−chitosan composite, 177 magnetic chitosan/quaternary ammonium salt GO, 178 and magnetite-polypyrene/chitosan/ graphene oxide (M-PPy/CS/GO). 179 4.6.…”

Section: Fabrication Of Polysaccharide Go Nanocompositesmentioning

confidence: 99%

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Natural Polysaccharide Based Graphene Oxide Nanocomposites for Removal of Dyes from Wastewater: A Review

et al. 2020

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This article discusses the potential applications of natural polysaccharide-based graphene oxide nanomaterials in the field of wastewater remediation through the removal of organic and synthetic dyes. Being highly toxic, carcinogenic, and nonbiodegradable, dyes disposed from textile, paper, and printing industries etc. pose a serious threat to various life forms on earth. Recently, there has been an increased interest in the amalgamation of biopolymers, such as polysaccharides, with the high adsorption efficiency of graphene oxide. Polysaccharides, apart from being nontoxic, low cost, and eco-friendly, possess a variety of functional groups enabling them to be easily tuned for the desired applications. When grafted with GO nanosheets, they give rise to unique nanomaterials possessing diverse applications, especially in the eradication of harmful contaminants from wastewater. This review is an attempt to give consolidated and detailed information on different aspects of the adsorption behavior of various potentially low-cost polysaccharide-based GO nanoadsorbents toward lethal dyes. The characterization techniques used, adsorption isotherms, kinetics, thermodynamic behavior, recyclability, and swelling properties as well as the adsorption mechanism have been outlined in this article. The whole anthology of literature reports excellent dye removal efficiency with significant regeneration performance making these nanoadsorbents promising candidates for practical applications. In view of all aspects, this review recommends the use of such sustainable adsorbents with a further search toward obtaining the polysaccharides from natural wastes.

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Novel magnetic chitosan/quaternary ammonium salt graphene oxide composite applied to dye removal

Cited by 58 publications

References 84 publications

Fabrication of a Nanoporous Silica Hydrogel by Cross-Linking of SiO₂–H₃BO₃–Hexadecyltrimethoxysilane for Excellent Adsorption of Azo Dyes from Wastewater

Fabrication of a Nanoporous Silica Hydrogel by Cross-Linking of SiO₂–H₃BO₃–Hexadecyltrimethoxysilane for Excellent Adsorption of Azo Dyes from Wastewater

Chitosan and graphene oxide-based nanocomposites for water purification and medical applications: A review

Natural Polysaccharide Based Graphene Oxide Nanocomposites for Removal of Dyes from Wastewater: A Review

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Novel magnetic chitosan/quaternary ammonium salt graphene oxide composite applied to dye removal

Cited by 58 publications

References 84 publications

Fabrication of a Nanoporous Silica Hydrogel by Cross-Linking of SiO2–H3BO3–Hexadecyltrimethoxysilane for Excellent Adsorption of Azo Dyes from Wastewater

Fabrication of a Nanoporous Silica Hydrogel by Cross-Linking of SiO2–H3BO3–Hexadecyltrimethoxysilane for Excellent Adsorption of Azo Dyes from Wastewater

Chitosan and graphene oxide-based nanocomposites for water purification and medical applications: A review

Natural Polysaccharide Based Graphene Oxide Nanocomposites for Removal of Dyes from Wastewater: A Review

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Fabrication of a Nanoporous Silica Hydrogel by Cross-Linking of SiO₂–H₃BO₃–Hexadecyltrimethoxysilane for Excellent Adsorption of Azo Dyes from Wastewater

Fabrication of a Nanoporous Silica Hydrogel by Cross-Linking of SiO₂–H₃BO₃–Hexadecyltrimethoxysilane for Excellent Adsorption of Azo Dyes from Wastewater