Gallic acid-functionalized graphene hydrogel as adsorbent for removal of chromium (<scp>iii</scp>) and organic dye pollutants from tannery wastewater

Liu, Gongyan; Yu, Ruiquan; Lan, Tianxiang; Liu, Zheng; Zhang, Peng; Liang, Ruifeng

doi:10.1039/c9ra05664e

Cited by 37 publications

(20 citation statements)

References 47 publications

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“…Electrostatic interactions are the principle noncovalent interactions for the adsorption of charged organic dyes. Cationic organic dyes were generally adsorped via negatively charged functional groups in the hydrogel (Figure a), including the carboxyl group −COO – , ,,− electronegative phenolic group, , negatively charged montmorillonite (MMT), sulfonic group −SO 3 – , , and negatively charged ionic liquids (1-butyl-3-methylimidazolium bromide (BmImBr)) . These negatively charged groups-containing materials such as PAA, 2-acrylamido-2-methyl-1-propanesulfonic acid (AMPSA), alginate, polydopamine, and tannins are easily accessible for the fabrication of hydrogel adsorbents to remove cationic organic dyes.…”

Section: Building Functional Soft Materials Via Tunable Noncovalent I...mentioning

confidence: 99%

“…Metal–ligand coordination has been demonstrated as the dominant noncovalent interaction for the adsorption of heavy metal cations. Common ligands generally involve carboxyl group −COOH, ,,− ,− hydroxyl group −OH, ,− ,− amino group −NH 2 , ,,,,− and sulfonic group −SO 3 H , as well as nitrogen-containing −NHCOCH 3 and C=N groups, etc. (Figure c).…”

Section: Building Functional Soft Materials Via Tunable Noncovalent I...mentioning

confidence: 99%

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Probing and Manipulating Noncovalent Interactions in Functional Polymeric Systems

et al. 2022

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Noncovalent interactions, which usually feature tunable strength, reversibility, and environmental adaptability, have been recognized as driving forces in a variety of biological and chemical processes, contributing to the recognition between molecules, the formation of molecule clusters, and the establishment of complex structures of macromolecules. The marriage of noncovalent interactions and conventional covalent polymers offers the systems novel mechanical, physicochemical, and biological properties, which are highly dependent on the binding mechanisms of the noncovalent interactions that can be illuminated via quantification. This review systematically discusses the nanomechanical characterization of typical noncovalent interactions in polymeric systems, mainly through direct force measurements at microscopic, nanoscopic, and molecular levels, which provide quantitative information (e.g., ranges, strengths, and dynamics) on the binding behaviors. The fundamental understandings of intermolecular and interfacial interactions are then correlated to the macroscopic performances of a series of noncovalently bonded polymers, whose functions (e.g., stimuli-responsiveness, self-healing capacity, universal adhesiveness) can be customized through the manipulation of the noncovalent interactions, providing insights into the rational design of advanced materials with applications in biomedical, energy, environmental, and other engineering fields.

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Section: Building Functional Soft Materials Via Tunable Noncovalent I...mentioning

confidence: 99%

Section: Building Functional Soft Materials Via Tunable Noncovalent I...mentioning

confidence: 99%

Probing and Manipulating Noncovalent Interactions in Functional Polymeric Systems

et al. 2022

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“…In addition, modi ed GA on graphene sheets with benzene group also improves adsorption of organic dyes. This adsorption is due to the π-π interactions between GA-GH and aromatic dyes (Liu et al, 2019).…”

Section: Shrinkage Temperature Of the Tanned Leathermentioning

confidence: 99%

Sustainable chrome tanning system using protein-based product developed from leather waste: wealth from waste

2022

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Chrome tanning is one of the popular tanning methods followed globally that generates considerable level of chromium pollution in the resulting e uent. The existing conventional chrome tanning system has to be modi ed to increase the exhaustion level of chromium in the tanning process. In the present investigation, a protein based product has been developed from raw trimming wastes and applied in chrome tanning process to enhance the exhaustion level of chromium. The experiment conducted using the product at the level of 6% exhibited chromium exhaustion at the level of 93% in the process. FT-IR analysis revealed the presence of peaks for various functional groups namely carboxylic acids, aldehyde, amide and hydroxyl groups for the high exhaust chrome tanning. The shrinkage temperature of the experimental leather was found to be more than 100 o C. Results of microscopic studies from SEM-EDX revealed that enhanced adsorption of chromium up to a level of 5.24 weight % containing chromium with atomic % 1.27 in the sample of 6% co-polymer. AFM images also show increase in adsorption of chromium with increased amount of co-polymer in the solution. Increased interactions between active sites of collagen-complex and chromium resulted into improved exhaustion of chromium as revealed from higher intensities of XRD images. CD spectra revealed that the addition of protein based product increased the ellipticity of the collagen in the experimental sample as compared to control sample. The crust leather showed improved colour, organoleptic and comparable strength properties of the experimental leather.

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“…The mixture of GQDs and TA led to a new absorption band in the UV-Vis spectra due to the hydrogen bonding with the surface oxygen functional groups and π-π stacking interaction between aromatic groups of both On the other hand, a few papers have been reported on the use of GA for the development of sensors for the detection of other ions. For instance, Liu et al [177] prepared a 3D-porous graphene-based hydrogel with good mechanical strength and large surface area, fabricated by self-assembly of GO sheets reduced and modified by GA through π-π interactions, to capture toxic Cr(III) ions generated by tannery wastewater. This GA-modified hydrogel is able to capture the Cr(III) by coordination complexation with its deprotonated carboxylic groups at pH around 4.0, with an average of nearly 97% of Cr(III) in 20 min.…”

Section: Tannic Acidmentioning

confidence: 99%

Graphene-Based Sensors for the Detection of Bioactive Compounds: A Review

Sainz-Urruela

Vera

Andrés

et al. 2021

IJMS

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Over the last years, different nanomaterials have been investigated to design highly selective and sensitive sensors, reaching nano/picomolar concentrations of biomolecules, which is crucial for medical sciences and the healthcare industry in order to assess physiological and metabolic parameters. The discovery of graphene (G) has unexpectedly impulsed research on developing cost-effective electrode materials owed to its unique physical and chemical properties, including high specific surface area, elevated carrier mobility, exceptional electrical and thermal conductivity, strong stiffness and strength combined with flexibility and optical transparency. G and its derivatives, including graphene oxide (GO) and reduced graphene oxide (rGO), are becoming an important class of nanomaterials in the area of optical and electrochemical sensors. The presence of oxygenated functional groups makes GO nanosheets amphiphilic, facilitating chemical functionalization. G-based nanomaterials can be easily combined with different types of inorganic nanoparticles, including metals and metal oxides, quantum dots, organic polymers, and biomolecules, to yield a wide range of nanocomposites with enhanced sensitivity for sensor applications. This review provides an overview of recent research on G-based nanocomposites for the detection of bioactive compounds, providing insights on the unique advantages offered by G and its derivatives. Their synthesis process, functionalization routes, and main properties are summarized, and the main challenges are also discussed. The antioxidants selected for this review are melatonin, gallic acid, tannic acid, resveratrol, oleuropein, hydroxytyrosol, tocopherol, ascorbic acid, and curcumin. They were chosen owed to their beneficial properties for human health, including antibiotic, antiviral, cardiovascular protector, anticancer, anti-inflammatory, cytoprotective, neuroprotective, antiageing, antidegenerative, and antiallergic capacity. The sensitivity and selectivity of G-based electrochemical and fluorescent sensors are also examined. Finally, the future outlook for the development of G-based sensors for this type of biocompounds is outlined.

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Gallic acid-functionalized graphene hydrogel as adsorbent for removal of chromium (iii) and organic dye pollutants from tannery wastewater

Abstract: The formation process of gallic acid functionalized graphene hydrogel (GA-GH).

Cited by 37 publications

References 47 publications

Probing and Manipulating Noncovalent Interactions in Functional Polymeric Systems

Probing and Manipulating Noncovalent Interactions in Functional Polymeric Systems

Sustainable chrome tanning system using protein-based product developed from leather waste: wealth from waste

Graphene-Based Sensors for the Detection of Bioactive Compounds: A Review

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