Barbituric acid derived covalent organic framework and its CNT composite as high-performance adsorbents for organic dye removal

Thakkar, Harshil; Bhatt, Monark; Thakore, Sonal

doi:10.1016/j.jece.2023.109890

Cited by 18 publications

(4 citation statements)

References 36 publications

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“…The % R e of greater than 90% even at 200 mg L –1 indicates the superior adsorption performance of the hydrogel. The enhanced mass gradient between the CDG and the incoming Fe(III) facilitates the rapid uptake of Fe(III) onto the CDG surface . The decrease in % R e with increasing concentration is due to the decrease in the ratio of the adsorption sites compared to the number of Fe(III) ions.…”

Section: Resultsmentioning

confidence: 99%

“…The enhanced mass gradient between the CDG and the incoming Fe(III) facilitates the rapid uptake of Fe(III) onto the CDG surface. 42 The decrease in % R e with increasing concentration is due to the decrease in the ratio of the adsorption sites compared to the number of Fe(III) ions. The electrostatic repulsion between the incoming Fe(III) and adsorbed ones may also lead to the same result.…”

Section: Effect Of Adsorption Parametersmentioning

confidence: 99%

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Biogenic Carbon Dot-Embedded Chitosan Hydrogels as a Two-Stage Fluorescence OFF–ON Probe for Sequential and Ratiometric Detection of Fe(III) and Glutathione

Thakkar,

Bhandary,

Thakore

2023

ACS Appl. Nano Mater.

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Biogenic carbon dots (BCDs) are useful fluorescence sensors for selective detection of toxic metals. In the present work, we propose to synthesize a hybrid fluorescent chitosan gel using BCDs for detection and enrichment of Fe(III) ions and subsequent ratiometric detection of glutathione (GSH). Carbon dots were synthesized using waste lemon peels (LCDs) as the precursor. The sensing studies showed the selectivity and ultrasensitivity of the LCD sensor toward Fe(III) in the presence of other metal ions with a limit of detection as low as 17 pM. The visual as well as PL studies demonstrated that the LCD sensing probe is free from any significant interference. The LCDs were successfully fabricated to develop “in-house” paper-based kits for in situ and on-site detection of Fe(III). Further, a fluorescent chitosan-based hydrogel (CDG) was synthesized by conjugation of LCDs for the selective uptake and enrichment of Fe(III), which led to quenching of fluorescence with >90% encapsulation. Post enrichment, the Fe(III) enriched LCD hybrid hydrogel (Fe@CDG) was further applied for the selective and ultrasensitive detection of GSH with the limit of detection of 15.22 pM. The sensing studies showed that the detection of GSH is free from any interference. Thus, the fluorescent hydrogel exhibited quenching on entrapment of Fe(III) (Turn OFF) and recurrence of fluorescence on the release of entrapped Fe(III) in the presence of GSH (Turn ON). Additionally, LCDs and the CDG demonstrated potential antibacterial activity, annihilating bacteria in water samples in less than 10 min of photoexcitation, due to the potential ROS generation ability of the LCDs.

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Section: Resultsmentioning

confidence: 99%

Section: Effect Of Adsorption Parametersmentioning

confidence: 99%

Biogenic Carbon Dot-Embedded Chitosan Hydrogels as a Two-Stage Fluorescence OFF–ON Probe for Sequential and Ratiometric Detection of Fe(III) and Glutathione

Thakkar,

Bhandary,

Thakore

2023

ACS Appl. Nano Mater.

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“…26,27 Most recently, Thakkar et al used this compound to create a composite with carbon nanotubes for efficient and selective organic dye removal. 28 The authors also note that melamine barbiturate is a 3D covalent organic framework.…”

Section: Introductionmentioning

confidence: 99%

Salts of barbituric and 2-thiobarbituric acids with imidazole: polymorphism, supramolecular structure, thermal stability and water solubility

Lakeev,

Sukhikh,

Kurzina

et al. 2023

New J. Chem.

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“…Membrane or nano-filtration can be costly to manufacture, energy-intensive, and require frequent filter replacement due to pore clogging, necessitating pressure for filtration [ 11 , 12 , 13 ]. Of these methods, adsorption is the most widely used industrially, with ongoing research into various dye adsorbents, including activated carbon [ 14 ], lignin-based products [ 15 , 16 , 17 ], chitosan [ 18 , 19 ], cellulose-based beads [ 20 ], Metal–Organic Framework (MOF) [ 21 , 22 , 23 , 24 ], and other thermopolymerized composites [ 25 , 26 ].…”

Section: Introductionmentioning

confidence: 99%

Highly Sustainable Dyes Adsorption in Wastewater Using Textile Filters Fabricated by UV Irradiation

Ryu,

Park,

Shim

et al. 2023

Polymers

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Vast amounts of dyeing wastewater released from the textile industry can not only cause water pollution but also have negative effects on the human body, such as skin irritation and respiratory diseases. Dye adsorption technology is necessary for the treatment of wastewater discharged from the dyeing industry and for environmental improvement. However, to remove dyeing wastewater, more energy and solvents are used to fabricate adsorbents, or excessive energy is used to filter dyeing wastewater out, resulting in more environmental pollution. Therefore, it is necessary to develop a method of filtering dyeing wastewater in a more environmentally friendly manner by minimizing the use of solvents and energy. In this study, we modified the surface of a textile substrate through UV irradiation to create a monomer capable of facilely bonding with dyes. Employing the UV photografting method, we were able to produce a dye adsorption filter in a more environmentally friendly manner, minimizing solvent usage and heat energy consumption required for absorbent synthesis. At a monomer concentration of 10%, the fabricated filter exhibited a dye removal efficiency of 97.34% after 24 h, all without the need for a pressure treatment or temperature increase. Moreover, it displayed an adsorption capacity of approximately 77.88 mg per 1 g of filter material.

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Barbituric acid derived covalent organic framework and its CNT composite as high-performance adsorbents for organic dye removal

Cited by 18 publications

References 36 publications

Biogenic Carbon Dot-Embedded Chitosan Hydrogels as a Two-Stage Fluorescence OFF–ON Probe for Sequential and Ratiometric Detection of Fe(III) and Glutathione

Biogenic Carbon Dot-Embedded Chitosan Hydrogels as a Two-Stage Fluorescence OFF–ON Probe for Sequential and Ratiometric Detection of Fe(III) and Glutathione

Salts of barbituric and 2-thiobarbituric acids with imidazole: polymorphism, supramolecular structure, thermal stability and water solubility

Highly Sustainable Dyes Adsorption in Wastewater Using Textile Filters Fabricated by UV Irradiation

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