Highly sensitive and selective detection of mercury ions using N, S-codoped graphene quantum dots and its paper strip based sensing application in wastewater

Ánh, Nguyễn Thị Ngọc; Chowdhury, Ankan Dutta; Doong, Ruey‐an

doi:10.1016/j.snb.2017.07.177

Cited by 142 publications

(92 citation statements)

References 51 publications

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“…Water contaminants, often associated with industrial pollution, include toxic heavy metal ions such as lead, mercury, cadmium and copper. These metals can have severe and persistent effects on the neurological, reproductive, gastrointestinal, endocrine and immune systems of those who have been exposed. Therefore, the efficient remediation of these toxins from drinking water is of great importance to the global community.…”

Section: Introductionmentioning

confidence: 99%

A biopolymer‐based 3D printable hydrogel for toxic metal adsorption from water

Appuhamillage

Berry

Benjamin

et al. 2019

Polymer International

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Herein, we describe a 3D printable hydrogel that is capable of removing toxic metal pollutants from aqueous solution. To achieve this, shear‐thinning hydrogels were prepared by blending chitosan with diacrylated Pluronic F‐127 which allows for UV curing after printing. Several hydrogel compositions were tested for their ability to absorb common metal pollutants such as lead, copper, cadmium and mercury, as well as for their printability. These hydrogels displayed excellent metal adsorption with some examples capable of up to 95% metal removal within 30 min. We show that 3D printed hydrogel structures that would be difficult to fabricate by conventional manufacturing methods can adsorb metal ions significantly faster than solid objects, owing to their higher accessible surface areas. © 2019 Society of Chemical Industry

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Section: Introductionmentioning

confidence: 99%

A biopolymer‐based 3D printable hydrogel for toxic metal adsorption from water

Appuhamillage

Berry

Benjamin

et al. 2019

Polymer International

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“…The next most doped heteroatom into GQDs is sulfur with many applications for these materials as luminescent metal ion sensors . Again, the abundance of sulfur containing precursor compounds has facilitated the synthesis of S‐doped GQDs.…”

Section: Synthesis and Chemical Functionality Of Gqdsmentioning

confidence: 99%

A Practical Guide to Prepare and Synthetically Modify Graphene Quantum Dots

Sweetman

Hickey

Brooks

et al. 2019

Adv Funct Materials

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Due to the favorable properties of graphene quantum dots (GQDs), there has been a rapid development of sensors, devices, and composite materials, which incorporate this 0D nanomaterial. GQDs provide a means to instill superior optical, electronic, mechanical, and adsorptive properties to various platforms and have found use as biosensors, photovoltaic devices, polymer composites, and drug delivery vehicles. One of the key factors to successfully integrating GQD technology is the intelligent choice of synthetic chemical pathways to fabricate, modify, and instill functionality in the developed platform. GQDs are decorated with a variety of functional groups that are amenable to traditional synthetic chemistry transformations; however, the technology for post-synthetic modifications is only in its infancy. Herein, a comprehensive analysis of the chemistry available for modifying GQDs is provided; starting from methods for GQD fabrication and synthetic chemical pathways for producing functional GQDs, to the advantages, disadvantages, and challenges of specific chemistries, and finally techniques for the appropriate characterization of these functional materials. This review is meant for researchers considering entering the GQD field, as well as those more experienced, providing a practical guide on how to prepare, modify, and characterize GQDs for a broad range of applications.

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“…Contamination by heavy metal ions (As 2+ , Hg 2+ , Cd 2+ and Pb 2+ etc.) is one of the most serious problems for the environment due to excessive illegal discharge of metal ions from untreated wastewater from industrial, agricultural, and domestic effluents …”

Section: Introductionmentioning

confidence: 99%

“…Therefore, the efficient and sensitive detection of Hg ions is of prominent significance. Recently, a wide variety of analytical methods for Hg 2+ detection has been exploited based on a large body of studies and reports . Compared with many detection methods for heavy metal ions such as atomic absorption/emission spectroscopy (AAS/AES), mass spectroscopy (MS), inductively coupled plasma mass spectrometry (ICP‐MS), cold vapour atomic fluorescence spectrometry (CV‐AFS), ultraviolet–visible (UV–vis) light spectroscopy, X‐ray fluorescence spectroscopy, and potentiometric methods, the development of colorimetric anion sensing is particularly challenging.…”

Section: Introductionmentioning

confidence: 99%

A triazole‐based fluorescence probe for detecting Hg²⁺ ions and its biological application

Liu

Ding

et al. 2019

Luminescence

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A new compound, ethyl 5-phenyl-2-(p-tolyl)-2H-1,2,3-triazole-4-carboxylate was successfully introduced and synthesized as a novel rhodamine B derivative named REPPC, and characterized by 1 H nuclear magnetic resonance (NMR), 13 C NMR, and high resolution mass spectrometry (HRMS). It showed an obvious fluorescence and UV-visible light absorption enhancement towards Hg 2+ ion without interference from common metal ions in N,N-dimethylformamide-H 2 O (pH 7.4). The spirolactam ring moiety of rhodamine in REPPC was converted to the open-ring form generating a 1:1 complex with the intervention of a mercury ion, verified by electrospray ionization-mass spectroscopy testing and density functional theory calculation.REPPC was used to visualize the level of mercury ions in living HeLa cells with encouraging results. KEYWORDSbinding mechanism, bio-imaging, ethyl 5-phenyl-2-(p-tolyl)-2H-1,2,3-triazole-4-carboxylate, mercury ion As shown in Scheme 1, first rhodamine B hydrazide 1 was synthesized according to a reported procedure. [15] Next, 20 ml of ethanol was used SCHEME 1 Synthesis route of REPPC. 130LIU ET AL. 0 3 shows the corresponding colour photograph for REPPC in the presence of different metal ions. There was a 615-fold increase in fluorescence signal at 577 nm for the REPPC-Hg 2+ system; this result suggested that REPPC can be used as a sensor to detect Hg 2+ using FIGURE 1 Effect of pH on the fluorescence signal of REPPC and the REPPC-mercury complex 132 LIU ET AL.

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Highly sensitive and selective detection of mercury ions using N, S-codoped graphene quantum dots and its paper strip based sensing application in wastewater

Cited by 142 publications

References 51 publications

A biopolymer‐based 3D printable hydrogel for toxic metal adsorption from water

A biopolymer‐based 3D printable hydrogel for toxic metal adsorption from water

A Practical Guide to Prepare and Synthetically Modify Graphene Quantum Dots

A triazole‐based fluorescence probe for detecting Hg²⁺ ions and its biological application

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Highly sensitive and selective detection of mercury ions using N, S-codoped graphene quantum dots and its paper strip based sensing application in wastewater

Cited by 142 publications

References 51 publications

A biopolymer‐based 3D printable hydrogel for toxic metal adsorption from water

A biopolymer‐based 3D printable hydrogel for toxic metal adsorption from water

A Practical Guide to Prepare and Synthetically Modify Graphene Quantum Dots

A triazole‐based fluorescence probe for detecting Hg2+ ions and its biological application

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Product

Resources

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A triazole‐based fluorescence probe for detecting Hg²⁺ ions and its biological application