Carbon quantum dots functionalized agarose gel matrix for in solution detection of nonylphenol

Singh, Sanju; Nigam, Preeti; Pednekar, Aisha; Mukherjee, Souvik; Mishra, Abhishek

doi:10.1080/09593330.2018.1498133

Cited by 19 publications

(5 citation statements)

References 21 publications

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“…Interestingly, in the present study, the CQDs show more inhibition toward Bacillus cereus, Staphylococcus aureus, Pseudomonas aeruginosa, Vibrio cholera, and Escherichia coli, and their antibacterial activity is compared with those of other CQDs (Table ). − Therefore, the synthesized CQDs can be used for pharmaceutical applications.…”

Section: Resultsmentioning

confidence: 99%

Biocompatible Carbon Quantum Dots Derived from Sugarcane Industrial Wastes for Effective Nonlinear Optical Behavior and Antimicrobial Activity Applications

et al. 2020

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In this work, the green synthesis of highly fluorescent carbon quantum dots (CQDs) with an efficient quantum yield of 17.98% using sugarcane bagasse pulp as the precursor was conducted by a hydrothermal technique. The high-resolution transmission electron microscopy analysis revealed that the CQDs were competently monodispersed with the particle size ranging between 0.75 and 2.75 nm. The structural properties of CQDs were investigated using X-ray diffraction, Fourier transform infrared, and X-ray photoelectron spectroscopy analyses. The UV–visible spectrum showed two absorption peaks due to the aromatic CC transitions of π–π* and CO transitions of n−π*. The fluorescence spectrum of CQDs displayed a strong blue emission. However, the first-ever of its kind, sugarcane industrial solid waste carbon quantum dots caused significant orders to obey the enhancement of the third-order nonlinearity (χ(3)) when compared with other carbon dots (CDs). The calculated nonlinear optical (NLO) parameters such as n 2, β, and χ(3) were 1.012 × 10–8 cm2/W, 2.513 × 10–4, and 3.939 × 10–7 esu, respectively. The figures of merit were evaluated to be W = 6.6661 and T = 0.0132, which greatly fulfilled the optical switching conditions. Besides, the antibacterial activities of CQDs were screened against aquatic Gram-positive (Benthesicymus cereus and Staphylococcus aureus) and Gram-negative (Pseudomonas aeruginosa, Vibrio cholerae, and Escherichia coli) microbial organisms. Our findings, however, indicate that synergistic sugarcane industrial waste CQDs are promising materials for the functioning of NLO devices, bioimaging, and pharmaceutical applications.

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Section: Resultsmentioning

confidence: 99%

Biocompatible Carbon Quantum Dots Derived from Sugarcane Industrial Wastes for Effective Nonlinear Optical Behavior and Antimicrobial Activity Applications

et al. 2020

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“…To construct functional agarose gels using N2-CQDs, gels with a 2.5% agarose content were prepared [29], along with a solution of N2-CQDs at a concentration of 100 µg/mL (w/v). Next, the prepared gels (6×2×0.5 cm) were immersed in seawater containing a range of CuSO 4 concentrations (each 50 mL solution in a 500 mL glass beaker) and rotated at 50 rpm for 3 or 5 minutes.…”

Section: Cu 2+ Removing Performance Of Agarose Gels Containing N2-cqdsmentioning

confidence: 99%

Green synthesis of carbon quantum dots from Phragmites communis and its protective effect on Artemia salina under copper stress

Gang,

Li,

Lei

et al. 2024

Preprint

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Carbon quantum dots (CQD) and Nitrogen-doped CQDs (N-CQDs) were synthesized through a one-step hydrothermal process, utilizing reed leaves and urea as carbon and nitrogen sources, respectively. The maximum excitation wavelength of CQDs and N2-CQDs was 325 nm, and the corresponding emission wavelength was 407 nm and 406 nm, respectively. Synthetic CQDs have excellent fluorescence properties, while N-doping enhances the fluorescence intensity and stability of CQDs. Next, the adsorption effect of N2-CQDs on various metal ions was also studied using the fluorescence quenching method. The results showed that N2-CQDs have a significant capacity for adsorption of Cu2+ ions. The following quantitative analysis indicated that the Cu2+ concentration showed an excellent linear relationship between 0 ~ 500 µmol/L and the limit of detection (LOD) was 0.074 µmol/L. The N2-CQDs at 0-200 µg/mL have no deleterious effects on the viability of HeLa cells and the survival rate of Artemia nauplii. Finally, the agarose gel containing N2-CQDs was constructed, and its absorption behavior of Cu2+ in artificial seawater was evaluated. The results showed that this N2-CQDs-based gel was able to efficiently remove Cu2+ from seawater, leading to a higher survival rate of the nauplii under 10 and 50 mg/L Cu2+ stress. Our results collectively provide a cost-effective method for removing heavy metal ions from seawater and mitigating their harmful effects on sea animals.

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“…In addition to red and brown algae, green algae from the genus Ulva have been proposed as a carbon-rich source for developing CQDs. Singh et al (2018) used U. lactuca , an ulvan-rich polysaccharide source, to obtain CQDs through a carbonization process [ 64 ]. The quantum yield of the synthesized CQDs achieved an increase of up to 68% and showed a spherical shape in the range of 20–40 nm.…”

Section: Marine Polysaccharides Precursors For the Synthesis Of Cqdsmentioning

confidence: 99%

Carbon Quantum Dots Based on Marine Polysaccharides: Types, Synthesis, and Applications

et al. 2023

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The marine environment offers a vast array of resources, including plants, animals, and microorganisms, that can be utilized to extract polysaccharides such as alginate, carrageenan, chitin, chitosan, agarose, ulvan, porphyra, and many more. These polysaccharides found in marine environments can serve as carbon-rich precursors for synthesizing carbon quantum dots (CQDs). Marine polysaccharides have a distinct advantage over other CQD precursors because they contain multiple heteroatoms, including nitrogen (N), sulfur (S), and oxygen (O). The surface of CQDs can be naturally doped, reducing the need for excessive use of chemical reagents and promoting green methods. The present review highlights the processing methods used to synthesize CQDs from marine polysaccharide precursors. These can be classified according to their biological origin as being derived from algae, crustaceans, or fish. CQDs can be synthesized to exhibit exceptional optical properties, including high fluorescence emission, absorbance, quenching, and quantum yield. CQDs’ structural, morphological, and optical properties can be adjusted by utilizing multi-heteroatom precursors. Moreover, owing to their biocompatibility and low toxicity, CQDs obtained from marine polysaccharides have potential applications in various fields, including biomedicine (e.g., drug delivery, bioimaging, and biosensing), photocatalysis, water quality monitoring, and the food industry. Using marine polysaccharides to produce carbon quantum dots (CQDs) enables the transformation of renewable sources into a cutting-edge technological product. This review can provide fundamental insights for the development of novel nanomaterials derived from natural marine sources.

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Carbon quantum dots functionalized agarose gel matrix for in solution detection of nonylphenol

Cited by 19 publications

References 21 publications

Biocompatible Carbon Quantum Dots Derived from Sugarcane Industrial Wastes for Effective Nonlinear Optical Behavior and Antimicrobial Activity Applications

Biocompatible Carbon Quantum Dots Derived from Sugarcane Industrial Wastes for Effective Nonlinear Optical Behavior and Antimicrobial Activity Applications

Green synthesis of carbon quantum dots from Phragmites communis and its protective effect on Artemia salina under copper stress

Carbon Quantum Dots Based on Marine Polysaccharides: Types, Synthesis, and Applications

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