Green synthesis of glowing carbon dots from Carica papaya waste pulp and their application as a label-freechemo probe for chromium detection in water

Devi, Pooja; Singh, Lovepreet; Thakur, Anupma; Kumar, Praveen

doi:10.1016/j.snb.2018.12.027

Cited by 112 publications

(6 citation statements)

References 42 publications

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“…Wide applications of C-Dots in biomedical applications for instance drug delivery (D'souza et al, 2018), biosensing (Sarkar et al, 2018), bioimaging (Yang et al, 2014;Ren et al, 2018;Amjad et al, 2019) and gene transfer (Mohammadinejad et al, 2019), make it more suitable to move from chemical precursors to organic precursors. For example, numerous biomass has been used for the synthesis of C-Dots in recent years including papaya waste (Pooja et al, 2019), prawn shells (Gedda et al, 2016), grilled fish (Bi et al, 2017), Lycii Fructus (Sun et al, 2017), milk (Bajpai et al, 2019) fruit juices (Atchudan et al, 2018), etc. Nonetheless, various types of precursors may affect the properties of the resulting C-Dots due to variety composition in the samples .…”

Section: Green Synthesis Of Multifunctional C-dotsmentioning

confidence: 99%

A Review on Multifunctional Carbon-Dots Synthesized From Biomass Waste: Design/ Fabrication, Characterization and Applications

et al. 2021

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Carbon-Dots (C-Dots) have drawn much attention in recent years owing to their remarkable properties such as high biocompatibility, low toxicity, nano-scale size, and ease of modification with good tuneable photoluminescence performance. These unique properties have led C-Dots to become a promising platform for bioimaging, metal ion sensing and an antibacterial agent. C-Dots can be prepared using the top-down and bottom-up approaches, in which the latter method is commonly used for large scale and low-cost synthesis. C-Dots can be synthesized using sustainable raw materials or green biomass since it is environmentally friendly, in-expensive and most importantly, promotes the minimization of waste production. However, using biomass waste to produce high-quality C-Dots is still a matter of concern waiting for resolution, and this will be the main focus of this review. Fundamental understanding of C-Dots such as structure analysis, physical and chemical properties of C-Dots, various synthesis methodology and type of raw materials used are also discussed and correlated comprehensively. Additionally, factors affecting the bandgap of the C-Dots and the strategies to overcome these shortcomings are also covered. Moreover, formation mechanism of C-Dots focusing on the hydrothermal method, option and challenges to scale up the C-Dots production are explored. It is expected that the great potential of producing C-Dots from agricultural waste a key benefit in view of their versatility in a wide range of applications.

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Section: Green Synthesis Of Multifunctional C-dotsmentioning

confidence: 99%

A Review on Multifunctional Carbon-Dots Synthesized From Biomass Waste: Design/ Fabrication, Characterization and Applications

et al. 2021

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“…It is worth to mention that the allowable limit of Cr is 50 ppb (as documented by WHO). 49 On the other hand, in the case of naked eye detection, the citrate-AuNP solution was only able to display sensing signals lower down to 0.5 ppm. Apart from the spectroscopic detection of the Cr, paper-based sensing platform has also delivered promising results.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Experimental and Computational Study on the Selective Interaction of Functionalized Gold Nanoparticles with Metal Ions: Sensing Prospects

et al. 2020

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Herein, we have developed citrate-, glutathione-, and ascorbate-functionalized gold nanoparticles (AuNPs) to examine their interactions with diverse heavy metal ions, such as Cd, Mn, Cr, Fe, Co, Pb, Hg, Zn, and Ti. These interactions are crucial in defining the final outcome of AuNP-based sensing/removal of heavy metals. We have evaluated these interactions by analyzing the variations in the color and spectroscopic signals of functionalized AuNPs. Additionally, the obtained results were also compared and validated with the computational studies. It has been observed that citrate-AuNPs and GSH-AuNPs displayed high selectivity toward Cr and Mn with E force values of −23.4 and −14.0 kJ/mol, respectively. Likewise, the ascorbate-AuNPs displayed sensitivity for multiple ions, for example, Cd, Fe, and Mn, with an E force value of −19.6 kJ/mol. A detailed analysis focusing on the electrostatic charges, ionic sizes, and interaction energy values has been provided to show specific interactions between functionalized AuNPs and heavy metal ions. The respective mechanisms of interaction between heavy metal ions and functionalized AuNPs have been explored with the help of experimental and computational outcomes.

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“…Devi et al utilized Carica papaya waste as a natural source for a simple pyrolysis route and obtained a good QY of 23.7%. The reported CDs have a chromium sensitivity of 0.708 ppb in water [83]. Recently, a further increase in QY was obtained up to 30.8% by using Abelmoschus manihot flowers.…”

Section: Plant Sourcesmentioning

confidence: 96%

“…Functional groups, such as carbonyl and carboxylic groups, on the CDs help in their modification with EDTA, producing EDTA-functionalized CDs (fCDs). The fCDs, then coordinate with the chromium ions through oxygen and nitrogen of the functionalized ethylene diamine (Figure 16) [83].…”

Section: Cr 6+ Ion Sensingmentioning

confidence: 99%

Recent advances in green carbon dots (2015–2022): synthesis, metal ion sensing, and biological applications

Kanwal¹,

Bibi²,

Hyder³

et al. 2022

Beilstein J. Nanotechnol.

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Carbon dots (CDs) show extensive potential in various fields such as sensing, bioimaging, catalysis, medicine, optoelectronics, and drug delivery due to their unique properties, that is, low cytotoxicity, cytocompatibility, water-solubility, multicolor wavelength tuned emission, photo-stability, easy modification, strong chemical inertness, etc. This review article especially focuses on the recent advancement (2015–2022) in the green synthesis of CDs, their application in metal ions sensing and microbial bioimaging, detection, and viability studies as well as their applications in pathogenic control and plant growth promotion.

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Green synthesis of glowing carbon dots from Carica papaya waste pulp and their application as a label-freechemo probe for chromium detection in water

Cited by 112 publications

References 42 publications

A Review on Multifunctional Carbon-Dots Synthesized From Biomass Waste: Design/ Fabrication, Characterization and Applications

A Review on Multifunctional Carbon-Dots Synthesized From Biomass Waste: Design/ Fabrication, Characterization and Applications

Experimental and Computational Study on the Selective Interaction of Functionalized Gold Nanoparticles with Metal Ions: Sensing Prospects

Recent advances in green carbon dots (2015–2022): synthesis, metal ion sensing, and biological applications

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