Synthesis of carbogenic nanosphere from peanut skin

Saxena, Manav; Sarkar, Sabyasachi

doi:10.1016/j.diamond.2012.01.035

Cited by 43 publications

(24 citation statements)

References 42 publications

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“…42 The reason for three peaks in PLE spectrum is still not clear but it is a well observed phenomenon in PLE spectrum of those carbon nano structures which are obtained by carbonisation of common carbonaceous materials with unknown composition of the precursor. The triplet ground state of carbene radical is one of the responsible factors for the photoluminescence emission.…”

Section: Pl Properties Of Cnpsmentioning

confidence: 98%

“…39 42-44 The PL emission has been explained by considering triplet ground ( 1 1 state of carbene (where the two orbitals are singly occupied) and ground state multiplicity energy difference ( E) between the and orbital. [42][43] Taking consideration to triplet ground ( 1 1 ) state of carbene, Hoffman had calculated and shown that the energy difference between and orbital should be less than 1.5 eV for the presence of triplet ground state carbene. 43 44 The E is thus in the present case lies within the required value (1.5 eV) for triplet carbene.…”

Section: Pl Properties Of Cnpsmentioning

confidence: 99%

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Fluorescence imaging of human erythrocytes by carbon nanoparticles isolated from food stuff and their fluorescence enhancement by blood plasma

Saxena

Sarkar²

2013

Mat Express

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We have isolated carbon nanoparticles (CNPs) from bread. A simple oxidative treatment make them water soluble and fluorescent. CNPs exhibit fluorescence over a broad range of excitation wavelengths. These fluorescent CNPs have been susscessfully used for fluorescence imaging of human erythrocytes under 488 and 561 nm bandpass filters. Upon direct interaction with human erythrocytes, these CNPs show ∼6% haemolysis in 5 h. In the presence of blood plasma, the quantum yield of these water soluble carbon nanoparticles enhances from 2 to 4.5% leading to rise a new phenomenon of auto passivation of CNPs by bio-fluids. Therefore, these fluorescent CNPs can be used as a unique and new type of biomaterial for bioimaging and other biomedical applications.

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Section: Pl Properties Of Cnpsmentioning

confidence: 98%

Section: Pl Properties Of Cnpsmentioning

confidence: 99%

Fluorescence imaging of human erythrocytes by carbon nanoparticles isolated from food stuff and their fluorescence enhancement by blood plasma

Saxena

Sarkar²

2013

Mat Express

Self Cite

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“…Some of these synthesis techniques require high-value equipment, non-environmentally friendly chemicals, catalysts or harsh experimental conditions, which increase production costs. Many researchers have demonstrated the success of thermal degradation of various naturally occurring materials through furnace and microwave-assisted pyrolysis (6,8,12,13). As a result, there are ongoing efforts to develop simple, direct and economical methods to synthesize carbon nanoparticles without any surface passivation (5,6,9,11).…”

Section: Introductionmentioning

confidence: 99%

“…Among these strategies, the thermal (combustion) supported route, also known as pyrolysis of carbonaceous precursors, is a simple, clean and cost-effective method. Many researchers have demonstrated the success of thermal degradation of various naturally occurring materials through furnace and microwave-assisted pyrolysis (6,8,12,13).…”

Section: Introductionmentioning

confidence: 99%

Fluorescent carbon nanoparticles from Citrus sinensis as efficient sorbents for pollutant dyes

et al. 2016

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Here, we report a simple, green and economic process for the synthesis of highly fluorescent carbon nanoparticles (CPs) through low-temperature carbonization of a fruit waste, Citrus sinensis peel. This approach allows the large-scale production of aqueous CPs dispersions without any additives and post-treatment processes. The as-prepared CPs were of small particle size, exhibited bright blue fluorescence under UV irradiation (λ = 365 nm) with excellent colloidal stability in water. The chemical composition, structure and morphology of the as-prepared CPs were analyzed using various spectroscopic techniques such as X-ray diffraction, transmission electron microscopy and raman spectroscopy. The formed CPs were turbostratic in nature, with a large number of functional groups on the surface. We explored the adsorption characteristics of the formed CPs for wastewater treatment. Because of the negative surface of the CPs, as evident from the zeta value, it is possible to use them for selective adsorption of the cationic dye methylene blue from a mixture of dyes. The equilibrium adsorption isotherm revealed that the Langmuir model better describes the adsorption process than the Freundlich model. As-prepared CPs rapidly adsorbed ~84% of the methylene blue within 1 min and can be regenerated and used repeatedly. Copyright © 2016 John Wiley & Sons, Ltd.

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“…Unfortunately, application of CNP in food and its packaging materials is still in its infancy. Several methods are currently in use to synthesize CNP in the sizes from 30 nm to several micrometers, such as arc plasma technique, self-assembly template approach, reduction of supercritical carbon dioxide with bimetallic lithium and potassium, pyrolysis of carbon sources, hydrothermal reaction, and chemical vapour deposition [1]. However, most of these methods either use complicated equipment or require rigorous reaction conditions or are time-consuming.…”

Section: Introductionmentioning

confidence: 99%

Industrial Waste-Derived Nanoparticles and Microspheres Can Be Potent Antimicrobial and Functional Ingredients

Purkayastha

Manhar

Mandal

et al. 2014

Journal of Applied Chemistry

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Rapeseed oilcake or press-cake is generated as bulk waste during oil extraction from oilseeds. Owing to its high protein content, further processing of oilcakes into vegetable protein generates large quantities of fibrous residue (“oil-and-protein” spent meal) as by-product, which currently has very limited practical utility. Here, we report hydrothermal carbonization of this industrial waste to convert it into carbon nanoparticles, bestowed with multitude of functionalities. We demonstrate that these nanoparticles can be assembled into micrometer-sized spheres when precipitated from water by acetone. These microspheres, with their added feature of hemocompatibility, can be potentially utilized as an encapsulation vehicle for the protection of thermolabile compounds (such as protein); however, the secondary and tertiary features of the protein were marginally perturbed by the encapsulation process. The synthesized carbon nanoparticle was found to be an effective biocidal agent, exhibiting bacterial cellular damage and complex formation with the bacterial plasmid (evident from ethidium bromide exclusion assay), which are critical for cell survival. The results show the ability to convert industrial biowaste into useful nanomaterials for use in food industries and also suggest new scalable and simple approaches to improve environmental sustainability in industrial processes.

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Synthesis of carbogenic nanosphere from peanut skin

Cited by 43 publications

References 42 publications

Fluorescence imaging of human erythrocytes by carbon nanoparticles isolated from food stuff and their fluorescence enhancement by blood plasma

Fluorescence imaging of human erythrocytes by carbon nanoparticles isolated from food stuff and their fluorescence enhancement by blood plasma

Fluorescent carbon nanoparticles from Citrus sinensis as efficient sorbents for pollutant dyes

Industrial Waste-Derived Nanoparticles and Microspheres Can Be Potent Antimicrobial and Functional Ingredients

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