Synthesis and Characterization of Carbon Quantum Dots from Orange Juice

Kumar, Dinesh; Singh, Karamjit; Verma, Veena; Bhatti, H. S.

doi:10.1166/jbns.2014.1236

Cited by 65 publications

(38 citation statements)

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“…Orange waste peels are underused natural resources and it is still challenging to use these leftover residues effectively. For CQD synthesis, carbonization of glucose, sucrose, glycol, glycerin, and citric acid has received significant attention …”

Section: Introductionmentioning

confidence: 99%

“…For CQD synthesis, carbonization of glucose, sucrose, glycol, glycerin, and citric acid has received significant attention. [22] Some previous reports have described the preparation and application of orange peel carbon dots as fluorescence markers, as bioimaging agents, in photoluminescence, as efficient catalysts, and in energy sciences. [23][24][25] However, detailed reports for the nonlinear optical performance of CQDs is still absent and this article attempts to fill this gap.…”

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confidence: 99%

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Facile preparation of high fluorescent carbon quantum dots from orange waste peels for nonlinear optical applications

et al. 2019

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A facile and eco‐friendly hydrothermal method was used to prepare carbon quantum dots (CQDs) using orange waste peels. The synthesized CQDs were well dispersed and the average diameter was 2.9 ± 0.5 nm. Functional group identification of the CQDs was confirmed by Fourier transform infrared spectrum analysis. Fluorescence properties of the synthesized CQDs exhibited blue emission. The fluorescence quantum yield of the CQDs was around 11.37% at an excitation wavelength of 330 nm. The higher order nonlinear optical properties were examined using a Z‐scan technique and a continuous wave laser that was operated at a wavelength of 532 nm. Results demonstrated that the synthesis of CQDs can be considered as promising for optical switching devices, bio‐scanning, and bio‐imaging for optoelectronic applications.

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Section: Introductionmentioning

confidence: 99%

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confidence: 99%

Facile preparation of high fluorescent carbon quantum dots from orange waste peels for nonlinear optical applications

et al. 2019

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“…Figure 8 shows time resolved decay curves for Ga 1−x Ni x N (0 ≤ x ≤ 0.1) nanocrystals at emission wavelength (a) 365 nm for 0.1% (b) 375 nm for 1% (c) 380 nm 10% Ni doped GaN nanocrystals. Using methodology of time resolved fluorescence, mentioned by Kumar et al [19][20][21][22][23][24][25][26], one can calculate various optical parameters of optoelectronic industrial interest such as decay time, trap depth integrated cross section area, oscillator strength, dipole moment, Einstein stimulated coefficient etc. From …”

Section: Resultsmentioning

confidence: 99%

Synthesis and optical characterization of pure and nickel doped gallium nitride nanocrystals

Kumar

Singh

Kumar

et al. 2015

Chemical Physics Letters

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“…Figure 14a, b show time resolved decay curves recorded for SWCNTs and functionalized SWCNTs. Method of kumar et al [17][18][19][20][21] was used to peel of the decay curves into three exponential components (s 1 , s 2 , s 3 ). Trap-depth values 'E' had been calculated using Boltzmann equation.…”

Section: Functionalization Ofmentioning

confidence: 99%

“…Classically, oscillator strength is used as a statistical weight indicating the relative number of oscillators bound at each resonant frequency. Einstein's stimulated coefficient has been calculated using well known relations [17][18][19][20][21][22].…”

Section: Functionalization Ofmentioning

confidence: 99%

Investigation of optical properties of pristine and functionalized single-walled carbon nanotubes

Kumar

Singh

Verma³

et al. 2015

J Mater Sci: Mater Electron

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Single-walled carbon nanotubes have been synthesized by chemical vapor deposition technique followed by hydroxyl addent functionalization. Crystallographic, topographic and morphological analyses of pristine and functionalized single walled carbon nanotubes (SWCNTs) have been studied via powder X-ray diffraction, field emission scanning electron microscope, high resolution transmission electron microscope and atomic force microscope respectively. UV-Vis absorption, Raman spectroscopy, thermogravemetric analysis, X-ray photo electron spectroscopy and Fourier transform infra-red spectroscopic studies have been carried out for confirmation of functionalization. Optical, quantitative and qualitative analysis of the pristine and functionalized SWCNTs have been completed via energy resolved and time resolved photoluminescence and energy dispersive X-ray spectroscopic studies respectively. Spectroscopic studies confirm the formation of good quality pristine and functionalized SWCNTs with hydroxyl addent. Recorded electron micrographs reveal the formation of fragmented functionalized SWCNTs with high aspect ratio whereas recorded diffraction patterns show the good crystallinity of synthesized nanostructures. Structural analyses of pristine and functionalized SWCNTs have been studied using Brunauer-Emmett-Teller surface area analysis, BarrettJoyner-Halenda pore size and volume analysis technique. Improved CVD method used in present studies is an ecofriendly method, which gives good yield of high quality SWCNTs.

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Synthesis and Characterization of Carbon Quantum Dots from Orange Juice

Cited by 65 publications

References 0 publications

Facile preparation of high fluorescent carbon quantum dots from orange waste peels for nonlinear optical applications

Facile preparation of high fluorescent carbon quantum dots from orange waste peels for nonlinear optical applications

Synthesis and optical characterization of pure and nickel doped gallium nitride nanocrystals

Investigation of optical properties of pristine and functionalized single-walled carbon nanotubes

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