One-step green synthesized fluorescent carbon nanodots from bamboo leaves for copper(II) ion detection

Liu, Yingshuai; Zhao, Yuechao; Zhang, Yuanyuan

doi:10.1016/j.snb.2014.02.053

Cited by 357 publications

(145 citation statements)

References 22 publications

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“…Overall, PL intensity is stronger in the acidic condition than under alkaline conditions and reach the highest at pH 7. This result is similar to that reported in the literature [36], which is perhaps owing to the variation of functional groups on the surface of CD at different pH values. The PL intensity of CDs is higher in the pH range from 3 to 7 than in other pH values, indicating that they have more application potential in acidic and neutral conditions.…”

Section: Resultssupporting

confidence: 92%

Synthesis of cellulose-derived carbon dots using acidic ionic liquid as a catalyst and its application for detection of Hg2+

Wang

et al. 2015

J Mater Sci

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Carbon dots (CDs) as versatile carbon-based nanomaterials have attracted increasing attention because of their non-toxicity, good water solubility and photostability, and easy surface functionalization. For their wide application, it is still needed to explore moderate and facile methods for synthesizing CDs from green and inexpensive precursors. In this paper, a moderate method was developed to synthesize water-soluble CDs by ionothermal treatment of cellulose with SO 3 H-functionalized acidic ionic liquid as a catalyst in 1-butyl-3-methylimidazolium chloride ([Bmim]Cl). The preparation process was carried out at relatively low temperature in non-pressurized vessel. The synthesized CDs exhibit near-spherical morphology with an average diameter of 8.0 nm, and the surface is carbon and oxygen rich. The CDs have powder-blue fluorescence with excitation-dependent emission behavior and excellent stability. Moreover, the as-prepared CDs were demonstrated as an effective ''turn-off'' fluorescent probe for the selective detection of Hg 2? with a good linear relationship over the concentration range from 6 to 80 lM. The application of acidic ionic liquid should provide a new path for the synthesis of CDs under mild condition.

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Section: Resultssupporting

confidence: 92%

Synthesis of cellulose-derived carbon dots using acidic ionic liquid as a catalyst and its application for detection of Hg2+

Wang

et al. 2015

J Mater Sci

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“…Similar to other CQDs reported in literature, [41][42][43] the asprepared CQDs and M-CQDs in aqueous solution exhibited strong luminescence. Figures 6A, S2, and S3 show the UVvis absorption, PL spectra, and excitation spectrum of the CQDs and M-CQDs in aqueous solution, respectively.…”

Section: Photophysical Propertiessupporting

confidence: 87%

Facile synthesis of N-rich carbon quantum dots from porphyrins as efficient probes for bioimaging and biosensing in living cells

Wang

et al. 2017

IJN

159

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N-rich metal-free and metal-doped carbon quantum dots (CQDs) have been prepared through one-step hydrothermal method using tetraphenylporphyrin or its transition metal (Pd or Pt) complex as precursor. The structures and morphology of the as-prepared nanoparticles were analyzed by X-ray diffraction, high-resolution transmission electron microscopy, X-ray photoelectron spectroscopy, and Fourier transform infrared spectra. Three kinds of nanocomposites show similar structures except for the presence of metal ions in Pd-CQDs and Pt-CQDs indicated by X-ray photoelectron spectroscopy. All of them display bright blue emission upon exposure to ultraviolet irradiation. The CQDs exhibit typical excitation-dependent emission behavior, with the emission quantum yield of 10.1%, 17.8%, and 15.2% for CQDs, Pd-CQDs, and Pt-CQDs, respectively. Moreover, the CQDs, Pd-CQDs, and Pt-CQDs could serve as fluorescent probes for the specific and sensitive detection of Fe 3+ ions in aqueous solution. The low cytotoxicity of CQDs is demonstrated by MTT assay against HeLa cells. Therefore, the CQDs can be used as efficient probes for cellular multicolor imaging and fluorescence sensors for the detection of Fe 3+ ions due to their low toxicity, excellent biocompatibility, and low detection limits. This work provides a new route to synthesize highly luminescent N-rich metal-free or metal-doped CQDs for multifunctional applications.

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“…This is attributed to the successful introduction of nitrogen-containing organic molecules onto the surface of Cdots. 27,33,57,58 In this study, water soluble nitrogen doped carbon dots (Ndoped C-dots), and their nano-hybrids plasmonic nanoparticles such as, Au or Ag NPs in presence of PEI e.g. C-dots/ PEI/Au or C-dots/PEI/Ag have been prepared for the sake of bioimaging application.…”

Section: -56mentioning

confidence: 99%

Cyto-toxicity, biocompatibility and cellular response of carbon dots–plasmonic based nano-hybrids for bioimaging

et al. 2017

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In this study, hybrid carbon dots-plasmonic nanostructures including carbon dots/polyethyleneimine/gold (C-dots/PEI/Au), and carbon dots/polyethyleneimine/silver (C-dots/PEI/Ag) have been prepared using a microwave irradiation method. The prepared hybrid nanostructures have been characterized via optical spectroscopy, high resolution transmission electron microscopy (HRTEM), and X-ray diffraction (XRD).A remarkable enhancement in the optical parameters, such as absorptivity and quantum yield (QY), has been observed for the hybrid nanostructure compared to pure carbon dots. This plasmonic enhancement was more pronounced in the presence of silver (C-dots/PEI/Ag nanohybrid) than that of gold (C-dots/PEI/Au nanohybrid). This is referred to the low intrinsic loss and the degree of the overlap between the absorption spectra of silver nanoparticles and carbon dots. Furthermore, the biocompatibility assay and cellular response on epithelial kidney (Vero) normal cell has been investigated.The results showed that the optimal dose of treatment is about $200 mg ml À1 using both C-dots/PEI/Au or C-dots/PEI/Ag, nano-hybrids could be used safely in diagnostic bioimaging applications.

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One-step green synthesized fluorescent carbon nanodots from bamboo leaves for copper(II) ion detection

Cited by 357 publications

References 22 publications

Synthesis of cellulose-derived carbon dots using acidic ionic liquid as a catalyst and its application for detection of Hg2+

Synthesis of cellulose-derived carbon dots using acidic ionic liquid as a catalyst and its application for detection of Hg2+

Facile synthesis of N-rich carbon quantum dots from porphyrins as efficient probes for bioimaging and biosensing in living cells

Cyto-toxicity, biocompatibility and cellular response of carbon dots–plasmonic based nano-hybrids for bioimaging

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