Carbon dots-based fluorescent probe for “off-on” sensing of Hg(II) and I

He, Jiangling; Zhang, Haoran; Zou, Jinliang; Liu, Yingliang; Zhuang, Jianle; Xiao, Yong; Lei, Bingfu

doi:10.1016/j.bios.2015.12.084

Cited by 158 publications

(56 citation statements)

References 26 publications

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“…Similarly, He et al prepared carbon dots from sodium salt of EDTA and reported a broad peak around 24.4°, corresponding to 0.363 nm interlayer spacing of CDs. No sharp peaks were observed in the XRD patterns, confirming the amorphous character [35].…”

Section: Characterization Of N-cdsmentioning

confidence: 60%

Blue light-emitting carbon dots (CDs) from a milk protein and their interaction with Spinacia oleracea leaf cells

Bajpai

D'Souza²,

Suhail

2019

Int Nano Lett

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The milk protein casein (Cas) has been employed as carbon resource material to synthesize nitrogen-doped carbon dots (N-CDs) via microwave exposure. The dots, when exposed to UV light, produced blue fluorescence. The N-CDs were characterized by ultra violet (UV) spectroscopy, Fourier transformation infrared spectroscopy, X-ray diffraction (XRD), dynamic light scattering analysis, fluorescent microscopy (FM), and transmission electron microscopy (TEM). The XRD analysis revealed a broad peak at 2θ = 20°, thus indicating the turbostratic carbon phase. TEM analysis and particle size distribution curve revealed that nearly, 85% of the particles had diameter below 10 nm and the particles had spherical geometry. The HRTEM analysis revealed that carbon dots exhibited lattice fringes with a d-spacing of 0.21 nm, corresponding to the (100) plane lattice of graphite. The fluorescence spectral studies indicated a red shift in the emission peak from 420 to 450 nm as the excitation wavelength increased from 300 to 340 nm. The zeta potential of particles was found to be -11.3 mV. Finally, impregnation of N-CDs was studied in Spinacia oleracea leaf. It was observed that as the concentration of N-CDs' solution increased, percent insertion (PI) also increased, but the time required for maximal insertion decreased with increasing concentrations of N-CDs in the feed solutions. In the carbon dots' solution with a concentration of 200 ppm, maximum percent insertion (MPI) was obtained after 80 min. However, with the increasing concentration of N-CDs in the feed solutions, time of getting MPI reduced, i.e., in 600 ppm, it was 30 min, and in 800 ppm, it was 10 min.Publisher's Note Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

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Section: Characterization Of N-cdsmentioning

confidence: 60%

Blue light-emitting carbon dots (CDs) from a milk protein and their interaction with Spinacia oleracea leaf cells

Bajpai

D'Souza²,

Suhail

2019

Int Nano Lett

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“…Moreover,t here is ag ood linear relationship between the fluorescence intensity and NFAc oncentration range from 0t o4 0mm ( Figures S7 and S8), and the limits of detection for NFZa nd NFT are estimated to be 0.21 and 0.16 mm,r espectively,b ased on the three-sigma rule. [15] In addition, considering nitroimidazoles (MDZ, DTZ) had ac ertain quenching effect on the film, the analogous studies were also implemented (Figures S9-S12). The K sv value was calculated as 9.9 10 2 forM DZ and 1.2 10 3 for DTZ, which are far less than those of the NFAs, further demonstratingt he Eu-BCA thin-film has ah igh selectivity toward NFAs.…”

Section: Characterization Of Thementioning

confidence: 99%

A Lanthanide MOF Thin‐Film Fixed with Co₃O₄ Nano‐Anchors as a Highly Efficient Luminescent Sensor for Nitrofuran Antibiotics

Zhang

Younan

Chu

et al. 2017

Chemistry A European J

170

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Nitrofurans are a group of widely used veterinary antibiotics, which have been banned due to antibiotics pollution. Development of a rapid and effective method for the detection of nitrofuran antibiotics (NFAs) is an important challenge. Herein, we designed a chemical sensor based on a thin-film composed of the lanthanide metal-organic framework (Ln-MOF) {[Eu (BCA) (H O)(DMF) ]⋅0.5DMF⋅H O} (Eu-BCA, in which BCA is 2,2'-biquinoline-4,4'-dicarboxylate) coated on a cost-effective stainless steel wire mesh (SSWM) by Co O nano-anchor fixation method. The MOF coatings were well adhered to the SSWM, resulting in a three-dimensional porous, flexible, and processable sensor. The structure of the as-prepared MOF thin-film was confirmed by powder X-ray diffraction (PXRD), and the surface morphology was examined by scanning electron microscopy (SEM). Significantly, the Eu-BCA thin-film was highly selective and sensitive to NFAs, and yet remained unaffected by other common antibiotics that may be present. The limits of detection for nitrofurantoin (NFT) and nitrofurazone (NFZ) are 0.21 and 0.16 μm, respectively. NFAs were also successfully detected in water from the Pearl River in Guangzhou, and from bovine serum samples. Hence, the reported Ln-MOF thin-film is a promising sensor for the detection of NFAs, thereby helping to protect human beings from all manner of hazards that arise from the abuse of antibiotics in livestock breeding.

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“…Recently, iodide has been successfully detected in low levels using heteroatom carbon quantum dots by following the turn on–off sensing method . He et al developed a fluorescence CDs probe for on–off detection of mercury (Hg 2+ ) and iodide ions . Here, the florescence emission of the synthesized CDs was quenched by addition of Hg 2+ ions followed by successive addition of iodide to the CDs/Hg(II) complex dispersion, the fluorescence intensity of the synthesized CDs was effectively recovered.…”

Section: Introductionmentioning

confidence: 97%

Fabrication of nitrogen‐ and phosphorous‐doped carbon dots by the pyrolysis method for iodide and iron(III) sensing

et al. 2017

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A facile and novel strategy to synthesize nitrogen- and phosphorous-doped carbon dots (NPCDs) by single step pyrolysis method is described here. Citric acid is used as carbon source and di-ammonium hydrogen phosphate is used as both nitrogen and phosphorous sources, respectively. Through the extensive study on optical properties, morphology and chemical structures of the synthesized NPCDs, it is found that as-synthesized NPCDs exhibited good excitation-dependent luminescence property, spherical morphology and high stability. The obtained NPCDs are stable in aqueous medium and possess a quantum yield of 10.58%. In this work, a new assay method is developed to detect iodide ions using the synthesized NPCDs. Here, the inner filter effect is applied to detect the iodide ion and exhibited a wide linear response concentration range (10-60 μM) with a limit of detection (LOD) of 0.32 μM. Furthermore, the synthesized NPCDs are used for the selective detection of iron(III) (Fe ) ions and cell imaging. Fe ions sensing assay shows a detection range from 0.2 to 30 μM with a LOD of 72 nM. As an efficient photoluminescence sensor, the developed NPCDs have an excellent biocompatibility and low cytotoxicity, allowing Fe ion detection in HeLa cells.

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Carbon dots-based fluorescent probe for “off-on” sensing of Hg(II) and I

Cited by 158 publications

References 26 publications

Blue light-emitting carbon dots (CDs) from a milk protein and their interaction with Spinacia oleracea leaf cells

Blue light-emitting carbon dots (CDs) from a milk protein and their interaction with Spinacia oleracea leaf cells

A Lanthanide MOF Thin‐Film Fixed with Co₃O₄ Nano‐Anchors as a Highly Efficient Luminescent Sensor for Nitrofuran Antibiotics

Fabrication of nitrogen‐ and phosphorous‐doped carbon dots by the pyrolysis method for iodide and iron(III) sensing

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Carbon dots-based fluorescent probe for “off-on” sensing of Hg(II) and I

Cited by 158 publications

References 26 publications

Blue light-emitting carbon dots (CDs) from a milk protein and their interaction with Spinacia oleracea leaf cells

Blue light-emitting carbon dots (CDs) from a milk protein and their interaction with Spinacia oleracea leaf cells

A Lanthanide MOF Thin‐Film Fixed with Co3O4 Nano‐Anchors as a Highly Efficient Luminescent Sensor for Nitrofuran Antibiotics

Fabrication of nitrogen‐ and phosphorous‐doped carbon dots by the pyrolysis method for iodide and iron(III) sensing

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A Lanthanide MOF Thin‐Film Fixed with Co₃O₄ Nano‐Anchors as a Highly Efficient Luminescent Sensor for Nitrofuran Antibiotics