A fluorescent carbon dots synthesized at room temperature for automatic determination of nitrite in Sichuan pickles

Zhang, Guo-Qi; Shi, Yuhan; Wu, Wei; Zhao, Yang; Xu, Zhi-Hong

doi:10.1016/j.saa.2022.122025

Cited by 12 publications

(4 citation statements)

References 41 publications

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“…On the other hand, the ATR-FTIR spectrum of the NN-CDs had significant peaks at 1701, 1600, 1475, 1312, 1195, and 1090–960 cm −1 corresponding with the C=O stretching, C=C stretching, C–N stretching, O–H bending, C–OH stretching, and C–O–C stretching modes [ 45 , 46 ]. The peak at 770 cm −1 could be ascribed to the out-plane –CH 2 stretching and N–H bending vibrations of the aromatic carbon structure [ 47 ]. The existence of a C=C peak signposted that the NN-CDs had a graphitic structure whereas the O–H, N–H, C=O, C–N, and C–H vibration modes suggested that the NN-CDs had amine, hydroxyl, and carboxylic surface moieties.…”

Section: Resultsmentioning

confidence: 99%

Natural Nitrogen-Doped Carbon Dots Obtained from Hydrothermal Carbonization of Chebulic Myrobalan and Their Sensing Ability toward Heavy Metal Ions

Atchudan

Perumal

Edison

et al. 2023

Sensors

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Chebulic Myrobalan is the main ingredient in the Ayurvedic formulation Triphala, which is used for kidney and liver dysfunctions. Herein, natural nitrogen-doped carbon dots (NN-CDs) were prepared from the hydrothermal carbonization of Chebulic Myrobalan and were demonstrated to sense heavy metal ions in an aqueous medium. Briefly, the NN-CDs were developed from Chebulic Myrobalan by a single-step hydrothermal carbonization approach under a mild temperature (200 °C) without any capping and passivation agents. They were then thoroughly characterized to confirm their structural and optical properties. The resulting NN-CDs had small particles (average diameter: 2.5 ± 0.5 nm) with a narrow size distribution (1–4 nm) and a relatable degree of graphitization. They possessed bright and durable fluorescence with excitation-dependent emission behaviors. Further, the as-synthesized NN-CDs were a good fluorometric sensor for the detection of heavy metal ions in an aqueous medium. The NN-CDs showed sensitive and selective sensing platforms for Fe3+ ions; the detection limit was calculated to be 0.86 μM in the dynamic range of 5–25 μM of the ferric (Fe3+) ion concentration. Moreover, these NN-CDs could expand their application as a potential candidate for biomedical applications and offer a new method of hydrothermally carbonizing waste biomass.

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Section: Resultsmentioning

confidence: 99%

Natural Nitrogen-Doped Carbon Dots Obtained from Hydrothermal Carbonization of Chebulic Myrobalan and Their Sensing Ability toward Heavy Metal Ions

Atchudan

Perumal

Edison

et al. 2023

Sensors

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“…TEM, on the other hand, is routinely used for the imaging of internal and morphological structures of CNMs. It transmits high energy electrons through a thin sample to visualize internal and peripheral structural characteristics of CDs, , CNTs, graphene, , and GO , (Figure A).…”

Section: Carbon Nanomaterials Synthesis and Characterizationmentioning

confidence: 99%

Carbon Nanomaterial Fluorescent Probes and Their Biological Applications

Krasley,

Li,

Galeana

et al. 2024

Chem. Rev.

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Fluorescent carbon nanomaterials have broadly useful chemical and photophysical attributes that are conducive to applications in biology. In this review, we focus on materials whose photophysics allow for the use of these materials in biomedical and environmental applications, with emphasis on imaging, biosensing, and cargo delivery. The review focuses primarily on graphitic carbon nanomaterials including graphene and its derivatives, carbon nanotubes, as well as carbon dots and carbon nanohoops. Recent advances in and future prospects of these fields are discussed at depth, and where appropriate, references to reviews pertaining to older literature are provided.

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“…Numerous analytical methods have been developed for nitrite detection in several sample matrices, such as chromatography, 10,11 spectrophotometry, 12,13 uorescence, 14,15 colorimetry, 16,17 capillary electrophoresis, 18,19 surface-enhanced Raman scattering, 20,21 chemiluminescence, 22,23 and electrochemical sensors. 24,25 Nevertheless, most of the described nitrite detection techniques have limitations, such as hazardous chemical use, sophisticated instrumentation, laborious and complex sample preparation, high cost, and limited selectivity.…”

Section: Introductionmentioning

confidence: 99%

Comparison of the analytical performance of two different electrochemical sensors based on a composite of gold nanorods with carbon nanomaterials and PEDOT:PSS for the sensitive detection of nitrite in processed meat products

Wahyuni,

Rahman,

Afifah

et al. 2024

RSC Adv.

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A fluorescent carbon dots synthesized at room temperature for automatic determination of nitrite in Sichuan pickles

Cited by 12 publications

References 41 publications

Natural Nitrogen-Doped Carbon Dots Obtained from Hydrothermal Carbonization of Chebulic Myrobalan and Their Sensing Ability toward Heavy Metal Ions

Natural Nitrogen-Doped Carbon Dots Obtained from Hydrothermal Carbonization of Chebulic Myrobalan and Their Sensing Ability toward Heavy Metal Ions

Carbon Nanomaterial Fluorescent Probes and Their Biological Applications

Comparison of the analytical performance of two different electrochemical sensors based on a composite of gold nanorods with carbon nanomaterials and PEDOT:PSS for the sensitive detection of nitrite in processed meat products

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