Carbon dots synthesized by hydrothermal process via sodium citrate and NH4HCO3 for sensitive detection of temperature and sunset yellow

Yang, Huan; Long, Yuwei; Li, Hong‐Xi; Pan, Shuang; Liu, Hui; Yang, Jinlong; Hu, Xiaoli

doi:10.1016/j.jcis.2018.01.054

Cited by 51 publications

(19 citation statements)

References 59 publications

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“…49,50 The XRD main peaks of previously reported CNDs usually vary from 17 to 26 , indicating the different distances between the adjacent carbon atomic planes of the CNDs. 15,[51][52][53][54] These XRD results do not indicate a graphite or graphene structure carbon atomic plane directly, because of similar results in polymer research. The 13 C NMR, FT Raman spectroscopy, and FT-IR spectroscopy results conrm that the MGSH CNDs in this work have PAH carbon atomic planes.…”

Section: Pah Inner Structure Of the Cndsmentioning

confidence: 66%

Polyaromatic hydrocarbon inner-structured carbon nanodots for interfacial enhancement of carbon fiber composite

2020

RSC Adv.

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Section: Pah Inner Structure Of the Cndsmentioning

confidence: 66%

Polyaromatic hydrocarbon inner-structured carbon nanodots for interfacial enhancement of carbon fiber composite

2020

RSC Adv.

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“…Supplementary Materials: The following are available online at http://www.mdpi.com/2079-6412/9/5/289/s1, Table S1: Elemental analysis of samples prepared with varied R AMP values for 4-h hydrothermal time; Table S2: Recently reported cases of self-motivated fluorescent hydroxyapatite; Table S3: Recently reported cases of citrate-derived fluorescent carbon nanodots; Figure S1: Lifetime (τ) of fluorescent hydroxyapatite synthesized at R AMP values of (a) 5%; (b) 50%; and (c) 100%; Figure S2: XPS survey spectrum, and C 1s and N 1s high-resolution XPS spectra, of samples with R AMP values of 5% (a-c), 50% (d-f), and 100% (g-i); Figure S3: Synthesizing fluorescent hydroxyapatite using other compounds containing an NH 2 group. References [48][49][50][51][52][53][54][55][56][57][58][59][60][61][62][63] are cited in the supplementary materials.…”

Section: Discussionmentioning

confidence: 99%

Ammonium-Induced Synthesis of Highly Fluorescent Hydroxyapatite Nanoparticles with Excellent Aqueous Colloidal Stability for Secure Information Storage

Cheng

Tong²,

Fang

et al. 2019

Coatings

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In this paper, uniform hydroxyapatite (HA) nanoparticles, with excellent aqueous colloidal stability and high fluorescence, have been successfully synthesized via a citrate-assisted hydrothermal method. The effect of the molar ratio of ammonium phosphate in phosphate (RAMP) and hydrothermal time on the resultant products was characterized in terms of crystalline structure, morphology, colloidal stability, and fluorescence behavior. When the RAMP is 50% and the hydrothermal time is 4 h, the product consists of a pure hexagonal HA phase and a uniform rod-like morphology, with 120- to 150-nm length and approximately 20-nm diameter. The corresponding dispersion is colloidally stable, and transparent for at least one week, and has an intense bright blue emission (centered at 440 nm, 11.6-ns lifetime, and 73.80% quantum efficiency) when excited by 340-nm UV light. Although prolonging the hydrothermal time and increasing the RAMP had no appreciable effect on the aqueous colloidal stability of HA nanoparticles, the fluorescence intensity was enhanced. The cause of HA fluorescence are more biased towards carbon dots (which are mainly polymer clusters and/or molecular fluorophores constituents) trapped in the hydroxyapatite crystal structure. Owing to these properties, a highly fluorescent HA colloidal dispersion could find applications in secure information storage.

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“…For a better characterization of the CDs, a FTIR analysis was performed to verify the functional groups present on the surface of the CDs. In Figure 1c, bands at 3200-3630 cm -1 are attributed to the stretching vibration of O−H and N-H. 35 Peaks at 1577 and 1396 cm -1 correspond to the asymmetric and symmetric stretching vibrations of the carboxylate anions. 28 Thus, it is possible that the amino groups on the surface of the synthesized CDs interact with the phenolic hydroxyls present in quercetin.…”

Section: Characterization Of Carbon Dotmentioning

confidence: 99%

“…In this way the hydrogen bonding between the quercetin and the surface of the CDs occurs, which causes the quenching of the fluorescence. 35 The synthesized carbon dot was applied to the analysis of quercetin. Consequently, studies were carried out to establish the best reaction conditions between the carbon dot and quercetin.…”

Section: Characterization Of Carbon Dotmentioning

confidence: 99%

“…Therefore, it is possible to observe in Figure 7 that the fluorescence lifetime of CDs and CDs in the presence of 10 mg L -1 quercetin in buffer solution pH 11 was 6.43 and 6.54 ns, respectively, where τ 0 /τ = 1, which proves that the mechanism of quenching of fluorescence involved in the reaction was static quenching. 35,37 Fluorescence emission decay profile of the other quercetin concentrations in buffer solution and in aqueous solution can be seen in Figures S1-S6 (Supplementary Information section).…”

Section: Mechanism Of Interaction Between Carbon Dot and Quercetinmentioning

confidence: 99%

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Use of Carbon Dots Synthesized from Citrate as a Fluorescent Probe for Quercetin Determination in Tea and Beer Samples

Paula¹,

Milani²,

Lavorante³

et al. 2019

J. Braz. Chem. Soc.

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In this work, carbon dots (CDs) prepared by a one-step hydrothermal method were employed for the determination of quercetin in teas and beers. The fluorescence quenching of CDs was proportional to the concentration of quercetin. Under optimum experimental conditions, linear quenching was observed for quercetin in the range of 1.0 to 10 mg L-1 (F/F 0 = (0.1511 ± 0.0075)[Q] + (0.8922 ± 0.0384), R 2 = 0.9926), at room temperature, using 80 μL CDs and 0.1 mol L-1 Na 2 HPO 4 /NaOH buffer solution (pH 11.0). A limit of detection (3σ criterion) of 0.85 mg L-1 , and a relative standard deviation of 0.21% (n = 3) for 4.0 mg L-1 quercetin solution was obtained. Addition and recovery tests with tea and beer samples were performed resulting in recoveries at the range between 80 and 118%. This procedure served successfully to determine quercetin in beer and tea samples presenting high sample throughput.

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Carbon dots synthesized by hydrothermal process via sodium citrate and NH4HCO3 for sensitive detection of temperature and sunset yellow

Cited by 51 publications

References 59 publications

Polyaromatic hydrocarbon inner-structured carbon nanodots for interfacial enhancement of carbon fiber composite

Polyaromatic hydrocarbon inner-structured carbon nanodots for interfacial enhancement of carbon fiber composite

Ammonium-Induced Synthesis of Highly Fluorescent Hydroxyapatite Nanoparticles with Excellent Aqueous Colloidal Stability for Secure Information Storage

Use of Carbon Dots Synthesized from Citrate as a Fluorescent Probe for Quercetin Determination in Tea and Beer Samples

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