Biomass-derived nitrogen-doped carbon quantum dots: highly selective fluorescent probe for detecting Fe3+ ions and tetracyclines

Qi, Houjuan; Teng, Min; Liu, Miao; Liu, Shouxin; Li, Jian; Yu, Haipeng; Teng, Chun‐Bo; Huang, Zhanhua; Liu, Hu; Shao, Qian; Umar, Ahmad; Ding, Tao; Gao, Qiang; Guo, Zhanhu

doi:10.1016/j.jcis.2018.12.047

Cited by 475 publications

(174 citation statements)

References 95 publications

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“…In the UV−vis absorption spectrum ( Figure 5), ON-CQDs and WN-CQDs presented two obvious absorption peaks at around 265 and 280 nm, respectively. The peaks at 265 and 280 nm were ascribable to the π-π* transition for the C=C or C=O bond in which the orbital was sp 2 hybridized clusters [24,26,27,63]. The fluorescence emission spectra of N-CQDs under different excitations were shown in Figure 6.…”

Section: Optical Properties Of N-cqdsmentioning

confidence: 99%

Green Preparation of Fluorescent Nitrogen-Doped Carbon Quantum Dots for Sensitive Detection of Oxytetracycline in Environmental Samples

Gao

Wang

et al. 2020

Nanomaterials

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Nitrogen-doped carbon quantum dots (N-CQDs) with strong fluorescence were prepared by a one-step hydrothermal method using natural biomass waste. Two efficient fluorescent probes were constructed for selective and sensitive detection of oxytetracycline (OTC). The synthesized N-CQDs were characterized by UV-visible absorption spectra, fluorescence spectra, Fourier transform infrared spectroscopy (FT-IR), X-ray photon spectroscopy (XPS), atomic force microscopy (AFM), and high-resolution transmission electron microscopy (HRTEM), which proved that the synthesized N-CQDs surface were functionalized and had stable fluorescence performance. The basis of N-CQDs detection of OTC was discussed, and various reaction conditions were studied. Under optimized conditions, orange peel carbon quantum dots (ON-CQDs) and watermelon peel carbon quantum dots (WN-CQDs) have a good linear relationship with OTC concentrations in the range of 2–100 µmol L−1 and 0.25–100 µmol L−1, respectively. ON-CQDs and WN-CQDs were both successfully applied in detecting the OTC in pretreated tap water, lake water, and soil, with the recovery rate at 91.724–103.206%, and the relative standard deviation was less than 5.35%. The results showed that the proposed N-CQDs proved to be green and simple, greatly reducing the detection time for OTC in the determination environment.

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Section: Optical Properties Of N-cqdsmentioning

confidence: 99%

Green Preparation of Fluorescent Nitrogen-Doped Carbon Quantum Dots for Sensitive Detection of Oxytetracycline in Environmental Samples

Gao

Wang

et al. 2020

Nanomaterials

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“…During the recent years, a noticeable growth in the demand of wearable bioelectronic devices, which can monitor motions, was registered. Various fields such as healthcare, robotic systems, prosthetics, visual realities, professional sports, and entertainments can be mentioned …”

Section: Introductionmentioning

confidence: 99%

Hydroxymethylation of technical lignins from South American sources with potential use in phenolic resins

Taverna

Felissia

Área

et al. 2019

J of Applied Polymer Sci

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This work investigates the valorization of sodium lignosulfonate, kraft, and organosolv lignins from South America. A detailed characterization of the lignins and their chemical modification by hydroxymethylation through its reaction with formaldehyde were performed. The characterization included measurements of moisture, ash, carbohydrate contents, elemental and thermogravimetric analysis, and functional groups, molar mass distributions by Fourier transform infrared spectroscopy, and size exclusion chromatography, respectively. Also, reactive aromatic hydrogens ( H Ar ) were quantified by the measurement of phenolic hydroxyl groups (P-OH) content by UV-Vis spectroscopy. The different initial formaldehyde/lignin weight ratios (0.07, 1.47), temperatures (40, 50, and 70 C), and pHs (9, 11); and the following of hydroxymethylation reactions by UV-Vis spectroscopy were investigated. All lignins resulted attractive for the use as replacement of phenol in phenolic resins, but sodium lignosulfonate was the most appropriate due to its water solubility.

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“…As listed in Table S4, † the presented method has better sensitivity and a much wider linear range for the detection of Fe 3+ compared with the previously reported PL CDbased nanosensors and other uorescent nanoprobes. 42,[52][53][54][55][56][57][58][59][60] Therefore, the as-synthesized N, S-codoped CDs have great potential for the detection of Fe 3+ in real samples.…”

Section: Fluorescence Response Of N S-codoped Cds To Fe 3+mentioning

confidence: 99%

Carbon source self-heating: ultrafast, energy-efficient and room temperature synthesis of highly fluorescent N, S-codoped carbon dots for quantitative detection of Fe(iii) ions in biological samples

et al. 2020

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Biomass-derived nitrogen-doped carbon quantum dots: highly selective fluorescent probe for detecting Fe3+ ions and tetracyclines

Cited by 475 publications

References 95 publications

Green Preparation of Fluorescent Nitrogen-Doped Carbon Quantum Dots for Sensitive Detection of Oxytetracycline in Environmental Samples

Green Preparation of Fluorescent Nitrogen-Doped Carbon Quantum Dots for Sensitive Detection of Oxytetracycline in Environmental Samples

Hydroxymethylation of technical lignins from South American sources with potential use in phenolic resins

Carbon source self-heating: ultrafast, energy-efficient and room temperature synthesis of highly fluorescent N, S-codoped carbon dots for quantitative detection of Fe(iii) ions in biological samples

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