Green synthesis of surface-group-tunable red emissive carbon dots and their applications for Fe3+ and pyrophosphate detection

Li, Xiang; Yan, Xiu Fang; Wang, Conghui; Ma, Yunxiao; Jiang, Y.; Wang, Rongjing; Shi, Dongyang; Li, Zhongjian; Zhu, Guonian; Teng, Bing

doi:10.1016/j.microc.2022.108123

Cited by 8 publications

(6 citation statements)

References 38 publications

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“…In addition to this, the Zeta potentials of CDs, G‐CDs and G‐CDs+Fe 3+ were also studied (Figure 9c), the Zeta potential of G‐CDs was higher than that of CDs, probably due to the introduction of imine bonds that neutralise some of the negative potential of CDs, which further supports the success of the modification. Meanwhile, after adding Fe 3+ to G‐CDs, the Zeta potential became positive, indicating that Fe 3+ could be adsorbed on the surface of G‐CDs to increase the potential of G‐CDs [46] . To further verify this mechanism, FT‐IR spectra of G‐CDs before and after being mixed with Fe 3+ was recorded (Figure 9d).…”

Section: Resultsmentioning

confidence: 89%

“…Meanwhile, after adding Fe 3 + to G-CDs, the Zeta potential became positive, indicating that Fe 3 + could be adsorbed on the surface of G-CDs to increase the potential of G-CDs. [46] To further verify this mechanism, FT-IR spectra of G-CDs before and after being mixed with Fe 3 + was recorded (Figure 9d). The results showed that the characteristic peak shape of G-CDs did not change after the addition of a small amount of trivalent iron ions, but the intensity became significantly weaker, indicating that the addition of Fe consumed part of the amide bond of G-CDs.…”

Section: Possible Mechanism Of Fluorescence Quenching For Fe 3 +mentioning

confidence: 93%

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Detection of Amaranth and Iron in Foods by Modified Carbon Quantum Dots as a Ratiometric Fluorescence Probe

Hu,

Kuang,

Yuan

et al. 2024

ChemistrySelect

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In this work, a new carbon quantum dots (CDs) was prepared though microwave assisted approach using citric acid anhydrous (CA) and N‐[3‐(Trimethoxysilyl)propyl] ethylenediamine (TPED) as raw materials. However, the CDs was not effective in actual sensing applications, so further modification of CDs was done by 3,5‐Dichloro‐2‐hydroxybenzaldehyde (it was named as G‐CDs). Fortunately, the modified CDs (G‐CDs) has good selectivity for Fe3+ and amaranth. Studies confirmed that Fe3+ could quench the fluorescence of G‐CDs by forming a complex, while the fluorescence quenching mechanism of G‐CDs by amaranth (AM) mainly belonged to the internal filtering effect (IFE). A detection limit of 20.8 nM for Fe3+ and 43.8 nM for AM were achieved. Moreover, the as‐developed G‐CDs probe was also successfully used to detect Fe3+ and amaranth in real samples, and compared with their results by the standard method, hinting that the accuracy and reliability of the probe were highly satisfactory.

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Section: Resultsmentioning

confidence: 89%

Section: Possible Mechanism Of Fluorescence Quenching For Fe 3 +mentioning

confidence: 93%

Detection of Amaranth and Iron in Foods by Modified Carbon Quantum Dots as a Ratiometric Fluorescence Probe

Hu,

Kuang,

Yuan

et al. 2024

ChemistrySelect

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“…We have cited additional references within the Supporting Information [51–88] . The Supporting Information includes: 1.…”

Section: Supporting Information Summarymentioning

confidence: 99%

Rose Bengal‐Derived Carbon Quantum Dots as a Fluorescence Probe for the Highly Sensitive Detection of Fe³⁺ Ions

Li,

Zhang,

et al. 2023

ChemistrySelect

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In this study, rose bengal‐derived carbon quantum dots (RB‐CQDs) was synthesized by a one‐step solvothermal method using rose bengal and 1,2‐phenylenediamine as precursors in ethanol at 180 °C for 10 h and purified by silica gel chromatography. The as‐synthesized RB‐CQDs disperses well in water with particle sizes ranging from 0.78 to 2.46 nm and exhibits excitation‐independent yellow fluorescent emission (529 nm), high quantum yield (44.3 %) and good biocompatibility. More importantly, the fluorescence of RB‐CQDs can be selectively quenched by Fe3+ ions with good linear correlation and the detection limit is 19.9 nM. The recoveries of this method in actual water samples are 90 % to 110 % with relative standard deviations less than 5 %.

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“…Carbon dots belong to zero-dimensional materials with quasi-spherical shapes, and their sizes are below 10 nm [ 2 , 3 , 4 ]. They have had considerable attention in recent years due to their attractive characteristics such as excellent water dispersibility, multicolor fluorescence emissions, prolonged colloidal durability in aqueous media, excellent photostability, good biocompatibility, cost-effective production, unique chemical inertness, and tunable surface functionalities [ 5 , 6 , 7 , 8 , 9 ]. Moreover, the synthesis process of carbon dots does not involve any hazardous heavy metals; hence, it is environmentally friendly.…”

Section: Introductionmentioning

confidence: 99%

“…Iron intake mostly comes from food such as vegetables, fruit, eggs, and milk. The excess and deficiency of iron in the human body can cause physiological damage and biological disorders, which perhaps result in several serious diseases such as anemia, diabetes, arthritis, hemochromatosis, a lower immunity, a lower blood pressure, liver cirrhosis, heart disease, kidney failure, and even cancer [ 5 , 10 , 27 ]. The level of iron in the body needs to be monitored and maintained at an appropriate range for sustaining the function of our body.…”

Section: Introductionmentioning

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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Green synthesis of surface-group-tunable red emissive carbon dots and their applications for Fe3+ and pyrophosphate detection

Cited by 8 publications

References 38 publications

Detection of Amaranth and Iron in Foods by Modified Carbon Quantum Dots as a Ratiometric Fluorescence Probe

Detection of Amaranth and Iron in Foods by Modified Carbon Quantum Dots as a Ratiometric Fluorescence Probe

Rose Bengal‐Derived Carbon Quantum Dots as a Fluorescence Probe for the Highly Sensitive Detection of Fe³⁺ Ions

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

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Green synthesis of surface-group-tunable red emissive carbon dots and their applications for Fe3+ and pyrophosphate detection

Cited by 8 publications

References 38 publications

Detection of Amaranth and Iron in Foods by Modified Carbon Quantum Dots as a Ratiometric Fluorescence Probe

Detection of Amaranth and Iron in Foods by Modified Carbon Quantum Dots as a Ratiometric Fluorescence Probe

Rose Bengal‐Derived Carbon Quantum Dots as a Fluorescence Probe for the Highly Sensitive Detection of Fe3+ Ions

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

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Rose Bengal‐Derived Carbon Quantum Dots as a Fluorescence Probe for the Highly Sensitive Detection of Fe³⁺ Ions