Multifunctional N-doped graphene quantum dots towards tetracycline detection, temperature sensing and high-performance WLEDs

Yang, Yongsheng; Liu, Zhiduo; Chen, Da; Gu, Bingli; Gao, Bo; Wang, Zihao; Guo, Qinglei; Wang, Gang

doi:10.1016/j.jphotochem.2020.112977

Cited by 37 publications

(10 citation statements)

References 45 publications

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“…The reason may be that the incorporation of EDA replaces some of the oxygen-containing functional groups on the original quantum dots. 33,34 This result is mutually confirmed with FT-IR. The reason may be that the inclusion of EDA replaces some of the oxygen-containing functional groups on the original GQDs.…”

Section: Effects Of Synthesis and Test Conditions On N-gqdssupporting

confidence: 73%

“…When the excitation wavelength gradually increases from 320 to 500 nm (step size is 10 nm), the emission wavelength redshifts from 450 to 545 nm. The origin of this phenomenon is still controversial, but it is believed to be caused by specific surface defects or red edge effects caused by functional groups . As shown in Figure e, the 3D fluorescence spectrum shows that the maximum fluorescence center is located at the (410, 480) coordinate.…”

Section: Resultsmentioning

confidence: 99%

“…The origin of this phenomenon is still controversial, but it is believed to be caused by specific surface defects or red edge effects caused by functional groups. 34 As shown in Figure 4e, the 3D fluorescence spectrum shows that the maximum fluorescence center is located at the (410, 480) coordinate. Asymmetric fluorescence emission circles further indicate that the N-GQDs have excitation wavelength dependence.…”

Section: Effects Of Synthesis and Test Conditions On N-gqdsmentioning

confidence: 86%

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Cane Molasses Derived N-Doped Graphene Quantum Dots: Dynamic Quenching Synergistically Photoinduced Electron Transfer for the Instant Detection of Nitrofuran Antibiotics

et al. 2023

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The development of a highly selective, simple, and rapid detection method for nitrofuran antibiotics (NFs) is of great significance for food safety, environmental protection, and human health. To meet these needs, in this work, cyan-color highly fluorescent N-doped graphene quantum dots (N-GQDs) were synthesized using cane molasses as the carbon source and ethylenediamine as the nitrogen source. The synthesized N-GQDs have an average particle size of 6 nm, a high fluorescence intensity with 9 times that of undoped GQDs, and a high quantum yield (24.4%) which is more than 6 times that of GQDs (3.9%). A fluorescence sensor based on N-GQDs for the detection of NFs was established. The sensor shows advantages of fast detection, high selectivity, and sensitivity. The limit of detection for furazolidone (FRZ) was 0.29 μM, the limit of quantification (LOQ) was 0.97 μM, and the detection range was 5−130 μM. The fluorescence quenching mechanism of the sensor was explored by fluorescence spectroscopy, UV−vis absorption spectroscopy, Stern−Volmer quenching constant, Zeta potential, UV−vis diffuse reflectance spectroscopy, and cyclic voltammetry. A fluorescence quenching mechanism of dynamic quenching synergized with photoinduced electron transfer was revealed. The developed sensor was also successfully applied for detecting FRZ in various real samples, and the results were satisfactory.

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Section: Effects Of Synthesis and Test Conditions On N-gqdssupporting

confidence: 73%

Section: Resultsmentioning

confidence: 99%

Section: Effects Of Synthesis and Test Conditions On N-gqdsmentioning

confidence: 86%

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Cane Molasses Derived N-Doped Graphene Quantum Dots: Dynamic Quenching Synergistically Photoinduced Electron Transfer for the Instant Detection of Nitrofuran Antibiotics

et al. 2023

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“…Heating of benzimidazole dispersed in absolute ethanol for 6 h at 180 °C resulted in N-GQDs formation [ 68 ]. Dots emitted blue light (430 nm) at excitation of 370 nm and showed a very high PL QY of 25%.…”

Section: Graphene Quantum Dots Synthetic Strategiesmentioning

confidence: 99%

Shedding Light on Graphene Quantum Dots: Key Synthetic Strategies, Characterization Tools, and Cutting-Edge Applications

2021

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During the last 20 years, the scientific community has shown growing interest towards carbonaceous nanomaterials due to their appealing mechanical, thermal, and optical features, depending on the specific nanoforms. Among these, graphene quantum dots (GQDs) recently emerged as one of the most promising nanomaterials due to their outstanding electrical properties, chemical stability, and intense and tunable photoluminescence, as it is witnessed by a booming number of reported applications, ranging from the biological field to the photovoltaic market. To date, a plethora of synthetic protocols have been investigated to modulate the portfolio of features that GQDs possess and to facilitate the use of these materials for target applications. Considering the number of publications and the rapid evolution of this flourishing field of research, this review aims at providing a broad overview of the most widely established synthetic protocols and offering a detailed review of some specific applications that are attracting researchers’ interest.

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“…34,35 In recent years, Qu et al proposed a blue fluorescent carbon quantum dot for the indirect detection of tetracycline in foods; 36 Yang and coworkers prepared N-GQDs with blue fluorescence emission for the detection of tetracycline. 37 However, the lack of sensitivity of the above detection methods remains to be addressed. Ju et al reported a method for the synthesis of N-GQDs from citric acid and dicyandiamide, which requires a complex post-treatment process; 38 Fan and co-workers proposed to obtain graphene quantum dots by oxidizing graphene flakes with concentrated nitric acid for 20 h and then reducing them with NaBH 4 for 12 h. The acid residue of the product in this method is not easy to handle and the long experimental time is still to be solved.…”

Section: Introductionmentioning

confidence: 99%

Green synthetic nitrogen-doped graphene quantum dot fluorescent probe for the highly sensitive and selective detection of tetracycline in food samples

You

Qian

et al. 2022

RSC Adv.

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Multifunctional N-doped graphene quantum dots towards tetracycline detection, temperature sensing and high-performance WLEDs

Cited by 37 publications

References 45 publications

Cane Molasses Derived N-Doped Graphene Quantum Dots: Dynamic Quenching Synergistically Photoinduced Electron Transfer for the Instant Detection of Nitrofuran Antibiotics

Cane Molasses Derived N-Doped Graphene Quantum Dots: Dynamic Quenching Synergistically Photoinduced Electron Transfer for the Instant Detection of Nitrofuran Antibiotics

Shedding Light on Graphene Quantum Dots: Key Synthetic Strategies, Characterization Tools, and Cutting-Edge Applications

Green synthetic nitrogen-doped graphene quantum dot fluorescent probe for the highly sensitive and selective detection of tetracycline in food samples

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