Highly fluorescent graphene quantum dots from biorefinery waste for tri-channel sensitive detection of Fe3+ ions

Wang, Ruibin; Ji, Liang; Zhou, Xuelian; Guo, Z.; Bian, Huiyang

doi:10.1016/j.jhazmat.2021.125096

Cited by 68 publications

(42 citation statements)

References 61 publications

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“…The C–N can be divided into pyridine-N, pyrrole-N, and graphite-N. The pyridine-N and pyrrole-N enable to create lattice defects to the carbon skeleton, and the graphite-N contributes to the replacement of C in the sp 2 carbon domain. ,, The C–N incorporated into the carbon skeleton with its two isolated electrons may increase the electron cloud density in the conjugate π domain and reduce the nonradiative recombination center of the CQDs, ,, thereby enhancing the fluorescence intensity of the three N-doped CQDs in this work (i.e., B-CQDs, G-CQDs, and Y-CQDs). Besides, the PL performances of G-CQDs and Y-CQDs are superior to those of B-CQDs and C-CQDs, which may be due to the complicated synergistic effect of N and S co-doping.…”

Section: Resultsmentioning

confidence: 99%

“…Meanwhile, p -amino-benzenesulfonic acid and lignin were used for CQD preparation through a similar two-step process. The as-synthesized cyan S, N co-doped CQDs with a QY of 20.2% presented sensitive fluorometric detection of Fe 3+ ions . Nevertheless, the production of lignin-derived CQDs is still largely underdeveloped with the bottleneck in the monotonous fluorescence color (blue or green) and the limited fluorescence QY (<21%).…”

Section: Introductionmentioning

confidence: 99%

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Green Synthesis of Tunable Fluorescent Carbon Quantum Dots from Lignin and Their Application in Anti-Counterfeit Printing

Zhu

Shen

Wang

et al. 2021

ACS Appl. Mater. Interfaces

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Lignin converted to carbon quantum dots (CQDs) attracts tremendous attention for large-scale production of carbon nanomaterials and value-added disposal of biomass wastes (such as the black liquor from pulping industry and the residue from hydrolysis of biomass). The green synthesis of lignin-derived CQDs is reported via a facile two-step method with the adjustment of acid additives containing N or S. The resulting series of CQDs exhibit bright fluorescence in gradient colors from blue to yellowish green, among which the N, S co-doped CQDs with the addition of 2,4-diaminobenzene sulfonic acid show an optimal fluorescence quantum yield (QY) of 30.5%. The red-shift photoluminescence emission behaviors of these CQDs can be attributed to the increased graphitization degree and reduced optical energy band gaps (2.47 → 2.17 eV) with regard to the incorporation of various heteroatoms. The improved fluorescence QYs are consistent with the variation trend of the increased N/C content in the CQDs. The yellowish green-emissive CQDs with bright fluorescence, strong water solubility, and excellent chemical stability perform well in anti-counterfeiting printing. The promising and sustainable approach for the synthesis of tunable fluorescent CQDs exhibits the value-added utilization of lignin for the fluorescence ink production.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Green Synthesis of Tunable Fluorescent Carbon Quantum Dots from Lignin and Their Application in Anti-Counterfeit Printing

Zhu

Shen

Wang

et al. 2021

ACS Appl. Mater. Interfaces

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“…Fluorescence turn-off 1.0 μM 2 -400 [30] Ti 3 C 2 MXene QDs Fluorescence turn-off 310 nM 5-1000 [24] Carbon dots Fluorescence turn-off 0.13 μM 0 -100 [31] BNQDs Fluorescence turn-off 0.3 μM 0 -250 [32] Graphene QDs Fluorescence turn-off 1.41 nM 1-1000 [33] Carbon QDs Fluorescence turn-off 0.2 μM 0 -50 [34] BSA@MXene QDs fluorescence quenching of BSA@MXene QDs had taken place through the static quenching mechanism.…”

Section: Ticn Qdsmentioning

confidence: 99%

Bovine serum albumin functionalized blue emitting Ti₃C₂ MXene quantum dots as a sensitive fluorescence probe for Fe³⁺ ion detection and its toxicity analysis

Al-Duais

Mohammedsaleh

Al-Shehri³

et al. 2022

Luminescence

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In the present work, an improved class of protein functionalized fluorescent 2D Ti 3 C 2 MXene quantum dots (MXene QDs) was prepared using a hydrothermal method. Exfoliated 2D Ti 3 C 2 sheets were used as the starting precursor and transport protein bovine serum albumin (BSA) was used to functionalize the MXene QDs. BSAfunctionalized MXene QDs exhibited excellent photophysical property and stability at various physiological parameters. High-resolution transmission electron microscopy analysis showed that the BSA@MXene QDs were quasispherical in shape with a size of $2 nm. The fluorescence intensity of BSA@MXene QDs was selectively quenched in the presence of Fe 3+ ions. The mechanism of fluorescence quenching was further substantiated using time-resolved fluorescence and Stern-Volmer analysis. The sensing assay showed a linear response within the concentration range 0-150 μM of Fe 3+ ions with excellent limit of detection. BSA@MXene QDs probe showed good selectivity toward ferric ions even in the presence of other potential interferences. The practical applicability of BSA@MXene QDs was further tested in real samples for Fe 3+ ion quantification and the sensor had good recovery rates. The cytotoxicity studies of the BSA@MXene QDs toward the human glioblastoma cells revealed that BSA@MXene QDs are biocompatible at lower doses and showed significant cytotoxicity at higher dosages.

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“…GQDs were produced from Miscanthus (MC), a perennial bioenergy crop [ 92 ]. After a preliminary purification stage, MC was treated with p -toluenesulfonic acid in different concentrations at 80 °C for 20, 60, or 120 min.…”

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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Highly fluorescent graphene quantum dots from biorefinery waste for tri-channel sensitive detection of Fe3+ ions

Cited by 68 publications

References 61 publications

Green Synthesis of Tunable Fluorescent Carbon Quantum Dots from Lignin and Their Application in Anti-Counterfeit Printing

Green Synthesis of Tunable Fluorescent Carbon Quantum Dots from Lignin and Their Application in Anti-Counterfeit Printing

Bovine serum albumin functionalized blue emitting Ti₃C₂ MXene quantum dots as a sensitive fluorescence probe for Fe³⁺ ion detection and its toxicity analysis

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

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Highly fluorescent graphene quantum dots from biorefinery waste for tri-channel sensitive detection of Fe3+ ions

Cited by 68 publications

References 61 publications

Green Synthesis of Tunable Fluorescent Carbon Quantum Dots from Lignin and Their Application in Anti-Counterfeit Printing

Green Synthesis of Tunable Fluorescent Carbon Quantum Dots from Lignin and Their Application in Anti-Counterfeit Printing

Bovine serum albumin functionalized blue emitting Ti3C2 MXene quantum dots as a sensitive fluorescence probe for Fe3+ ion detection and its toxicity analysis

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

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Bovine serum albumin functionalized blue emitting Ti₃C₂ MXene quantum dots as a sensitive fluorescence probe for Fe³⁺ ion detection and its toxicity analysis