Biomass-derived nitrogen self-doped carbon dots via a simple one-pot method: Physicochemical, structural, and luminescence properties

Liu, Yinghui; Zhu, Chong; Gao, Ying; Yang, Li; Xu, Jiayu; Zhang, Xitong; Lu, Chunmei; Wang, Yinfeng; Zhu, Yuezhao

doi:10.1016/j.apsusc.2020.145437

Cited by 109 publications

(48 citation statements)

References 35 publications

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“…30,31 Different from the most reported carbon nanodots, [32][33][34] the narrowed full width at the half maximum (∼40 nm) and the excitation-independent emission of the NFNCBs (Fig. 3B) may be ascribe to the content of the aromatic heterocyclic nitrogen of C=N and the surface of the N-containing groups, 35 which can be regulated through selecting the precursor and regulating the experimental condition during hydrothermal reactions. Varying the excitation range from 260 to 310 nm displays that the emission peaks of the NFNCBs are excitation-independent emission and the strongest FL emission peak is located at 327 nm with excitation at 300 nm.…”

Section: Characterization and Optical Properties Of The Nfncbsmentioning

confidence: 85%

On-off Fluorescent Switching of Excitation-independent Near-ultraviolet Emission Carbon Nanobelts for Ultrasensitive Detection Nimesulide in Pharmaceutical Tablet

et al. 2020

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Here, we present an excellent strategy of unmodified near-ultraviolet fluorescence nitrogen doping carbon nanobelts (NFNCBs) for detecting nimesulide (Nim). After a simple hydrothermal process of uric acid and hydroquinone in DMF solvent, NFNCBs shows the shape of corroded stalactite-like composed of nanobelts aggregates, near-ultraviolet luminescence and a narrowed full width at half maximum. This could improve/change the electronic properties and surface chemical active site, as the result of a sensitive response to Nim. By employing this sensor, the quantitative measurement displays a linear range of 2.0 nM-100.0 μM with a lower detection limit of 0.21 nM (3σ/k) for Nim. Our work has provided a high selectivity for Nim, which may be capable for pharmaceutical sample analysis in real tablets. Furthermore, the results concerning the recoveries (96.3-106.2%) for real sample analysis indicate that this nanoprobe might expand a good avenue to design an effective luminescence nanoprobe for other biologically related drugs.

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Section: Characterization and Optical Properties Of The Nfncbsmentioning

confidence: 85%

On-off Fluorescent Switching of Excitation-independent Near-ultraviolet Emission Carbon Nanobelts for Ultrasensitive Detection Nimesulide in Pharmaceutical Tablet

et al. 2020

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“…The Raman spectra of the PC-CDs is presented in Figure 2 A, revealing a D band around 1371 cm −1 and a strong G band at 1582 cm −1 , attributed to the sp 3 defects and sp 2 hybridized carbon atoms in the PC-CDs material [ 50 , 51 ]. The intensity ratio of the two bands (I D /I G ) was calculated to be 0.87 which highlights the high crystallinity of PC-CDs cleared of any carbonaceous impurities [ 29 , 52 ].…”

Section: Resultsmentioning

confidence: 99%

One-Step Green Synthesis of Water-Soluble Fluorescent Carbon Dots and Its Application in the Detection of Cu2+

et al. 2022

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Renewable biowaste-derived carbon dots have garnered immense interest owing to their exceptional optical, fluorescence, chemical, and environmentally friendly attributes, which have been exploited for the detection of metals, non-metals, and organics in the environment. In the present study, water-soluble fluorescent carbon dots (CDs) were synthesized via facile green microwave pyrolysis of pine-cone biomass as precursors, without any chemical additives. The synthesized fluorescent pine-cone carbon dots (PC-CDs) were spherical in shape with a bimodal particle-size distribution (average diameters of 15.2 nm and 42.1 nm) and a broad absorption band of between 280 and 350 nm, attributed to a π-π* and n-π* transition. The synthesized PC-CDs exhibited the highest fluorescent (FL) intensity at an excitation wavelength of 360 nm, with maximum emission of 430 nm. The synthesized PC-CDs were an excellent fluorescent probe for the selective detection of Cu2+ in aqueous solution, amidst the presence of other metal ions. The FL intensity of PC-CDs was exceptionally quenched in the presence of Cu2+ ions, with a low detection limit of 0.005 μg/mL; this was largely ascribed to Cu2+ ion binding interactions with the enriched surface functional groups on the PC-CDs. As-synthesized PC-CDs are an excellent, cost effective, and sensitive probe for detecting and monitoring Cu2+ metal ions in wastewater.

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“…1a, the TEM images showed that the four kinds of GQDs gave a narrow size distribution with well monodisperse, which indicated their high quality. Clear lattice fringes exhibited their graphitic structure with lattice spacing (d = 0.21nm, 0.24 nm) corresponding to (100) diffraction facets of graphite [44][45][46]. Data of XPS full spectrum scan showed that GOQDs were among the most complex in the atomic ratio, including C1s (44.21%), O1s (34.59%), Na1s (6.79%), Si2p (8%), Cl2p (2.44%), S2p (2.28%), and Sc2p (6.11%), whilst C-GQDs contained only C1s (58.13%) and O1s (41.87%) (Fig.…”

Section: Resultsmentioning

confidence: 99%

Integrated mRNA and microRNA transcriptomic analysis reveals the common and individual responses of zebrafish embryos exposed to four types of graphene quantum dots (GQDs)

Deng

Zhang

Zhao

et al. 2021

Preprint

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Background: Graphene quantum dots (GQDs) have great potential for bioimaging, biosensor, drug carrier, theranostics, and are recently reported as therapeutic agents to treat amylosis and inflammation. Most types of GQDs have proven low toxicity in previous studies, but data about the transcriptomic responses of in vivo systems exposed to various GQDs remains largely unknown. Results: We examined the mRNA and microRNA (miRNA) expression changes of zebrafish embryos exposed to four types of GQDs at a safe concentration (100 µg/mL), respectively as raw graphene quantum dots (R-GQDs), graphene oxide quantum dots (GOQDs), carboxyl GQDs (C-GQDs), and aminated GQDs (A-GQDs). The four GQDs elicited the number of differentially expressed genes (DEGs) in a decreasing order of A-GQDs, GOQDs, C-GQDs and R-GQDs to act on protein folding, potassium (K+) and calcium (Ca2+) channels, and spliceosome to varying degrees. Among the four GQDs, A-GQDs caused more genotoxic effects associated with lipid and hormone metabolism, MAPK signaling pathway, complement system, and ferropotosis. miRNA-seq data revealed that GOQDs aroused more differentially expressed miRNAs (DEMs), far exceed the total number of DEMs induced by the other three GQDs. dre-miR-735-5p and its potentially interactive gene-myogenin (myog) were identified as the only negatively-correlated miRNA-target gene pair shared by the four GQDs treatments. Conclusion: Taken together, this study provided substantial data underlying the common and specific transcriptomic responses of in vivo systems exposed to various types of GQDs, and also indicated the potential medicinal values of GQDs for ion antagonists and spliceosome-targeted therapies.

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Biomass-derived nitrogen self-doped carbon dots via a simple one-pot method: Physicochemical, structural, and luminescence properties

Cited by 109 publications

References 35 publications

On-off Fluorescent Switching of Excitation-independent Near-ultraviolet Emission Carbon Nanobelts for Ultrasensitive Detection Nimesulide in Pharmaceutical Tablet

On-off Fluorescent Switching of Excitation-independent Near-ultraviolet Emission Carbon Nanobelts for Ultrasensitive Detection Nimesulide in Pharmaceutical Tablet

One-Step Green Synthesis of Water-Soluble Fluorescent Carbon Dots and Its Application in the Detection of Cu2+

Integrated mRNA and microRNA transcriptomic analysis reveals the common and individual responses of zebrafish embryos exposed to four types of graphene quantum dots (GQDs)

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