Preparation, Properties, and Application of Lignocellulosic‐Based Fluorescent Carbon Dots

Song, Xueping; Zhao, Siyu; Xu, Ying; Chen, Xinrui; Wang, Shuangfei; Zhao, Peitao; Pu, Yunqiao; Ragauskas, Arthur J.

doi:10.1002/cssc.202102486

Cited by 20 publications

(21 citation statements)

References 204 publications

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“…Moreover, XPS survey spectrum of CDs-5 depicts five characteristic peaks at about 286.2, 530.0, 1301.9, 133.6, and 399.7 eV, illustrating C, O, Mg, P, and N, accounting for 41.4, 38.3, 11.1, 4.7, and 4.5%, respectively (Figure S5A). From Figure S5B-F, it can be observed that the C 1s of CDs-5 has three peaks, namely, 284.8, 286.0, and 287.1 eV, which can be attributed to CC, C–N, and C–O . O 1s shows two peaks at 529.3 and 531.1 eV, with the presence of CO and C–OH/C–O–C functional groups. , In the Mg 1s diagram, there are two peak centers, namely, 1301.3 and 1302.9 eV.…”

Section: Resultsmentioning

confidence: 95%

Carbon Dot-Based Room-Temperature Phosphorescent Materials for Information Encryption

Guo,

Zhang,

et al. 2023

ACS Appl. Nano Mater.

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Room-temperature phosphorescence (RTP) plays an important role in the field of information encryption due to its ability to effectively eliminate interference caused by background fluorescence (FL). Herein, a series of RTP carbon dots (CDs) containing different nitrogen contents were prepared via a molten salt method. In the reaction system, magnesium chloride and potassium nitrate were used as doping salts to form salt shells, and potassium nitrate was used as salt medium to promote the reaction. By adjusting the amount of melamine, the synthesized CDs-3 exhibit cyan FL and yellow phosphorescence, with a long phosphorescence lifetime of 673.29 ms. It is worth noting that the yellow RTP can be maintained either in dry or wet state, which facilitates for the information encryption. It is suggested that the salt shell composed of magnesium salt with high charge density has a rigid structure, which inhibits the nonradiative transition process of the triplet-state exciton and enhances the phosphorescence intensity. Unfortunately, when the amount of melamine increases to a certain extent, due to the incomplete encapsulation of the salt shell, the phosphorescence of the prepared CDs quenches accordingly. In addition, CDs-3 can also be mixed with epoxy resin to obtain the desired fluorescent/phosphorescent composites. These excellent optical properties indicate that the synthesized CD materials have great development prospects in fields such as anti-counterfeiting and luminescent materials.

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Section: Resultsmentioning

confidence: 95%

Carbon Dot-Based Room-Temperature Phosphorescent Materials for Information Encryption

Guo,

Zhang,

et al. 2023

ACS Appl. Nano Mater.

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“…In the bottom-up method, small molecules or polymers are fused chemically through dehydration or assembly and then condensation or polymerization to obtain certain size CDs with different optical properties [ 39 ]. Additionally, many natural animal or vegetable derivatives can be used as precursors to prepare CDs [ 17 ].…”

Section: Preparation Of Pncdsmentioning

confidence: 99%

Recent Advances of Photoactive Near-Infrared Carbon Dots in Cancer Photodynamic Therapy

et al. 2023

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Photodynamic therapy (PDT) is a treatment that employs exogenously produced reactive oxygen species (ROS) to kill cancer cells. ROS are generated from the interaction of excited-state photosensitizers (PSs) or photosensitizing agents with molecular oxygen. Novel PSs with high ROS generation efficiency is essential and highly required for cancer photodynamic therapy. Carbon dots (CDs), the rising star of carbon-based nanomaterial family, have shown great potential in cancer PDT benefiting from their excellent photoactivity, luminescence properties, low price, and biocompatibility. In recent years, photoactive near-infrared CDs (PNCDs) have attracted increasing interest in this field due to their deep therapeutic tissue penetration, superior imaging performance, excellent photoactivity, and photostability. In this review, we review recent progress in the designs, fabrication, and applications of PNCDs in cancer PDT. We also provide insights of future directions in accelerating the clinical progress of PNCDs.

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“…10 CQDs can be synthesized from lignin. 48 The process is simple, cost-effective, and has the potential to be scaled and commercialized. CQDs take a variety of forms.…”

Section: Introductionmentioning

confidence: 99%

Selective Carbon Dioxide Binding on Carbon Quantum Dots

Broud,

Samandari,

et al. 2023

J. Phys. Chem. C

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Mitigating the most extreme potential effects of climate change due to fossil fuel burning requires unprecedented global carbon sequestration. The materials used for carbon capture must be renewable, economically feasible, abundant, and recyclable with the ability to recover the adsorbed gas. Carbon quantum dots (CQD) are evaluated as materials to decorate the interior pore space of model carbon surfaces to achieve selective carbon dioxide adsorption from gas mixtures. We used classical molecular dynamics (MD) simulation to evaluate the effect of CQD size and composition on the selectivity of CO 2 relative to N 2 and O 2 . The CQDs are modified either through nitrogen doping of the interior aromatic structure or functionalization of the edges with amine groups. CQDs show selective adsorption for CO 2 relative to N 2 and O 2 in all cases. The magnitude of the selectivity is a function of CQD size and the amount of doping and functionalization. In this exploratory study, a maximum CO 2 :N 2 selectivity of 4.3 and CO 2 :O 2 selectivity of 3.1 were obtained on isolated CQDs at 300 K without structural optimization. This preliminary computational study sets the framework for optimizing the CQD atomic architecture on a CQD/AC adsorbent.

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Preparation, Properties, and Application of Lignocellulosic‐Based Fluorescent Carbon Dots

Cited by 20 publications

References 204 publications

Carbon Dot-Based Room-Temperature Phosphorescent Materials for Information Encryption

Carbon Dot-Based Room-Temperature Phosphorescent Materials for Information Encryption

Recent Advances of Photoactive Near-Infrared Carbon Dots in Cancer Photodynamic Therapy

Selective Carbon Dioxide Binding on Carbon Quantum Dots

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