Synthesis of nitrogen-doped carbon dots with 3-aminoquinoline and citric acid as an absorbent in full ultraviolet bands and application of transparent sunscreen umbrella

Xu, Yulin; Xu, Zhiqiang; Chen, Congcong; Ye, Weihao; Guo, Baocheng; Qiu, Jiemin; Zhuang, Jianle; Hu, Chaofan; Lei, Bingfu; Hu, Gang; Liu, Yingliang

doi:10.1016/j.dyepig.2023.111204

Cited by 9 publications

(3 citation statements)

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“…The D band indicated the existence of sp 3 -hybridized C–C bonds, and the G band indicated the existence of sp 2 -hybridized CC bonds . The intensity ratio of two bands ( I D / I G ) was calculated to be 1.3, suggesting a high degree of carbonization . The X-ray photoelectron spectroscopy (XPS) spectra were utilized to analyze the surface states and chemical bonds of the N-CQDs.…”

Section: Resultsmentioning

confidence: 99%

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Nitrogen-Doped Carbon Quantum Dots with Photoactivation Properties for Ultraviolet Ray Detection

Liao,

Qi,

Gao

et al. 2024

ACS Appl. Mater. Interfaces

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Photoactivation is a phenomenon that could enhance the photoluminescence (PL) and photostability upon UV/vis light exposure, which is usually observed in CdSe/ZnS quantum dots (QDs). However, the photoactivation phenomenon has been scarcely reported in fluorescent carbon quantum dots (CQDs). Herein, the nitrogen-doped carbon quantum dots (N-CQDs) were prepared through a facile solvothermal approach with naphthalenetracarboxylic dianhydride and serine as precursors. Upon simple UV light irradiation for 10 min, the fluorescence quantum yield (QY) of N-CQDs could increase up to 10-fold. Based on this phenomenon, the N-CQDs were explored as an ultraviolet (UV) light sensor to assess the intensity of ultraviolet radiation in sunlight and indirectly evaluate the UVblocking efficiency of various sunscreen products. Thus, this contribution not only provided an insight into developing a low-cost UV detector but also opened a door for the development of carbon quantum dots with converse-photobleaching properties.

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Section: Resultsmentioning

confidence: 99%

“…39 The intensity ratio of two bands (I D /I G ) was calculated to be 1.3, suggesting a high degree of carbonization. 40 The X-ray photoelectron spectroscopy (XPS) spectra were utilized to analyze the surface states and chemical bonds of the N-CQDs.…”

Section: Characterization Of N-cqdsmentioning

confidence: 99%

Nitrogen-Doped Carbon Quantum Dots with Photoactivation Properties for Ultraviolet Ray Detection

Liao,

Qi,

Gao

et al. 2024

ACS Appl. Mater. Interfaces

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“…Among these properties, the absorption of UV for CDs is a newly developed process in recent years. Our research group has also carried out many studies on the UV absorption properties of CDs and applied them in the fields of UV shielding, − sunscreen, healthy light source lamps, and so on. Hu et al synthesized full-band UV-absorbent water-soluble (NH,OH)-functionalized silicon quantum dots, investigated its stability, and compared their stability and UV absorptivity with commercial water-soluble UV absorbents .…”

Section: Introductionmentioning

confidence: 99%

Oil-Soluble Ultraviolet-Absorbing Carbon Dots Dispersed in Polyethylene Films as Antiaging Materials

Qiu

et al. 2023

ACS Appl. Nano Mater.

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Ultraviolet (UV) absorbents are widely used in coatings and polymers owing to their remarkable absorbance of UV irradiation. As a new type of organic UV absorbent, carbon dots (CDs) have presented outstanding UV absorption properties. However, the use of water-soluble reactants in the synthesis process of most CDs makes them easy to dissolve in water, which is not conducive to their use in the field of thin films. In this paper, we report an effective hydrothermal method to prepare threecomponent carbon dots (Im-CDs) from sodium citrate, ethylenediamine, and imidazole and then modify the surface to obtain the final product (AOT-CDs) by docusate sodium. The AOT-CDs exhibited a strong UV absorption capacity to UVA and UVB but a transmittance in the visible region both in solution and in polymers. In addition, docusate sodium is regarded as a suitable surface modifier to transfer Im-CDs from water to various organic solvents. When the excellent oil-soluble AOT-CDs are applied to a polyethylene film, the properties of the films, including the efficiency of UV shielding, mechanical property, and aging time, can be effectively tuned by changing the concentration of AOT-CDs. Our full-band UV-shielding films with CDs show no obvious degradation in the process of accelerated UV aging for dozens of days. Due to their ecofriendliness and good chemical and thermal stability in films, AOT-CDs are expected to become competitive candidates for next-generation UV absorbents.

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Green synthesis of carbon dots by microflow method and their application as sunscreen agent

Li,

Miao,

Shen

et al. 2025

Chinese Journal of Chemical Engineering

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Synthesis of nitrogen-doped carbon dots with 3-aminoquinoline and citric acid as an absorbent in full ultraviolet bands and application of transparent sunscreen umbrella

Cited by 9 publications

References 50 publications

Nitrogen-Doped Carbon Quantum Dots with Photoactivation Properties for Ultraviolet Ray Detection

Nitrogen-Doped Carbon Quantum Dots with Photoactivation Properties for Ultraviolet Ray Detection

Oil-Soluble Ultraviolet-Absorbing Carbon Dots Dispersed in Polyethylene Films as Antiaging Materials

Green synthesis of carbon dots by microflow method and their application as sunscreen agent

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