A novel and highly stable dual-emission carbon dots-based phosphor

Cao, Mengmeng; Liu, Yunpeng; Zhu, Mengmeng; Xia, Jinfeng; Xuan, Tongtong; Jiang, Danyu; Zhou, Guohong; Li, Huili

doi:10.1016/j.jallcom.2021.159819

Cited by 11 publications

(4 citation statements)

References 60 publications

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“…The band gap of gCDs was found to be 3.34 and 3.30 eV for RCDs and APCDs, respectively. These values are consistent with those in works already published [ 33 , 34 , 35 , 36 ]. The meaning of these data concerning the reactivity of the gCDs [ 37 ] in the context of the present paper has been discussed in detail in the Supplementary Information .…”

Section: Resultssupporting

confidence: 93%

Green Carbon Dots as Additives of Biopolymer Films for Preserving from Oxidation of Oil-Based Products

et al. 2022

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The deterioration of oil-based products during processing, distribution and storage has a major negative impact on the industry from an economic point of view. The spoilage of oil is mainly due to its oxidation which can be triggered by various factors, such as UV light, heating or the presence of impurities that result in the formation of radical species. In this context, several packaging alternatives have recently been developed with the aim to protect and extend the shelf life of oil-based products. This work aimed to study the antioxidant properties of bio-polymer-based films (BPFs) obtained from high methoxylated pectin (HMP) and sodium caseinate (CAS) and enriched with different concentrations of green carbon dots (gCDs), 0.25%, 0.50 and 1% w/w, obtained from apple pomace (APCDs) and rosemary powder (RCDs). The resulting films (gCDs-BPFs) have shown that the presence of gCDs not only modified the surface roughness of the films, but also positively affected their antioxidant properties. The addition of gCDs enhanced the radical inhibiting capacity of the raw BPFs by 42 and 62% for the films containing 1% RCDs and 1% APCDs, respectively. As a proof of the concept, two oil samples (edible and cosmetic) were treated with the obtained antioxidant films, and the results demonstrated that in both types of samples the oxidation process was minimized during the five days of the experiment. These results are promising and suggest that the antioxidant bio-polymer-based films could be excellent candidates for further production of active packaging.

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Section: Resultssupporting

confidence: 93%

Green Carbon Dots as Additives of Biopolymer Films for Preserving from Oxidation of Oil-Based Products

et al. 2022

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“…The appearance of the N 1s peak at 399.9 eV originated from the introduction of APTEs. 26,27 As outlined earlier, ZnO QDs underwent successful modification through a silane coupling agent. In theory, SiO 2 formation occurs subsequent to the generation of ZnO QDs, potentially encapsulating the ZnO QDs surface to enhance its environmental resistance.…”

Section: Characterizationsmentioning

confidence: 99%

Sensitive detection of dissolved oxygen in seawater by fluorometric sensing based on ZnO-NH₂@SiO₂ QDs

Cao,

Lv,

et al. 2024

J. Mater. Chem. C

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“…At the same time, poor luminescence stability of Mn 4+ -activated fluoride red-emitting phosphors in the humid environment is also a core problem that hinders the rapid development of fluorescent materials for WLEDs. , WLEDs often work in high-humidity environments, and the humidity will promote the luminescent center [MnF 6 ] 2– group to hydrolysis and then make phosphor lose its ability to emit light. , In order to obtain good water resistance of phosphor, a lot of work has been done. − For example, organic ,,, or inorganic − coating on the surface of phosphors can effectively improve their water resistance. In addition, the water resistance can be improved by the surface passivation of the phosphor with a reducing agent because a rare-Mn 4+ layer is formed on the surfaces. , Noticeably, Zhang’s group reported that phosphors not only had good water resistance but also had high QY and luminescent thermal stability when they were present in the single crystal form because of the in situ formation of the rare-Mn 4+ layer on their surfaces.…”

Section: Introductionmentioning

confidence: 99%

“…At the same time, poor luminescence stability of Mn 4+activated fluoride red-emitting phosphors in the humid environment is also a core problem that hinders the rapid development of fluorescent materials for WLEDs. 27,28 WLEDs often work in high-humidity environments, and the humidity will promote the luminescent center [MnF 6 ] 2− group to hydrolysis and then make phosphor lose its ability to emit light. 29,30 In order to obtain good water resistance of phosphor, a lot of work has been done.…”

Section: Introductionmentioning

confidence: 99%

High Water Resistance and Luminescent Thermal Stability of Li_yNa_(2–y)SiF₆: Mn⁴⁺ Red-Emitting Phosphor Induced by Codoping of Li⁺

et al. 2022

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Mn 4+ -doped fluoride phosphors are efficient narrowband red-emitting phosphors for white light-emitting diodes (WLEDs) and backlight displays. However, erosion by moisture is the main obstacle that l i m i t s t h e i r a p p l i c a t i o n . I n t h i s w o r k , L N S F : M n 4 + (Li 0.06 Na 1.94 Si 0.94 Mn 0.06 F 6 ) with high quantum yield (QY), luminescent thermal stability, and waterproofness was synthesized using the H 2 O 2 -free r e a c t i o n m e t h o d a t r o o m t e m p e r a t u r e . C o m p a r e d t o NSF:Mn 4+ (Na 2 Mn 0.06 Si 0.94 F 6 ), the QY value, luminescence thermal stability, and water resistance of LNSF:Mn 4+ are obviously improved by codoping of Li + because of the formation of charge-carrier transfer (CT) and rare-Mn 4+ layer induced by codoping of Li + . The former produces the negative thermal quenching (NTQ) effect, which results in the improvement of the luminescent thermal stability. The latter can inhibit the hydrolysis of Mn 4+ on the surface of the sample, which leads to the enhancement of waterproofness. The formation mechanism of the rare-Mn 4+ layer is discussed. A prototype WLED emitting the ideal warm white light (CCT = 3173 K, Ra = 90.4) was assembled by coating a mixture of LNSF:Mn 4+ , yellow emitting phosphor (YAG:Ce 3+ ), and epoxy resin on the blue light InGaN chip, indicating that the performance of the WLED can be improved by using LNSF:Mn 4+ .

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A novel and highly stable dual-emission carbon dots-based phosphor

Cited by 11 publications

References 60 publications

Green Carbon Dots as Additives of Biopolymer Films for Preserving from Oxidation of Oil-Based Products

Green Carbon Dots as Additives of Biopolymer Films for Preserving from Oxidation of Oil-Based Products

Sensitive detection of dissolved oxygen in seawater by fluorometric sensing based on ZnO-NH₂@SiO₂ QDs

High Water Resistance and Luminescent Thermal Stability of Li_yNa_(2–y)SiF₆: Mn⁴⁺ Red-Emitting Phosphor Induced by Codoping of Li⁺

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A novel and highly stable dual-emission carbon dots-based phosphor

Cited by 11 publications

References 60 publications

Green Carbon Dots as Additives of Biopolymer Films for Preserving from Oxidation of Oil-Based Products

Green Carbon Dots as Additives of Biopolymer Films for Preserving from Oxidation of Oil-Based Products

Sensitive detection of dissolved oxygen in seawater by fluorometric sensing based on ZnO-NH2@SiO2 QDs

High Water Resistance and Luminescent Thermal Stability of LiyNa(2–y)SiF6: Mn4+ Red-Emitting Phosphor Induced by Codoping of Li+

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Sensitive detection of dissolved oxygen in seawater by fluorometric sensing based on ZnO-NH₂@SiO₂ QDs

High Water Resistance and Luminescent Thermal Stability of Li_yNa_(2–y)SiF₆: Mn⁴⁺ Red-Emitting Phosphor Induced by Codoping of Li⁺