“All-in-One” Carbon Dot-Based Catalyst for Converting Co2 to Cyclic Carbonates

Wang, Ruijia; Wan, Jianyong; Guo, Hongda; Tian, Bing; Li, Shujun; Li, Jian; Liu, Shouxin; James, Tony D.; Chen, Zhijun

doi:10.2139/ssrn.4371935

“…As the pressure of CO 2 increased from 0.1 MPa to 1 MPa, the yield of 4‐phenyl‐1, 3‐dioxolan‐2‐one remained essentially constant (Figure 3b). The concentration of carbon dioxide does not affect the cyclization reaction of carbon dioxide because the carbon dots are enriched with amino groups on the surface of carbon dots and TBAB [55] together made carbon dots get good catalytic results at 0.1 MPa CO 2 . As the reaction time extended from 0.5 h to 1.5 h, the yield of 4‐phenyl‐1,3‐dioxolan‐2‐one improved from 67.6 % to 97.0 % (Figure 3c).…”

Section: Resultsmentioning

confidence: 99%

Carbon Dots as New Effective Catalysts for Knoevenagel Condensation Reaction and Synthesis of Cyclic Carbonates under Solvent‐free Conditions

Yu,

Luo,

Sun

2024

ChemistrySelect

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Carbon dots (CDs) as new efficient catalysts have been developed for the Knoevenagel condensation reaction and the synthesis of cyclic carbonates under solvent‐free conditions. Six kinds of carbon dots with different numbers of amino groups were synthesized. The amine‐terminated carbon dot (NCDs‐1) was synthesized using arginine and ethylenediamine by a microwave technique, and its catalytic action was studied. NCDs‐1 with the highest numbers of amino groups was used as new metal‐free and effective heterogeneous catalysts to perform essential Knoevenagel condensation and cycloaddition reactions in solvent‐free conditions. 1H NMR was used to demonstrate the Knoevenagel condensation mechanism, in situ Fourier infrared spectroscopy was used to investigate CO2 cycloaddition and a catalytic mechanism was postulated. NCDs‐1 showed a yield of 96.3±1.5 % for Knoevenagel condensation of benzaldehyde and malononitrile. In addition, NCDs‐1/TBAB showed a yield of (97.0±1.0 %) of 4‐phenyl‐1,3‐dioxolan‐2‐one for styrene oxide at 100 °C and 0.1 MPa in 1.5 h. A simple and convenient method for catalytic reactions with amine‐terminated carbon dots was developed.

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“…Specifically, carbon dots and carbon nitrides [78,143–145] received the predominant attention, though materials such as graphene and fullerene were also shown to be effective photocatalysts [146,147] . Both, carbon dots and carbon nitrides can be easily synthesized from renewable biomass, which underlines their cost efficiency and sustainability [83,141,142,148–162] . Various carbon‐based structures with intrinsic photoinitiating properties were developed [34,35,41,83,130,138,141,142,146,147,163–172] .…”

Section: Photoinitiating Systemsmentioning

confidence: 99%

Light‐Mediated Polymerization Catalyzed by Carbon Nanomaterials

Luo,

Zhai,

Wang

et al. 2024

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Carbon nanomaterials, specifically carbon dots and carbon nitrides, play a crucial role as heterogeneous photoinitiators in both radical and cationic polymerization processes. These recently introduced materials offer promising solutions to the limitations of current homogeneous systems, presenting a novel approach to photopolymerization. This review highlights the preparation and photocatalytic performance of these nanomaterials, emphasizing their application in various polymerization techniques, including photoinduced i) free radical, ii) RAFT, iii) ATRP, and iv) cationic photopolymerization. Additionally, it discusses their potential in addressing contemporary challenges and explores prospects in this field. Moreover, carbon nitrides, in particular, exhibit exceptional oxygen tolerance, underscoring their significance in radical polymerization processes and allowing their applications such as 3D printing, surface modification of coatings, and hydrogel engineering.

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“…Besonders Kohlenstoffpunkte und Kohlenstoffnitride erhielten überwiegend Beachtung, [78,143–145] obwohl Materialien wie beispielsweise Graphen und Fulleren auch als effektive Photokatalysatoren beschrieben wurden [146,147] . Sowohl Kohlenstoffpunkte als auch Kohlenstoffnitride können leicht aus erneuerbarer Biomasse hergestellt werden, was ihre Kosteneffizienz und Nachhaltigkeit unterstreicht [83,141,142,148–162] . Verschiedene Kohlenstoff‐basierte Strukturen mit intrinsischen Photoinitiierungseigenschaften wurden entwickelt [34,35,41,83,130,138,141,142,146,147,163–172] .…”

Section: Photoinitiierende Systemeunclassified

Lichtinduzierte Polymerisation katalysiert durch Kohlenstoff‐Nanomaterialien

Luo,

Zhai,

Wang

et al. 2024

Angewandte Chemie

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Carbon nanomaterials, specifically carbon dots and carbon nitrides, play a crucial role as heterogeneous photoinitiators in both radical and cationic polymerization processes. These recently introduced materials offer promising solutions to the limitations of current homogeneous systems, presenting a novel approach to photopolymerization. This review highlights the preparation and photocatalytic performance of these nanomaterials, emphasizing their application in various polymerization techniques, including photoinduced i) free radical, ii) RAFT, iii) ATRP, and iv) cationic photopolymerization. Additionally, it discusses their potential in addressing contemporary challenges and explores prospects in this field. Moreover, carbon nitrides, in particular, exhibit exceptional oxygen tolerance, underscoring their significance in radical polymerization processes and allowing their applications such as 3D printing, surface modification of coatings, and hydrogel engineering.

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“All-in-One” Carbon Dot-Based Catalyst for Converting Co2 to Cyclic Carbonates

Cited by 5 publications

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Carbon Dots as New Effective Catalysts for Knoevenagel Condensation Reaction and Synthesis of Cyclic Carbonates under Solvent‐free Conditions

Carbon Dots as New Effective Catalysts for Knoevenagel Condensation Reaction and Synthesis of Cyclic Carbonates under Solvent‐free Conditions

Light‐Mediated Polymerization Catalyzed by Carbon Nanomaterials

Lichtinduzierte Polymerisation katalysiert durch Kohlenstoff‐Nanomaterialien

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