Facile synthesis of N-doped carbon dots/g-C3N4 photocatalyst with enhanced visible-light photocatalytic activity for the degradation of indomethacin

Wang, Fengliang; Chen, Ping; Xie, Zhijie; Liu, Yang; Su, Yuehan; Zhang, Qianxin; Wang, Yingfei; Yao, Kun; Lv, Wenying; Liu, Guoguang

doi:10.1016/j.apcatb.2017.02.024

Cited by 478 publications

(130 citation statements)

References 64 publications

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“…Generally, the PL quenching indicates the suppression of charge recombination and efficient photogenerated charge separation . This result suggests that the charge separation is the most efficient when NGQDs are incorporated into the crystalline g‐C 3 N 4 , possibly benefiting from the increased mobile electrons along the designed π–p–π network and the electron‐withdrawing ability of N atoms within the conjugated C plane …”

Section: Resultsmentioning

confidence: 97%

Chemical Interaction in Nitrogen‐Doped Graphene Quantum Dots/Graphitic Carbon Nitride Heterostructures with Enhanced Photocatalytic H₂ Evolution

Mou

Lü

et al. 2019

Energy Tech

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Strong electronic coupling between graphene quantum dots (GQDs) and graphitic carbon nitride (g‐C3N4) enables multiple charge transfer pathways, offers a new approach for light harvesting, and opens novel applications for carbon‐based materials. Herein, a nitrogen‐doped graphene quantum dots (NGQDs)/g‐C3N4 composite is designed by stitching NGQDs with g‐C3N4 through a thermal condensation approach, which conjugate via NGQDs‐lone pair electrons in a ternary N‐g‐C3N4 nanosheet (π–p–π) network. It is found that the H2 evolution rate under visible light (λ ≥ 420 nm) irradiation with NGQDs/g‐C3N4 is nearly 7.7, 7.2, and 2.5 times higher than that of pristine g‐C3N4, the mixture of NGQD and g‐C3N4, and a non‐nitrogen‐doped GQDs/g‐C3N4 composite, respectively. Due to better light harvesting in the NGQDs/g‐C3N4 composite, higher photocatalytic activities are also observed compared to others when they are illuminated by 520 and 550 nm light. It is demonstrated that the electronic coupling between NGQDs and g‐C3N4 generates new bands, driving the charge transfer along the π–p–π network and extending the visible light response range.

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Section: Resultsmentioning

confidence: 97%

Chemical Interaction in Nitrogen‐Doped Graphene Quantum Dots/Graphitic Carbon Nitride Heterostructures with Enhanced Photocatalytic H₂ Evolution

Mou

Lü

et al. 2019

Energy Tech

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“…Different strategies have been followed to incorporate the heteroatoms to the CDs in a single step including hydrothermal synthesis, pyrolysis method and microwave synthesis . These heteroatom‐doped CDs are potentially applied in many areas like bioimaging, sensing of metal ions and molecules as well as catalysis . Recently, iodide has been successfully detected in low levels using heteroatom carbon quantum dots by following the turn on–off sensing method .…”

Section: Introductionmentioning

confidence: 91%

Fabrication of nitrogen‐ and phosphorous‐doped carbon dots by the pyrolysis method for iodide and iron(III) sensing

et al. 2017

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A facile and novel strategy to synthesize nitrogen- and phosphorous-doped carbon dots (NPCDs) by single step pyrolysis method is described here. Citric acid is used as carbon source and di-ammonium hydrogen phosphate is used as both nitrogen and phosphorous sources, respectively. Through the extensive study on optical properties, morphology and chemical structures of the synthesized NPCDs, it is found that as-synthesized NPCDs exhibited good excitation-dependent luminescence property, spherical morphology and high stability. The obtained NPCDs are stable in aqueous medium and possess a quantum yield of 10.58%. In this work, a new assay method is developed to detect iodide ions using the synthesized NPCDs. Here, the inner filter effect is applied to detect the iodide ion and exhibited a wide linear response concentration range (10-60 μM) with a limit of detection (LOD) of 0.32 μM. Furthermore, the synthesized NPCDs are used for the selective detection of iron(III) (Fe ) ions and cell imaging. Fe ions sensing assay shows a detection range from 0.2 to 30 μM with a LOD of 72 nM. As an efficient photoluminescence sensor, the developed NPCDs have an excellent biocompatibility and low cytotoxicity, allowing Fe ion detection in HeLa cells.

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“…Recently,the coupling of g-C 3 N 4 with many metal-free carbonaceousm aterials, such as carbon dots [13] and graphene quan-tum dots (GQDs) [14] for efficient photocatalysis, has attracted more attention. GQDs consist of one or af ew layers of graphene with small size (< 10 nm), and their laterald imensions are also obviously larger than their height.…”

Section: Introductionmentioning

confidence: 99%

Graphene Quantum‐Dot‐Modified Hexagonal Tubular Carbon Nitride for Visible‐Light Photocatalytic Hydrogen Evolution

et al. 2018

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Graphene quantum dots were modified on hexagonal tubular carbon nitride to form a composite photocatalyst by freeze‐drying technology. With an optimum loading amount of 0.15 wt % GQDs, the composite photocatalyst exhibits an improved visible‐light photocatalytic performance for hydrogen evolution (112.1 μmol h−1) that is about 9 times higher than that of bulk carbon nitride. During the photocatalytic reaction, graphene quantum dots play a photosensitizer role and an electron reservoir, which can extend the visible‐light response of the photocatalyst, decrease its band gap, and improve the separation efficiency of photoinduced electron–hole pairs. The graphene quantum dots can also absorb the long‐wavelength light and then emit the shorter wavelength light based on its upper transfer luminescence properties, which also contribute to the utilization of visible light. This finding demonstrates that the graphene quantum‐dot modification is a promising method to improve visible‐light photocatalytic activities for traditional photocatalysts.

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Facile synthesis of N-doped carbon dots/g-C3N4 photocatalyst with enhanced visible-light photocatalytic activity for the degradation of indomethacin

Cited by 478 publications

References 64 publications

Chemical Interaction in Nitrogen‐Doped Graphene Quantum Dots/Graphitic Carbon Nitride Heterostructures with Enhanced Photocatalytic H₂ Evolution

Chemical Interaction in Nitrogen‐Doped Graphene Quantum Dots/Graphitic Carbon Nitride Heterostructures with Enhanced Photocatalytic H₂ Evolution

Fabrication of nitrogen‐ and phosphorous‐doped carbon dots by the pyrolysis method for iodide and iron(III) sensing

Graphene Quantum‐Dot‐Modified Hexagonal Tubular Carbon Nitride for Visible‐Light Photocatalytic Hydrogen Evolution

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Facile synthesis of N-doped carbon dots/g-C3N4 photocatalyst with enhanced visible-light photocatalytic activity for the degradation of indomethacin

Cited by 478 publications

References 64 publications

Chemical Interaction in Nitrogen‐Doped Graphene Quantum Dots/Graphitic Carbon Nitride Heterostructures with Enhanced Photocatalytic H2 Evolution

Chemical Interaction in Nitrogen‐Doped Graphene Quantum Dots/Graphitic Carbon Nitride Heterostructures with Enhanced Photocatalytic H2 Evolution

Fabrication of nitrogen‐ and phosphorous‐doped carbon dots by the pyrolysis method for iodide and iron(III) sensing

Graphene Quantum‐Dot‐Modified Hexagonal Tubular Carbon Nitride for Visible‐Light Photocatalytic Hydrogen Evolution

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Product

Resources

About

Chemical Interaction in Nitrogen‐Doped Graphene Quantum Dots/Graphitic Carbon Nitride Heterostructures with Enhanced Photocatalytic H₂ Evolution

Chemical Interaction in Nitrogen‐Doped Graphene Quantum Dots/Graphitic Carbon Nitride Heterostructures with Enhanced Photocatalytic H₂ Evolution