Carbon quantum dots-modified reduced ultrathin g-C3N4 with strong photoredox capacity for broad spectrum-driven PPCPs remediation in natural water matrices

Jin, Xiaoyu; Wu, Yuliang; Wang, Yingfei; Lin, Zili; Liang, Danluo; Zheng, Xiaoshan; Wei, Dandan; Liu, Haijin; Lv, Wenying; Liu, Guoguang

doi:10.1016/j.cej.2021.129935

Cited by 37 publications

(25 citation statements)

References 54 publications

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“…30,37 The high-resolution N 1s spectrum (Figure 1d) exhibited two dominant peaks with binding energies at 399.8 and 401.4 eV ascribed to pyrrolic N and amino N, respectively. 38,39 The O 1s spectrum (Figure 1e) demonstrated two apparent peaks centered at 531.4 and 532.9 eV, which were related to C O. 40,41 The surface components of the PCNDs-2 from XPS characterization were in good agreement with that of FT-IR analysis, which all suggested multiple oxygenated and nitrous groups on the surface of as-prepared PCNDs-2.…”

Section: Synthesis Of Polymer Carbon Nanodots (Pcnds)supporting

confidence: 61%

Polymer Carbon Nanodots: A Novel Electrochemiluminophore for Dual Mode Detection of Ferric Ions

et al. 2022

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The development of simple and effective dual-mode analytical methods plays crucial regulatory roles in the discrimination of relevant target species, because of their built-in cross reference correction and high accuracy. In this work, a novel polymer carbon nanodots (PCNDs) prepared from a facile one-pot hydrothermal procedure using readily available L-tryptophan and L-phenylalanine as precursors, showed excellent aqueous solubility and blue fluorescence property with a high quantum yield of 29%. Moreover, the PCNDs was demonstrated to be a robust luminophore with electrochemiluminescence (ECL) efficiency of 43% was achieved by using K 2 S 2 O 8 as a coreactant. The spooling ECL spectroscopy was employed to take insight into excited states responsible for the potential-dependent ECL emissions. Most importantly, when introduced into construction of the fluorescence and ECL dual mode sensing platform, for the first time, the PCNDs displayed prominent performance for the detection of ferric ions (Fe 3+ ). The ferric ions could be quantified ranging from micromolar to millimolar with a detection limit of 0.22 and 5.3 μM, respectively. Such a dual-functional sensing platform also exhibits excellent selectivity, reproducibility and stability. Results from this work indicate that PCNDs showing great promise as a bright luminophore for the fabrication of low-cost, high-performance dual-signal readout platforms for ferric ions determination.

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Section: Synthesis Of Polymer Carbon Nanodots (Pcnds)supporting

confidence: 61%

Polymer Carbon Nanodots: A Novel Electrochemiluminophore for Dual Mode Detection of Ferric Ions

et al. 2022

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“…263 To further improve the photocatalytic performance of the heterostructures, C QDs were doped with N and/or S elements for better light absorption and charge separation (Figure 15D,E). 264,265 On the other hand, other emerging methods such as thermal pyrolysis, [266][267][268] electrostatic attraction, 269 and the deposition method in photocatalytic advancement when coupling with 2D g-C 3 N 4 , by viewing at the as-discussed benefits. However, a few studies proposed ternary heterostructure synergy to further boost the photocatalytic behavior, thus yielding metal-free-based photocatalysts for large-scale energy generation.…”

Section: Metal Phosphides/g-c 3 Nmentioning

confidence: 99%

“…To further improve the photocatalytic performance of the heterostructures, C QDs were doped with N and/or S elements for better light absorption and charge separation (Figure 15D,E). 264,265 On the other hand, other emerging methods such as thermal pyrolysis, 266–268 electrostatic attraction, 269 and the deposition method 270 have been developed to load 0D C NPs on g‐C 3 N 4 nanosheets. As such, 0D C dots played pre‐eminent role in photocatalytic advancement when coupling with 2D g‐C 3 N 4 , by viewing at the as‐discussed benefits.…”

Section: Interfacial Engineering Of 0d/2d G‐c3n4‐based Systemsmentioning

confidence: 99%

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Point‐to‐face contact heterojunctions: Interfacial design of 0D nanomaterials on 2D g‐C₃N₄ towards photocatalytic energy applications

Tan

Mohamed

et al. 2022

Carbon Energy

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Green energy generation is an indispensable task to concurrently resolve fossil fuel depletion and environmental issues to align with the global goals of achieving carbon neutrality. Photocatalysis, a process that transforms solar energy into clean fuels through a photocatalyst, represents a felicitous direction toward sustainability. Eco-rich metal-free graphitic carbon nitride (g-C 3 N 4 ) is profiled as an attractive photocatalyst due to its fascinating properties, including excellent chemical and thermal stability, moderate band gap, visible light-active nature, and ease of fabrication. Nonetheless, the shortcomings of g-C 3 N 4 include fast charge recombination and limited surface-active sites, which adversely affect photocatalytic reactions. Among the modification strategies, point-to-face contact engineering of 2D g-C 3 N 4 with 0D nanomaterials represents an innovative and promising synergy owing to several intriguing attributes such as the high specific surface area, short effective charge-transfer pathways, and quantum confinement effects. This review introduces recent advances achieved in experimental and computational studies on the interfacial design of 0D nanostructures on 2D g-C 3 N 4 in the construction of point-to-face heterojunction interfaces. Notably, 0D materials such as metals, metal oxides, metal sulfides, metal selenides, metal phosphides, and nonmetals on g-C 3 N 4 with different charge-transfer mechanisms are systematically discussed along with controllable synthesis strategies. The applications of 0D/2D g-C 3 N 4 -based photocatalysts are focused on

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“…Nevertheless, its practical application is still limited by the low light absorption coefficient, poor porosity, and low-charge carrier mobility. Different strategies have been investigated to improve the chemical and texture properties, as well as the charge separation of g-C 3 N 4 , namely, using different precursors [ 10 ], synthesis, and post-treatment techniques [ 11 , 12 ], doping with metals and non-metals [ 13 , 14 ], in combination with carbon materials [ 15 , 16 , 17 , 18 ] and semiconductor heterojunction [ 19 , 20 ], among others.…”

Section: Introductionmentioning

confidence: 99%

One-Pot Thermal Synthesis of g-C3N4/ZnO Composites for the Degradation of 5-Fluoruracil Cytostatic Drug under UV-LED Irradiation

et al. 2022

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Graphitic carbon nitride (g-C3N4) was used to enhance the photocatalytic activity of ZnO nanoparticles for the degradation of 5-fluorouracil (5-FU) cytostatic drug under UV-LED irradiation. CN/ZnO composites were synthetized by an easy one-pot thermal method, varying the g-C3N4 loading, i.e., from 10 to 67 wt% and a post-thermal exfoliation in air. The physicochemical and optical properties of the materials were analyzed by several techniques. CN/ZnO composites showed a coral-like structure of spherical ZnO wurtzite particles on the g-C3N4 structure. In general, the synergism and heterojunction interface between both phases allowed the enhancement of the mesoporosity, light absorption ability, and the aromaticity of the corresponding composites. Moreover, the photocatalytic activity of the CN/ZnO composites was increased with the addition of g-C3N4 in comparison with pristine ZnO. The highest activity was found for the composite containing 25 wt% of g-C3N4 (i.e., CN25/ZnO), reaching the total degradation of 5-FU and a mineralization of 48% at 180 min, as well as a good photostability during four reuse cycles. Experiments with different pH solutions and scavengers allowed for the assessment of the reactive oxygen species (ROS) involved in the 5-FU degradation pathway, with radicals and non-radical species as the main responsible active species. Furthermore, a tentative photocatalytic mechanism was proposed for CN/ZnO composites.

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Carbon quantum dots-modified reduced ultrathin g-C3N4 with strong photoredox capacity for broad spectrum-driven PPCPs remediation in natural water matrices

Cited by 37 publications

References 54 publications

Polymer Carbon Nanodots: A Novel Electrochemiluminophore for Dual Mode Detection of Ferric Ions

Polymer Carbon Nanodots: A Novel Electrochemiluminophore for Dual Mode Detection of Ferric Ions

Point‐to‐face contact heterojunctions: Interfacial design of 0D nanomaterials on 2D g‐C₃N₄ towards photocatalytic energy applications

One-Pot Thermal Synthesis of g-C3N4/ZnO Composites for the Degradation of 5-Fluoruracil Cytostatic Drug under UV-LED Irradiation

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Carbon quantum dots-modified reduced ultrathin g-C3N4 with strong photoredox capacity for broad spectrum-driven PPCPs remediation in natural water matrices

Cited by 37 publications

References 54 publications

Polymer Carbon Nanodots: A Novel Electrochemiluminophore for Dual Mode Detection of Ferric Ions

Polymer Carbon Nanodots: A Novel Electrochemiluminophore for Dual Mode Detection of Ferric Ions

Point‐to‐face contact heterojunctions: Interfacial design of 0D nanomaterials on 2D g‐C3N4 towards photocatalytic energy applications

One-Pot Thermal Synthesis of g-C3N4/ZnO Composites for the Degradation of 5-Fluoruracil Cytostatic Drug under UV-LED Irradiation

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Point‐to‐face contact heterojunctions: Interfacial design of 0D nanomaterials on 2D g‐C₃N₄ towards photocatalytic energy applications