Tailoring photoactivity of polymeric carbon nitride via donor-π-acceptor network

Bhoyar, Toshali; Kim, Dong Jin; Abraham, B. M.; Tonda, Surendar; Manwar, Nilesh R.; Vidyasagar, Devthade; Umare, Suresh S.

doi:10.1016/j.apcatb.2022.121347

Cited by 58 publications

(25 citation statements)

References 42 publications

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“…PCN was synthesized by a one-step calcination approach as per our previous report. 19 Briefly, 10 g of urea was placed in an alumina crucible, and 1 g of melamine was applied on the top in the form of a thin layer, followed by 2 h of heating at 550 °C in an air environment with a lid. The melamine layer acts as a shield to prevent the rapid evaporation of urea in the air and achieve a high PCN yield.…”

Section: ■ Materials and Methodsmentioning

confidence: 99%

“…Inspired by their efforts, we endeavor to couple N- g -CDs with visible-light-active PCN. Bulk PCN as a photocatalyst has inherent shortfalls such as limited light absorption (λ > 450 nm), ultrafast photo-exciton recombination, surface inertness, and sluggish reaction kinetics. , Despite this, the day-to-day overall photocatalytic activity of PCN material is witnessing a significant improvement. − A common strategy for improving the PCN performance is coupling it with metal oxide or sulfide semiconductors, which are complex and unreliable. In view of the low-cost and sustainable materials design, construction of a benign metal-free PCN-based photocatalyst is preferable.…”

Section: Introductionmentioning

confidence: 99%

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Nitrogen-Doped Graphitic Carbon Dots Embedded in Carbon Nitride Scaffolds for Water Decontamination

Bhoyar

Saraswat

Jyothirmai

et al. 2023

ACS Appl. Nano Mater.

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Functionalized carbon dots (CDs) exhibit intriguing photo-exciton dynamics. CDs can donate or accept electrons depending on their functional groups and electrostatic characteristics. We exploited the electron-accepting capability of nitrogendoped graphitic carbon dots (N-g-CDs) to improve the chargecarrier separation of the polymeric carbon nitride (PCN) photocatalyst. L-Aspartic acid pyrolyzed at 320 °C yielded ∼25 nm size N-g-CDs that were embedded with PCN. The in-plane infiltration of nanosized N-g-CDs increased the surface area of PCN from 11.5 to 104.9 m 2 g −1 . The N-g-CDs/PCN hybrid catalyst tested for photocatalytic chromium reduction evidenced about a 3-fold higher rate than PCN. Also, the antibiotic tetracycline and rhodamine B dye rapidly degraded with faster degradation kinetics. The carrier dynamic analysis and computational investigations suggest that the electron acceptor feature of N-g-CDs governs the effective separation of photo-excitons and the high surface area of N-g-CDs/PCN contributes to photoactivity enhancement. This study offers insights into designing high-performance metal-free photocatalysts for water treatment applications.

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Section: ■ Materials and Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Nitrogen-Doped Graphitic Carbon Dots Embedded in Carbon Nitride Scaffolds for Water Decontamination

Bhoyar

Saraswat

Jyothirmai

et al. 2023

ACS Appl. Nano Mater.

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“…The photocatalytic H 2 evolution study was performed according to our previous report. 15 In a typical process, 4 mg of catalyst was added to 40 mL of deionized water and ultrasonicated for 10 mins. Afterward, 10 vol% TEOA was added to the mixture and the reaction mixture was purged with Ar for 20 mins to remove air.…”

Section: Methodsmentioning

confidence: 99%

“… 14 For instance, surface engineering of π-conjugative carbon nitride framework with additional organic molecules dramatically alters its optoelectronic properties. 15 , 16 As a result, a new electronic configuration is imparted within the band gap known as the mid-gap/defect state. 17 These intrinsic trap states can potentially reduce radiative charge carrier recombination and thus extend the overall visible light absorption range.…”

Section: Introductionmentioning

confidence: 99%

Accelerating NADH oxidation and hydrogen production with mid-gap states of nitrogen-rich carbon nitride photocatalyst

Bhoyar¹,

Kim²,

Abraham³

et al. 2022

iScience

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“…The copolymerization approach allows the integration of structure-matching aromatic groups or organic additives into the g−CN framework to adjust its intrinsic properties [ 126 , 127 , 128 ]. It was found that molecular doping can modulate the conventional π systems, band structure, electronic properties, optical absorption, and, importantly, PEC performance [ 129 ]. Bian et al [ 53 ] copolymerized melamine and 2,6−diaminopyridine (26D) to synthesize g−CN film by the TVC method.…”

Section: Functionalization Of G−cn Photoelectrodementioning

confidence: 99%

Recent Progress on Photoelectrochemical Water Splitting of Graphitic Carbon Nitride (g−CN) Electrodes

Zhu

et al. 2022

Nanomaterials

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Graphitic carbon nitride (g−CN), a promising visible-light-responsive semiconductor material, is regarded as a fascinating photocatalyst and heterogeneous catalyst for various reactions due to its non-toxicity, high thermal durability and chemical durability, and “earth-abundant” nature. However, practical applications of g−CN in photoelectrochemical (PEC) and photoelectronic devices are still in the early stages of development due to the difficulties in fabricating high-quality g−CN layers on substrates, wide band gaps, high charge-recombination rates, and low electronic conductivity. Various fabrication and modification strategies of g−CN-based films have been reported. This review summarizes the latest progress related to the growth and modification of high-quality g−CN-based films. Furthermore, (1) the classification of synthetic pathways for the preparation of g−CN films, (2) functionalization of g−CN films at an atomic level (elemental doping) and molecular level (copolymerization), (3) modification of g−CN films with a co-catalyst, and (4) composite films fabricating, will be discussed in detail. Last but not least, this review will conclude with a summary and some invigorating viewpoints on the key challenges and future developments.

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Tailoring photoactivity of polymeric carbon nitride via donor-π-acceptor network

Cited by 58 publications

References 42 publications

Nitrogen-Doped Graphitic Carbon Dots Embedded in Carbon Nitride Scaffolds for Water Decontamination

Nitrogen-Doped Graphitic Carbon Dots Embedded in Carbon Nitride Scaffolds for Water Decontamination

Accelerating NADH oxidation and hydrogen production with mid-gap states of nitrogen-rich carbon nitride photocatalyst

Recent Progress on Photoelectrochemical Water Splitting of Graphitic Carbon Nitride (g−CN) Electrodes

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