Two-dimensional/two-dimensional Z-scheme photocatalyst of graphitic carbon nitride/bismuth vanadate for visible-light-driven photocatalytic synthesis of imines

Liu, Ying; Yuan, Aili; Xiao, Yufei; Yu, Huijia; Dong, Xiaoping

doi:10.1016/j.ceramint.2020.03.171

Cited by 56 publications

(11 citation statements)

References 59 publications

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“…n is determined by the optical transition type of the semiconductor ( n = 1 for direct band gap semiconductors and n = 4 for indirect band gap semiconductors). BiVO 4 and g‐C 3 N 4 are direct and indirect band gap semiconductors (Liu et al, 2020; Zhong et al, 2019), respectively. Therefore, as shown in the graphs of band gap energy in Figure 5b,c, the band gap energies of g‐C 3 N 4 and BiVO 4 are estimated to be 2.65 eV and 2.40 eV, respectively.…”

Section: Resultsmentioning

confidence: 99%

Enhanced photocatalytic degradation activity of Z‐scheme heterojunction BiVO₄/Cu/g‐C₃N₄ under visible light irradiation

et al. 2021

Water Environment Research

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A novel BiVO4/Cu/g‐C3N4 heterostructure photocatalyst was synthesized by thermal condensation, hydrothermal, and in situ precipitation method. The microscopic morphology and chemical composition of the synthesized samples were analyzed by XRD, SEM, FT‐IR, XPS, and other characterizations. BiVO4/Cu/g‐C3N4 (BiVO4/Cu:g‐C3N4 mass ratio was 1:1) photocatalyst had the optimal photocatalytic degradation activity for tetracycline (TC) wastewater under visible light irradiation (120 min, 74.8%). The introduction of Cu and Z‐scheme heterojunction was further confirmed by UV‐vis, PL, EIS, and capture mechanism analysis, which effectively accelerated the separation and transfer rate of photogenerated electron holes and enhanced the strong oxidation of h+ and •O2− active species. BiVO4/Cu/g‐C3N4 heterojunction photocatalytic material has potential application value in the removal of refractory pollutants in wastewater. Practitioner points A novel Z‐scheme BiVO4/Cu/g‐C3N4 photocatalyst with excellent photocatalytic activities and stability was prepared to treat tetracycline (TC) wastewater. 1:1 CBCN (BiVO4/Cu:g‐C3N4 mass ratio was 1:1) photocatalyst exhibited the highest photocatalytic performance for TC wastewater. The Z‐scheme heterojunction and Cu act as the interfacial charge transfer medium accelerated the transfer and separation of carriers.

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Section: Resultsmentioning

confidence: 99%

Enhanced photocatalytic degradation activity of Z‐scheme heterojunction BiVO₄/Cu/g‐C₃N₄ under visible light irradiation

et al. 2021

Water Environment Research

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“…In order to demonstrate the enhanced photoelectric performance after the addition of FePc into CN skeleton, the transient photocurrent response and EIS were measured. As presented in Figure 8a, the gCN-FePc-1 exhibited much higher photocurrent intensity than the gCN, indicating that much more photoexcited electron-hole pairs were generated and separated in the gCN-FePc-1 [24,59]. The EIS spectrum in Figure 8b shows that the gCN-FePc-1 possessed a smaller arc radius than gCN, representing a lower resistance and a higher charge transfer ability in the gCN-FePc-1 than the gCN [19,60].…”

Section: Plausible Photocatalytic Mechanismmentioning

confidence: 96%

Covalent Modification of Iron Phthalocyanine into Skeleton of Graphitic Carbon Nitride and Its Visible-Light-Driven Photocatalytic Reduction of Nitroaromatic Compounds

et al. 2022

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It is of great urgency to eliminate nitroaromatic compounds (NACs) in wastewater due to their high residue and toxicity. Photocatalysis reduction is considered to be an efficient technology for converting NACs to their corresponding aromatic amines. In this work, a visible-light-driven hybrid photocatalyst was synthesized by covalently doping Fe phthalocyanine (FePc) into graphitic carbon nitride skeleton. Compared to the pristine gCN, the optimized gCN-FePc-1 photocatalyst showed enhanced absorption in visible light region, which promoted photogenerated charge transfer and separation. Using p-nitrophenol (p-NP) as the model pollutant, the CN-FePc-1 effectively reduced it to p-aminophenol (p-AP), with the photocatalytic reaction rate being 18 and 3 times higher, respectively, than those of the pristine gCN and the mechanically mixed photocatalyst of gCN/FePc. Moreover, excellent photocatalytic universality for other NACs, high stability, and good reusability also were confirmed. Based on the band structure of the gCN-FePc-1 photocatalyst, a plausible mechanism was proposed to illustrate the photocatalytic reduction process of p-NP to p-AP. This study demonstrates that the covalent modification of FePc into gCN skeleton is an effective strategy to modulate the electronic structure, and the hybrid gCN-FePc is a potential visible-light-driven photocatalyst that potentially can be used for eliminating NAC contamination in wastewater.

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“…g-C 3 N 4 has prominent features namely attractive electronic structure (band gap 2.7 eV), great thermal stability, and surface area, easy accessibility via facile synthesis methods such as thermal decomposition of earth-abundant, low cost, and nitrogen rich raw materials e.g. cyanamide, dicyandiamide, melamine, thiourea and urea (Liu et al 2020; Majumdar and Pal 2020; Ong et al 2016). Urea is a suitable precursor to fabricate the g-C 3 N 4 with high porosity and great surface area (Ong et al 2016;Zhang et al 2012).…”

Section: Introductionmentioning

confidence: 99%

Laser-assisted preparation of C3N4/Fe2O3/Au nanocomposite: a magnetic reusable catalyst for pollutant degradation

Nasri

Nezafat

Jaleh

et al. 2021

Clean Techn Environ Policy

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Assorted common contaminants namely organic dyes and nitro compounds are generated by various industries and have caused alarming problems for the environment and humans. The development of effective and newer methods to eliminate these contaminants is imperative. One effective way to eliminate these pollutants is to deploy sustainable heterogeneous catalyst systems. Accordingly, a novel and e cient magnetic nanocomposite catalyst comprising graphitic carbon nitride (g-C 3 N 4 ), gold (Au), and hematite (α-Fe 2 O 3 ) nanoparticles (C 3 N 4 /Fe 2 O 3 /Au) is prepared through a cost-effective and green method. The individual components, g-C 3 N 4 and Au nanoparticles (NPs), are prepared via thermal decomposition of urea and laser ablation in liquid (LAL), respectively. The behavior of C 3 N 4 /Fe 2 O 3 /Au nanocomposite as a catalyst for the borohydride reduction of methyl orange (MO) dye and 4-nitrophenol (4-NP) in aqueous solution is illustrated.

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Two-dimensional/two-dimensional Z-scheme photocatalyst of graphitic carbon nitride/bismuth vanadate for visible-light-driven photocatalytic synthesis of imines

Cited by 56 publications

References 59 publications

Enhanced photocatalytic degradation activity of Z‐scheme heterojunction BiVO₄/Cu/g‐C₃N₄ under visible light irradiation

Enhanced photocatalytic degradation activity of Z‐scheme heterojunction BiVO₄/Cu/g‐C₃N₄ under visible light irradiation

Covalent Modification of Iron Phthalocyanine into Skeleton of Graphitic Carbon Nitride and Its Visible-Light-Driven Photocatalytic Reduction of Nitroaromatic Compounds

Laser-assisted preparation of C3N4/Fe2O3/Au nanocomposite: a magnetic reusable catalyst for pollutant degradation

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Two-dimensional/two-dimensional Z-scheme photocatalyst of graphitic carbon nitride/bismuth vanadate for visible-light-driven photocatalytic synthesis of imines

Cited by 56 publications

References 59 publications

Enhanced photocatalytic degradation activity of Z‐scheme heterojunction BiVO4/Cu/g‐C3N4 under visible light irradiation

Enhanced photocatalytic degradation activity of Z‐scheme heterojunction BiVO4/Cu/g‐C3N4 under visible light irradiation

Covalent Modification of Iron Phthalocyanine into Skeleton of Graphitic Carbon Nitride and Its Visible-Light-Driven Photocatalytic Reduction of Nitroaromatic Compounds

Laser-assisted preparation of C3N4/Fe2O3/Au nanocomposite: a magnetic reusable catalyst for pollutant degradation

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Enhanced photocatalytic degradation activity of Z‐scheme heterojunction BiVO₄/Cu/g‐C₃N₄ under visible light irradiation

Enhanced photocatalytic degradation activity of Z‐scheme heterojunction BiVO₄/Cu/g‐C₃N₄ under visible light irradiation