Investigation of Ce2(WO4)3/g-C3N4 nanocomposite for degradation of industrial pollutants through sunlight-driven photocatalysis

Ahilandeswari, G.; Arivuoli, D.

doi:10.1007/s00339-022-05846-w

Cited by 3 publications

(2 citation statements)

References 49 publications

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“…The peak located at 438 nm is as a result of greater photoelectron and hole recombination. CW2 and CW3 samples show lower intensity as g-C 3 N 4 hinders the recombination which will create more electrons and holes to take part in reducing the pollutant . The 489 nm emission corresponds to the emission from the 3 T 1 band to the 1 A 1 ground state of tungstate atoms …”

Section: Resultsmentioning

confidence: 99%

“…CW2 and CW3 samples show lower intensity as g-C 3 N 4 hinders the recombination which will create more electrons and holes to take part in reducing the pollutant. 20 The 489 nm emission corresponds to the emission from the 3 T 1 band to the 1 A 1 ground state of tungstate atoms. 25 The morphological analysis of the samples was investigated by using SEM.…”

Section: Resultsmentioning

confidence: 99%

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Investigation of g-C₃N₄/Ce₂(WO₄)₃ Nanocomposites for the Removal of Basic Dyes

Subramanian,

Rathinam,

Ganesan

et al. 2024

ACS Omega

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Herein, we have synthesized pristine and g-C 3 N 4assisted Ce 2 (WO 4 ) 3 via a facile hydrothermal method. The structure was confirmed with the standard JCPDS card. g-C 3 N 4 encapsulated the crystal and reduced the size. The Raman spectra revealed the presence of Ce−O, W−O stretching and bending vibrations. Electron hole transfer facilitation and controllable recombination were altered by g-C 3 N 4 heterojunction with cerium tungstate. Ce 2 (WO 4 ) 3 possessed a larger band gap. As g-C 3 N 4 was assisted, the band gap was reduced which facilitates Ce 2 (WO 4 ) 3 to utilize more visible light. The prepared photocatalysts were used to investigate the model pollutant removal with visible light. The pure Janus Green B sample showed lesser efficiency, as it does not show self-degradation under light. As Ce 2 (WO 4 ) 3 was added, it slightly improved the efficiency as it possesses lower electron hole transfer and high recombination. Thus, g-C 3 N 4 was composited with Ce 2 (WO 4 ) 3 to make heterojunctions which will enhance the photoexcited electron and hole transfer and decrease e − /h + recombination. The rate constant values of the photocatalysts were calculated, and the system follows the first-order pseudo-kinetic model. Ciprofloxacin, a well-known antibiotic, was also used to degrade under visible light. The pure sample showed lower efficiency, and the antibiotic was reduced well with the addition of prepared photocatalysts. The modification of Ce 2 (WO 4 ) 3 with the optimum-level g-C 3 N 4 facilitated electron hole charge transfer, and numerous adsorbed dye molecules on the photocatalyst surface made 0.1 g g-C 3 N 4 −Ce 2 (WO 4 ) 3 a plausible photocatalyst for the water remediation process.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Investigation of g-C₃N₄/Ce₂(WO₄)₃ Nanocomposites for the Removal of Basic Dyes

Subramanian,

Rathinam,

Ganesan

et al. 2024

ACS Omega

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High surface area g-C3N4 nanosheets as superior solar-light photocatalyst for the degradation of parabens

Stefa,

Zografaki,

Dimitropoulos

et al. 2023

Appl. Phys. A

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The rational design and development of highly-active photocatalytic materials for the degradation of dangerous chemical compounds, such as parabens, is one of the main research pillars in the field of photocatalysis. Graphitic carbon nitride (g-C3N4) is a 2D non-metal material and is considered one of the most promising photocatalysts, because of its peculiar physicochemical properties. In this work, porous g-C3N4 nanosheets (CNNs) were successfully prepared via thermal exfoliation of bulk g-C3N4 (CNB). A thorough physicochemical characterization analysis before and after the exfoliation process was performed, revealing the improved textural characteristics (surface area of 212 m2/g), chemical stability, and optical properties (wide band gap of 2.91 eV) of CNNs compared to the CNB. Then, both CNB and CNNs were comparatively assessed as photocatalysts for the degradation of methyl-, ethyl- and propylparaben (MP, EP, and PP), as well as of their mixture. CNNs with high surface area display superior photocatalytic performance under solar irradiation, offering > 95% degradation efficiency to all parabens, in contrast to the much inferior performance of CNB (< 30%). Several experimental parameters, involving catalyst concentration, initial concentration of parabens, and irradiation type were thoroughly investigated for the degradation of MP over CNNs. Moreover, various scavengers were employed to discriminate the role of different reactive species, revealing that superoxide anion radicals (·O2–) play a pivotal role in the degradation process, in contrast to hydroxyl radicals (·OH). The present results pave the way towards the facile synthesis of high surface area CNNs with improved textural and electronic characteristics, which can be applied in various environmental applications.

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Research Progress on Graphitic Carbon Nitride/Metal Oxide Composites: Synthesis and Photocatalytic Applications

Lin

Xiao

Geng

et al. 2022

IJMS

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Although graphitic carbon nitride (g-C3N4) has been reported for several decades, it is still an active material at the present time owing to its amazing properties exhibited in many applications, including photocatalysis. With the rapid development of characterization techniques, in-depth exploration has been conducted to reveal and utilize the natural properties of g-C3N4 through modifications. Among these, the assembly of g-C3N4 with metal oxides is an effective strategy which can not only improve electron–hole separation efficiency by forming a polymer–inorganic heterojunction, but also compensate for the redox capabilities of g-C3N4 owing to the varied oxidation states of metal ions, enhancing its photocatalytic performance. Herein, we summarized the research progress on the synthesis of g-C3N4 and its coupling with single- or multiple-metal oxides, and its photocatalytic applications in energy production and environmental protection, including the splitting of water to hydrogen, the reduction of CO2 to valuable fuels, the degradation of organic pollutants and the disinfection of bacteria. At the end, challenges and prospects in the synthesis and photocatalytic application of g-C3N4-based composites are proposed and an outlook is given.

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Investigation of Ce2(WO4)3/g-C3N4 nanocomposite for degradation of industrial pollutants through sunlight-driven photocatalysis

Cited by 3 publications

References 49 publications

Investigation of g-C₃N₄/Ce₂(WO₄)₃ Nanocomposites for the Removal of Basic Dyes

Investigation of g-C₃N₄/Ce₂(WO₄)₃ Nanocomposites for the Removal of Basic Dyes

High surface area g-C3N4 nanosheets as superior solar-light photocatalyst for the degradation of parabens

Research Progress on Graphitic Carbon Nitride/Metal Oxide Composites: Synthesis and Photocatalytic Applications

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Investigation of Ce2(WO4)3/g-C3N4 nanocomposite for degradation of industrial pollutants through sunlight-driven photocatalysis

Cited by 3 publications

References 49 publications

Investigation of g-C3N4/Ce2(WO4)3 Nanocomposites for the Removal of Basic Dyes

Investigation of g-C3N4/Ce2(WO4)3 Nanocomposites for the Removal of Basic Dyes

High surface area g-C3N4 nanosheets as superior solar-light photocatalyst for the degradation of parabens

Research Progress on Graphitic Carbon Nitride/Metal Oxide Composites: Synthesis and Photocatalytic Applications

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Investigation of g-C₃N₄/Ce₂(WO₄)₃ Nanocomposites for the Removal of Basic Dyes

Investigation of g-C₃N₄/Ce₂(WO₄)₃ Nanocomposites for the Removal of Basic Dyes