Facile synthesis of porous g-C3N4/β-SiAlON material with visible light photocatalytic activity

Akulinkin, A. A.; Болгару, К. А.; Reger, Anton

doi:10.1016/j.matlet.2021.130788

Cited by 20 publications

(3 citation statements)

References 29 publications

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“…Ряд нитридных мате риалов обладает уникальными физикохимичес кими свойствами [7 -9]. Они могут быть использованы в производстве компонентов газотурбин [10], теплоотводных радиаторов [11], режущих инструментов [12; 13], фотокатализаторов [14], полупроводников [15] и т. д.…”

Section: Introductionunclassified

Physical and chemical processes during nitriding of chromium ferrosilicon by filtration combustion

Bolgaru,

Reger,

Vereshchagin

et al. 2024

Izv. vysš. učebn. zaved., Čern. metall.

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In this paper, the nitriding of chromium ferrosilicon is carried out in the combustion mode under the condition of natural nitrogen filtration. The authors studied the effect of the key parameters (pressure of gaseous nitrogen, diameter and dispersity of starting samples) on the maximum temperature and combustion of the starting powder mixture based on chromium ferrosilicon. The combustion synthesis of chromium ferrosilicon proceeds steadily in the stationary mode with formation of a macrohomogeneous nitrided composition which, according to the results of X-ray phase analysis, contains two nitride phases - chromium nitride and silicon nitride. Interaction of the initial powder with gaseous nitrogen in the filtration combustion mode proceeds by the following probable chemical reaction: 3CrSi2 + 3Si + 3FeSi2 + 11.5N2 = 3CrN + 5Si3N4 + 3Fe. Increasing the diameter of the starting samples slightly affects the amount of absorbed nitrogen and slows the propagation of the combustion wave front. An increase in the pressure of gaseous nitrogen increases the amount of absorbed nitrogen and the combustion rate. Increasing the dispersity of the starting powder increases the amount of absorbed nitrogen and the combustion rate. It was found that the combustion reaction is not possible with a dense initial sample. The maximum combustion temperature, depending on the nitriding conditions, varies between 2400 and 2650 °C and increases with increasing gaseous nitrogen pressure, diameter of the initial samples and dispersion of chromium ferrosilicon powder. It is possible to realise nitriding of chrome ferrosilicon in the combustion mode at the pressure of gaseous nitrogen not less than 3 MPa, diameter of initial samples not less than 3.5 cm and size of initial particles not more than 100 μm. Optimal parameters of nitriding are gaseous nitrogen pressure of 5 MPa, diameter of samples 5 cm, size of initial particles less than 100 μm and bulk density of samples (2.23 g/cm3).

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Section: Introductionunclassified

Physical and chemical processes during nitriding of chromium ferrosilicon by filtration combustion

Bolgaru,

Reger,

Vereshchagin

et al. 2024

Izv. vysš. učebn. zaved., Čern. metall.

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“…As a narrowband semiconductor with a multilayered structure similar to graphene, g-C 3 N 4 is currently an emerging material in the field of photocatalysis [ 17 ]. Its response to visible light, a band gap of approximately 2.7 eV, high chemical stability, and unique electronic properties make g-C 3 N 4 an excellent nonmetallic photocatalyst [ 18 , 19 ].…”

Section: Introductionmentioning

confidence: 99%

A Novel Photocatalytic Functional Coating Applied to the Degradation of Xylene in Coating Solvents under Solar Irradiation

Sun

Tan

et al. 2023

Nanomaterials

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A novel photocatalytic functional coating was prepared with g-C3N4/TiO2 composites as the photocatalytic active component modified by dielectric barrier discharge (DBD), and it showed an efficient catalytic performance under solar light irradiation. The degradation of xylene released from fluorocarbon coating solvents by the g-C3N4/TiO2 composite coatings was investigated under simulated solar irradiation. The degradation efficiency of the coating mixed with DBD-modified 10%-g-C3N4/TiO2 showed a stable, long-lasting, and significantly higher activity compared to the coatings mixed with the unmodified catalyst. Ninety-eight percent of the xylene released from fluorocarbon coating solvents was successfully removed under solar light irradiation in 2 h. The properties of the catalyst samples before and after modification were evaluated using scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FT-IR), ultraviolet–visible (UV–vis) spectroscopy, X-ray photoelectron spectroscopy (XPS), and other characterization techniques. The results suggested that DBD-modified g-C3N4/TiO2 showed an improved capture ability and utilization efficiency of solar light with reduced band gap and lower complexation rate of electron–hole pairs. The prepared photocatalytic coating offers an environmentally friendly approach to purify the volatile organic compounds (VOCs) released from solvent-based coatings.

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“…Other photocatalysts, like Cu 2 − x Se (Liu et al, 2019), ZnIn 2 S 4 (Mao et al, 2021), also have been widely researched, whereas their slow photo-generate charges-holes separation rate still hinder their further development. Graphitic carbon nitride (g-C 3 N 4 ), a metal-free photocatalyst, has been intensively studied in water splitting (Cheng et al, 2018), water puri cation (Akulinkin et al, 2021;Yan et al, 2009), since it was rst reported in 2009. g-C 3 N 4 is composed by sp 2 -hybridized C and N forms a π-conjugated system, favoring the adjustment of nanosheet-based materials in electronics and optoelectronics (Cui et al, 2011;Yang et al, 2015). Additionally, g-C 3 N 4 presents suitable energy gap of 2.7 eV, indicating it can absorb and utilize visible light with wavelengths < 470 nm (Li et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Potassium-doped g-C3N4 enables efficient visible-light-driven dye degradation

Yuan¹,

Liu²,

Zhang

2023

Environ Sci Pollut Res

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Elements doping is recognized as an e cient method to boost the photocatalytic performance of photocatalysts. Here, a new potassium ion-doped precursor, potassium sorbate, was employed in melamine con guration during calcination process to prepare the potassium doped g-C 3 N 4 (KCN). By various characterization techniques and electrochemical measurements, the doping of K in g-C 3 N 4 can e ciently modify the band structure to enhance the light absorption, greatly increase the conductivity to accelerate charge transfer and photo-generated carriers separation, ultimately achieving an excellent photodegradation of the organic pollutant (methylene blue, MB). These results have demonstrated that the approach of potassium incorporation in g-C 3 N 4 has potential in fabricating high-performance photocatalysts for organic pollutants removal. Highlights 1. K incorporated g-C 3 N 4 was successfully fabricated with a new precursor.2. KCN exhibited improved conductivity and photo-generated carriers separation.3. KCN showed an improved photocatalytic activity in degrading MB.

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Facile synthesis of porous g-C3N4/β-SiAlON material with visible light photocatalytic activity

Cited by 20 publications

References 29 publications

Physical and chemical processes during nitriding of chromium ferrosilicon by filtration combustion

Physical and chemical processes during nitriding of chromium ferrosilicon by filtration combustion

A Novel Photocatalytic Functional Coating Applied to the Degradation of Xylene in Coating Solvents under Solar Irradiation

Potassium-doped g-C3N4 enables efficient visible-light-driven dye degradation

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