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Visible light-induced photocatalysis–self-Fenton degradation of P-Clphoh over graphitic carbon nitride by a polyethylenimine bifunctional catalyst

05.29.24 | Beijing Zhongke Journal Publising Co. Ltd.

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The Performance of the 5% Fe-4PEI-CN Photocatalyst in Degrading p-Chlorophenol (p-ClPhOH) and Generating Hydrogen Peroxide (H2O2)
Through a series of photocatalytic experiments, we found that the 5% Fe-4PEI-CN catalyst significantly enhances the degradation efficiency of p-chlorophenol (p-ClPhOH) under visible light irradiation. The experimental results show that the modified 5% Fe-4PEI-CN exhibits much higher photocatalytic activity compared to pristine carbon nitride (CN). Under visible light, 5% Fe-4PEI-CN rapidly degrades p-ClPhOH, with a degradation efficiency markedly superior to both unmodified CN and CN modified wi Credit: Beijing Zhongke Journal Publising Co. Ltd.

The deep degradation of organic pollutants through solar light-coupled photocatalysis and the Fenton reaction (Photo-Fenton) holds significant importance in the field of water purification. In this study, a novel bifunctional catalyst (Fe-PEI-CN) was synthesized by electrostatic self-assembly and hydrothermal methods, doping graphene-like carbon nitride (CN) with polyethyleneimine (PEI) and iron (Fe) species. This catalyst efficiently degraded p-chlorophenol (p-ClPhOH) by generating hydrogen peroxide (H 2 O 2 ) during the photocatalytic process. The relationship between catalytic efficiency and structure was explored using various characterization techniques.Under visible light irradiation, the prepared Fe-PEI-CN firstly generated H 2 O 2 via photocatalysis and subsequently degraded the produced p-ClPhOH through the Fenton reaction, wherein Fe ions activated H 2 O 2 to generate ·OH radicals. Due to the modification by PEI and Fe, the light absorption and excitation capabilities of CN were significantly enhanced, while the rate of photogenerated electron-hole recombination was suppressed, thereby greatly improving the photocatalytic activity. Moreover, the photocatalytic reaction also facilitated the in-situ generation of H 2 O 2 and promoted the reduction of Fe 3+ to Fe 2+ , further enhancing the efficiency of the Fenton reaction. The research results demonstrate that this photo-Fenton reaction exhibits highly efficient degradation of p-ClPhOH, with a maximum H 2 O 2 production rate of 102.6 µmol/L, which is 22 times higher than that of pristine CN. The combined two-step oxidation process of photocatalytic oxidation and Fenton oxidation shows remarkable effectiveness in degrading p-ClPhOH, indicating broad application prospects in the treatment of recalcitrant organic wastewater.This study not only reveals the superior performance of Fe-PEI-CN but also provides new insights and methods for exploring the application of novel photocatalysts in environmental governance. In the future, further optimization of catalyst synthesis methods and reaction conditions may further enhance their application effectiveness in actual water treatment processes, making a greater contribution to solving water pollution problems.

See the article:

Visible Light-Induced Photocatalysis–Self-Fenton Degradation of P-Clphoh over Graphitic Carbon Nitride by a Polyethylenimine Bifunctional Catalyst

https://doi.org/10.1007/s12209-024-00386-1

Transactions of Tianjin University

10.1007/s12209-024-00386-1

Visible Light-Induced Photocatalysis: Self-Fenton Degradation of p-ClPhOH Over Graphitic Carbon Nitride by a Polyethylenimine Bifunctional Catalyst

6-Apr-2024

Additional Media

Schematic Diagram of the Preparation Process and Structural Characterization Spectra of the Photocatalyst 5%Fe-4PEI-CN
First, graphene-like carbon nitride material (CN) was prepared using a two-step calcination method. Next, an electrostatic self-assembly strategy was employed to form covalent bonds between polyethyleneimine (PEI) and the NH2 groups on the surface of CN. Finally, Fe ions coordinated with the NH2 groups linked to PEI through covalent bonds. The XRD spectra showed that the pristine CN had two diffraction peaks at 2θ = 12.8o and 27.3o, corresponding to the (100) and (002) crystal planes of CN, resp Credit: Beijing Zhongke Journal Publising Co. Ltd.

Keywords

Photocatalysis

Article Information

Journal
Transactions of Tianjin University
DOI
10.1007/s12209-024-00386-1
Article Publication Date
2024-04-06
Article Title
Visible Light-Induced Photocatalysis: Self-Fenton Degradation of p-ClPhOH Over Graphitic Carbon Nitride by a Polyethylenimine Bifunctional Catalyst

Contact Information

LIngshu Qian
Beijing Zhongke Journal Publising Co. Ltd.
zhongkeqikan@mail.sciencep.com

How to Cite This Article

APA:
Beijing Zhongke Journal Publising Co. Ltd.. (2024, May 29). Visible light-induced photocatalysis–self-Fenton degradation of P-Clphoh over graphitic carbon nitride by a polyethylenimine bifunctional catalyst. Brightsurf News. https://www.brightsurf.com/news/8X53ZWO1/visible-light-induced-photocatalysisself-fenton-degradation-of-p-clphoh-over-graphitic-carbon-nitride-by-a-polyethylenimine-bifunctional-catalyst.html
MLA:
"Visible light-induced photocatalysis–self-Fenton degradation of P-Clphoh over graphitic carbon nitride by a polyethylenimine bifunctional catalyst." Brightsurf News, May. 29 2024, https://www.brightsurf.com/news/8X53ZWO1/visible-light-induced-photocatalysisself-fenton-degradation-of-p-clphoh-over-graphitic-carbon-nitride-by-a-polyethylenimine-bifunctional-catalyst.html.