Polypyrrole-decorated ZnO/g-C3N4 S-scheme photocatalyst for rhodamine B dye degradation: Mechanism and antibacterial activity

Chopan, Nisar Ahmad; Chishti, Hamida-Tun-Nisa

doi:10.1016/j.mtchem.2023.101643

Cited by 19 publications

(2 citation statements)

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“…The average fluorescence lifetimes <τ avg > of SPI and 9%ZnO/SPI were 6.01 and 5.20 ns, respectively. The calculation equation for the average fluorescence lifetime: τ avg = ( A 1 τ 1 2 + A 2 τ 2 2 )/( A 1 τ 1 + A 2 τ 2 ) . Compared with SPI, 9%ZnO/SPI has a shorter fluorescence lifetime, which means that faster electron transfer can occur at the material interface, promoting efficient separation of electron–hole pairs and inhibiting their recombination.…”

Section: Resultsmentioning

confidence: 99%

“…Not only that but we also used time-resolved photoluminescence decay spectroscopy (TRPL) to determine )/ (A 1 τ 1 + A 2 τ 2 ). 39 Compared with SPI, 9%ZnO/SPI has a shorter fluorescence lifetime, which means that faster electron transfer can occur at the material interface, promoting efficient separation of electron−hole pairs and inhibiting their recombination. Therefore, we can speculate that the addition of ZnO provides effective electron channels and transfer pathways for photogenerated electrons, which corresponds to the results in Figure 8.…”

Section: Optical and Electronic Propertiesmentioning

confidence: 99%

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Enhanced Photocurrent and Photocatalytic Performance of a π-Conjugated Polymer Hybridized with Hexagonal ZnO Nanotubes

Li,

Zhang,

Liu

et al. 2023

ACS Appl. Energy Mater.

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A sulfur-doped π-conjugated polyimide (SPI) photocatalyst hybridized with hexagonal zinc oxide (ZnO) nanotubes was prepared via an in situ crystallization method. This hybridization with ZnO significantly enhanced the photocurrent of SPI by a factor of 10 when exposed to full arc light irradiation. The photocatalytic hydrogen production activity of the resulting 13 wt % ZnO/SPI was enhanced by 14 times in comparison to SPI under full arc light irradiation. The remarkable enhancement in photocurrent and photocatalytic activity is attributed to the formation of a Z-scheme heterojunction. This heterojunction arises from a strong interfacial interaction between ZnO and SPI, facilitated by the formation of Zn−N bonds. This Zscheme heterojunction plays a crucial role in improving the separation and transport efficiency of photogenerated electron−hole pairs. This work provides valuable insights into the creation of novel inorganic−organic photocatalyst systems for future applications.

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Section: Resultsmentioning

confidence: 99%

Section: Optical and Electronic Propertiesmentioning

confidence: 99%

Enhanced Photocurrent and Photocatalytic Performance of a π-Conjugated Polymer Hybridized with Hexagonal ZnO Nanotubes

Li,

Zhang,

Liu

et al. 2023

ACS Appl. Energy Mater.

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Poly(ionic liquid) composite oxygenated graphite carbon nitride for enhanced photocatalytic and synergistic bacteriostasis

Song,

Luan,

Sun

et al. 2024

J of Applied Polymer Sci

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With the increase of drug‐resistant bacteria and the limitations of traditional antibacterial methods, photocatalytic inhibition has received widespread attention as a novel antibacterial method. In this paper, poly(1‐vinyl‐3‐ethylimidazolium tetrafluoroborate) composite oxygenated carbon nitride (PBF‐OCN) were prepared by in situ free radical polymerization using 1‐vinyl‐3‐ethylimidazolium tetrafluoroborate and OCN. The results showed that the light absorption ability and electron hole separation rate of PBF‐OCN were greatly improved compared with that of OCN, and the rate constant for photocatalytic removal MB of PBF‐OCN‐1 was about 1.39 times of that OCN. The growth of Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus) could be significantly inhibited by PBF‐OCN under visible light, among which, the inhibition of PBF‐OCN‐3 was the most excellent, with the diameter of the circle of inhibition reaching 20.69 mm for E. coli, and 21.30 mm for S. aureus, and the inhibition rate against E. coli calculated by plate counting method reached 97.0%. The minimum inhibitory concentration for E. coli and S. aureus was 0.0625 mg/mL, respectively, and the possible inhibition mechanism of the samples was explored. The good synergistic antibacterial effect of PBF‐OCN is expected to be applied in water treatment, antibacterial devices, packaging materials, and other fields.

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g‐C₃N₄ Based Composite Materials for Photo‐Fenton Reaction in Water Remediation: A Review of Synthesis Methods, Mechanism and Applications

Bai,

Zheng,

Shen

et al. 2024

ChemCatChem

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Organic pollutants in water pose significant challenges for water treatment due to their harmful effects and resistance to conventional methods. The rapid increase in industrial wastewater discharge has heightened the need for effective pollutant degradation techniques. Photo‐Fenton technology, an advanced oxidation process, has gained attention for its ability to degrade a wide range of organic contaminants in water. Developing high‐performance photo‐Fenton catalysts is therefore crucial. Graphitic carbon nitride (g‐C3N4) stands out in this field due to its suitable energy band structure, stable properties, and simple synthesis process. However, its application is limited by a low specific surface area, narrow light absorption, and high recombination rate of photogenerated carriers. This review provides a concise overview of current research on g‐C3N4 in photo‐Fenton technology, covering synthesis methods, modifications, and the mechanisms enhancing its photo‐Fenton activity. It also highlights key factors affecting g‐C3N4’s effectiveness in photo‐Fenton reactions and discusses recent advancements in its applications. The review concludes with an analysis of existing challenges and potential future directions for g‐C3N4‐based photo‐Fenton catalysts, offering theoretical insights to advance their industrial use in wastewater treatment.

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Polypyrrole-decorated ZnO/g-C3N4 S-scheme photocatalyst for rhodamine B dye degradation: Mechanism and antibacterial activity

Cited by 19 publications

References 84 publications

Enhanced Photocurrent and Photocatalytic Performance of a π-Conjugated Polymer Hybridized with Hexagonal ZnO Nanotubes

Enhanced Photocurrent and Photocatalytic Performance of a π-Conjugated Polymer Hybridized with Hexagonal ZnO Nanotubes

Poly(ionic liquid) composite oxygenated graphite carbon nitride for enhanced photocatalytic and synergistic bacteriostasis

g‐C₃N₄ Based Composite Materials for Photo‐Fenton Reaction in Water Remediation: A Review of Synthesis Methods, Mechanism and Applications

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Polypyrrole-decorated ZnO/g-C3N4 S-scheme photocatalyst for rhodamine B dye degradation: Mechanism and antibacterial activity

Cited by 19 publications

References 84 publications

Enhanced Photocurrent and Photocatalytic Performance of a π-Conjugated Polymer Hybridized with Hexagonal ZnO Nanotubes

Enhanced Photocurrent and Photocatalytic Performance of a π-Conjugated Polymer Hybridized with Hexagonal ZnO Nanotubes

Poly(ionic liquid) composite oxygenated graphite carbon nitride for enhanced photocatalytic and synergistic bacteriostasis

g‐C3N4 Based Composite Materials for Photo‐Fenton Reaction in Water Remediation: A Review of Synthesis Methods, Mechanism and Applications

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Product

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g‐C₃N₄ Based Composite Materials for Photo‐Fenton Reaction in Water Remediation: A Review of Synthesis Methods, Mechanism and Applications