Molecular assembly of carbon nitride-based composite membranes for photocatalytic sterilization and wound healing

Shen, Yanfei; Peng, Xiaoxiao; Ma, Jin; Zhou, Zhixin; Yang, Hong; Chen, Jingjing; Chen, Ran; Wu, Kaiqing; Xi, Guangcheng; Liu, Songqin; Zhang, Hongjie

doi:10.1039/d3sc00642e

Cited by 4 publications

(4 citation statements)

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“…The intermediates were further characterized by EPR experiments during the photocatalytic H 2 O 2 production process via C 5 N 2 with ultrasonication to get the formation mechanism for H 2 O 2 . DMPO and TEMP were used to capture the in situ generated • O 2 – , • OH, and 1 O 2 , respectively. , After ultrasonication and weak light were applied, the • O 2 – and 1 O 2 signals could not be observed, indicating a direct 2e – ORR process in H 2 O 2 production (Figure S16). As the CB position of C 5 N 2 was exceptionally lower than the one-electron ORR potential in thermodynamic (−0.33 V vs NHE), it was reasonable that the one-electron reduction of O 2 to form • O 2 – was excluded.…”

Section: Resultsmentioning

confidence: 99%

H₂O₂ Photosynthesis from H₂O and O₂ under Weak Light by Carbon Nitrides with the Piezoelectric Effect

Ma,

Peng,

Peng

et al. 2024

J. Am. Chem. Soc.

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Driven by the essential need of a green, safe, and low-cost approach to producing H 2 O 2 , a highly valuable multifunctional chemical, artificial photosynthesis emerges as a promising avenue. However, current catalyst systems remain challenging, due to the need of high-density sunlight, poor selectivity and activity, or/and unfavorable thermodynamics. Here, we reported that an indirect 2e − water oxidation reaction (WOR) in photocatalytic H 2 O 2 production was unusually activated by C 5 N 2 with piezoelectric effects. Interestingly, under ultrasonication, C 5 N 2 exhibited an overall H 2 O 2 photosynthesis rate of 918.4 μM/h and an exceptionally high solar-to-chemical conversion efficiency of 2.6% after calibration under weak light (0.1 sun). Mechanism studies showed that the piezoelectric effect of carbon nitride overcame the high uphill thermodynamics of *OH intermediate generation, which enabled a new pathway for 2e − WOR, the kinetic limiting step in the overall H 2 O 2 production from H 2 O and O 2 . Benefiting from the outstanding sonication-assisted photocatalytic H 2 O 2 generation under weak light, the concept was further successfully adapted to biomedical applications in efficient sono-photochemodynamic therapy for cancer treatment and water purification.

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Section: Resultsmentioning

confidence: 99%

H₂O₂ Photosynthesis from H₂O and O₂ under Weak Light by Carbon Nitrides with the Piezoelectric Effect

Ma,

Peng,

Peng

et al. 2024

J. Am. Chem. Soc.

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“…The poor dispersibility of CN material leads to its unstable luminescence and thus causes inaccuracy detection. Only a few articles 139–142 have described the dispersion of CN materials. Generally speaking, the dispersion methods for CN include dissolving with concentrated sulfuric acid, steam embedding, ultrasonic treatment, dissolving in nonpolar solvents, and so forth.…”

Section: Discussionmentioning

confidence: 99%

Insight into structure evolution of carbon nitrides and its energy conversion as luminescence

Zhang,

Chen

et al. 2024

Carbon Energy

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A series of carbon nitride (CN) materials represented by graphitic carbon nitride (g‐C3N4) have been widely used in bioimaging, biosensing, and other fields in recent years due to their nontoxicity, low cost, and high luminescent quantum efficiency. What is more attractive is that the luminescent properties such as wavelength and intensity can be regulated by controlling the structure at the molecular level. Hence, it is time to summarize the related research on CN structural evolution and make a prospect on future developments. In this review, we first summarize the research history and multiple structural evolution of CN. Then, the progress of improving the luminescence performance of CN through structural evolution was discussed. Significantly, the relationship between CN structure evolution and energy conversion in the forms of photoluminescence, chemiluminescence, and electrochemiluminescence was reviewed. Finally, key challenges and opportunities such as nanoscale dispersion strategy, luminous efficiency improving methods, standardization evaluation, and macroscopic preparation of CN are highlighted.

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“…Notably, owing to the absence of metallic elements, the material exhibits minimal toxicity to normal tissue cells. Moreover, when applied to treat infected wounds, it significantly enhances wound regeneration in mouse wounds infected with Streptococcus mutans (S. aureus) [Figure 10C] [109] .…”

Section: Treatment Of Bacterial Infectionsmentioning

confidence: 99%

“…Efficient promotion of infectious wound regeneration in mice with S. aureus-infected dermal wounds is demonstrated [109] pCN/CNTs Photocatalytic bacteria-killing…”

Section: Treatment Of Bacterial Infectionsmentioning

confidence: 99%

Recent progress in graphitic carbon nitride-based materials for antibacterial applications: synthesis, mechanistic insights, and utilization

Zhang,

Wu,

Zhang

et al. 2024

Microstructures

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Recent breakthroughs in graphitic carbon nitride (g-C3N4)-based materials have catalyzed the development of highly effective antibacterial strategies. This comprehensive review delves into the synthesis, mechanistic insights, and applications of g-C3N4 in the realm of antibacterial research. The introduction first highlights the importance of antibacterial materials, emphasizing the urgent need for innovative solutions in the face of bacterial infections and the escalating challenges posed by antibiotic resistance. Continuing, the structural attributes and distinctive characteristics of g-C3N4 are examined in detail, elucidating its inherent properties that make it a compelling candidate for antibacterial applications. Subsequently, we meticulously dissect various methods used in the synthesis of g-C3N4, encompassing both top-down and bottom-up approaches, offering valuable insights into the production of this promising nanomaterial. Furthermore, it delves deeper into the sterilization mechanisms of g-C3N4-based nanomaterials, encompassing a spectrum of strategies, including physical structure sterilization, photocatalytic antibacterial effects, enzymatic antibacterial processes, and the synergetic benefits that emerge from the fusion of these mechanisms. Then, it comprehensively examines the practical applications of g-C3N4-based nanomaterials in antibacterial endeavors, encompassing their pivotal roles in water purification, air purification, treatment of bacterial infections, and the development of antibacterial layers in diverse settings. In conclusion, we encapsulate the crux of our findings and provide a forward-looking perspective on the potential challenges and opportunities in the arena of g-C3N4-based materials for antibacterial applications. This review aspires to galvanize further exploration and innovation in the design of high-performance g-C3N4-based materials, thereby contributing to the progression of antibacterial solutions.

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Molecular assembly of carbon nitride-based composite membranes for photocatalytic sterilization and wound healing

Abstract: Polymeric carbon nitride (pCN) has attracted increasing interest as a metal-free photocatalyst because of its high efficiency in reactive oxygen species (ROS) generation. However, due to poor solubility, compounding pCN...

Cited by 4 publications

References 94 publications

H₂O₂ Photosynthesis from H₂O and O₂ under Weak Light by Carbon Nitrides with the Piezoelectric Effect

H₂O₂ Photosynthesis from H₂O and O₂ under Weak Light by Carbon Nitrides with the Piezoelectric Effect

Insight into structure evolution of carbon nitrides and its energy conversion as luminescence

Recent progress in graphitic carbon nitride-based materials for antibacterial applications: synthesis, mechanistic insights, and utilization

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Molecular assembly of carbon nitride-based composite membranes for photocatalytic sterilization and wound healing

Abstract: Polymeric carbon nitride (pCN) has attracted increasing interest as a metal-free photocatalyst because of its high efficiency in reactive oxygen species (ROS) generation. However, due to poor solubility, compounding pCN...

Cited by 4 publications

References 94 publications

H2O2 Photosynthesis from H2O and O2 under Weak Light by Carbon Nitrides with the Piezoelectric Effect

H2O2 Photosynthesis from H2O and O2 under Weak Light by Carbon Nitrides with the Piezoelectric Effect

Insight into structure evolution of carbon nitrides and its energy conversion as luminescence

Recent progress in graphitic carbon nitride-based materials for antibacterial applications: synthesis, mechanistic insights, and utilization

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Product

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H₂O₂ Photosynthesis from H₂O and O₂ under Weak Light by Carbon Nitrides with the Piezoelectric Effect

H₂O₂ Photosynthesis from H₂O and O₂ under Weak Light by Carbon Nitrides with the Piezoelectric Effect