Effective H₂O₂ Photosynthesis in Gas–Liquid–Solid Triphase System with Self‐Floating Conjugated Organic Polymers

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(38)

Published: April 9, 2024

Abstract Solar‐driven photocatalytic oxygen reduction is a promising pathway for sustainable hydrogen peroxide (H 2 O ) production. However, limited diffusion and low selectivity in the two‐electron reaction hinder its practical application. Here, novel conjugated organic polymer material (conjugated triazine‐thiophene polymer, CTTP) based on triazine thiophene, integrating favorable mass transfer structure with competent catalytic centers presented first time. Remarkably, under gas–liquid–solid triphase condition, self‐floating CTTP can rapidly capture gaseous oxygen, reducing it to superoxide radicals transferring them interface, drastically enhancing H yield. An excellent concentration of 1.85 m g −1 h achieved system, representing remarkable 14‐fold improvement compared liquid solid phase reaction. Interestingly, system demonstrates potential large‐scale production 8 sunlight irradiation, reaching 293 ppm day −2 . This work opens up new avenue construction systems may stimulate future related research.

Language: Английский

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Construction of a Visible-Light-Response Photocatalysis–Self-Fenton Degradation System of Coupling Industrial Waste Red Mud to Resorcinol–Formaldehyde Resin

Molecules, Journal Year: 2024, Volume and Issue: 29(7), P. 1514 - 1514

Published: March 28, 2024

Heterogeneous photocatalysis–self-Fenton technology is a sustainable strategy for treating organic pollutants in actual water bodies with high-fluent degradation and high mineralization capacity, overcoming the limitations of safety risks caused by adding external iron sources hazardous chemicals homogeneous Fenton reaction injecting high-intensity energy fields photo-Fenton reaction. Herein, photo-self-Fenton system based on resorcinol–formaldehyde (RF) resin red mud (RM) was established to generate hydrogen peroxide (H2O2) situ transform into hydroxy radical (•OH) efficient tetracycline (TC) under visible light irradiation. The capturing experiments electron spin resonance (ESR) confirmed that hinge enhanced performance this superior H2O2 yield (499 μM) through oxygen reduction process (ORR) two-step single-electron over concentration •OH due activation effect RM. In addition, Fe2+/Fe3+ cycles are accelerated photoelectrons effectively initiate Finally, possible pathways were proposed via liquid chromatography-mass spectrometry (LC-MS). This study provides new idea environmental recovery waste-based heterogeneous photocatalytic self-Fenton system.

Language: Английский

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Synergistic advancements in nanocomposite design: Harnessing the potential of mixed metal oxide/reduced graphene oxide nanocomposites for multifunctional applications

Journal of Energy Storage, Journal Year: 2024, Volume and Issue: 93, P. 112317 - 112317

Published: May 31, 2024

Language: Английский

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Nanoengineering of Porous 2D Structures with Tunable Fluid Transport Behavior for Exceptional H₂O₂ Electrosynthesis

Nano Letters, Journal Year: 2024, Volume and Issue: 24(5), P. 1650 - 1659

Published: Jan. 24, 2024

Precision nanoengineering of porous two-dimensional structures has emerged as a promising avenue for finely tuning catalytic reactions. However, understanding the pore-structure-dependent performance remains challenging, given lack comprehensive guidelines, appropriate material models, and precise synthesis strategies. Here, we propose optimization carbon materials through utilization mesopores with 5–10 nm diameter to facilitate fluid acceleration, guided by finite element simulations. As proof concept, optimized mesoporous nanosheet sample exhibited exceptional electrocatalytic performance, demonstrating high selectivity (>95%) notable diffusion-limiting disk current density −3.1 mA cm–2 H2O2 production. Impressively, electrolysis process in flow cell achieved production rate 14.39 mol gcatalyst–1 h–1 yield medical-grade disinfectant-worthy solution. Our pore engineering research focuses on modulating oxygen reduction reaction activity affecting local transport behavior, providing insights into mesoscale mechanism.

Language: Английский

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Photocatalytic hydrogen peroxide production: Advances, mechanistic insights, and emerging challenges

Journal of environmental chemical engineering, Journal Year: 2024, Volume and Issue: 12(5), P. 114143 - 114143

Published: Sept. 16, 2024

Language: Английский

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