Dual defect regulation of BiOCl halogen layer enables photocatalytic O2 activation into singlet oxygen for refractory aromatic pollutant removal

Sun, Yandong; Han, Weiguang; Zhang, Fangyuan; Li, Hui; Zhang, Ziqi; Zhang, Xue; Shen, Boxiong; Guo, Sheng-Qi; Ma, Tianyi

doi:10.1016/j.apcatb.2023.123689

Cited by 19 publications

(1 citation statement)

References 45 publications

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“…To theoretically demonstrate the effect of carbon layer on the enhancement of photocatalytic phenol degradation, the free energies of O 2 activation on the surface of BiOBr and graphite were calculated. According to the DFT calculation results, the paths of the activation of O 2 on different surfaces are drawn and displayed in Figure , in which the O 2 molecule adsorbs and is reduced to •O 2 – by photoexcited electrons first and then transforms to 1 O 2 by reacting with h + or H 2 O . In Figure , we can see that the formation of •O 2 – from O 2 either in BiOBr or on the graphene surface is an exothermic reaction.…”

Section: Resultsmentioning

confidence: 99%

One-Pot Synthesis of C@BiOBr for Efficient Photocatalytic Degradation of Phenol

Han,

Liu,

Zhang

et al. 2024

Langmuir

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This work describes the synthesis of C@BiOBr using glucose as the carbon precursor by a repeatable one-step hydrothermal method. Characterization studies indicate that the structure of BiOBr did not change after the carbon layer was encapsulated on the surface. The highest activity is achieved at 1.2-C@BiOBr, with 97% of phenol (50 mg•L -1 ) degrading within 90 min, and the degradation amount of phenol is determined to be 48.5 mg•g −1 with a speed of 0.54 mg•g −1 •min −1 . The useful species of phenol degradation are studied and assigned to •O 2 − , 1 O 2 , and h + . The effect of coated carbon layer for photocatalytic degradation of phenol over BiOBr is studied by photoelectrochemical experiments, fluorescence spectra, and density functional theory (DFT) calculations. It is attributed to the good conductivity of carbon, enhanced separation of the photocarriers by carbon coating, and thermodynamically favorable reactive oxygen species (ROS) production on the surface of carbon. This work demonstrates that carbon coating is an effective strategy to improve the photocatalytic activity of BiOBr and reveals the detailed mechanism.

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Section: Resultsmentioning

confidence: 99%

One-Pot Synthesis of C@BiOBr for Efficient Photocatalytic Degradation of Phenol

Han,

Liu,

Zhang

et al. 2024

Langmuir

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Localized Surface Plasmon Resonance‐Enhanced Photocatalytic Antibacterial of In Situ Sprayed 0D/2D Heterojunction Composite Hydrogel for Treating Diabetic Wound

Wang,

Li,

Fan

et al. 2024

Adv Healthcare Materials

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Chronic diabetic wounds pose significant challenges due to uncontrolled bacterial infections, prolonged inflammation, and impaired angiogenesis. The rapid advancement of photo‐responsive antibacterial therapy showed promise in addressing these complex issues, particularly utilizing 2D heterojunction materials, which offer unique properties. Herein, we designed an in situ sprayed Bi/BiOCl 0D/2D heterojunction composite fibrin gel with the characteristics of rapid formation and effective near‐infrared activation for the treatment of non‐healing diabetes‐infected wounds. The sprayed composite gel can provide protective shielding for skin tissues and promote endothelial cell proliferation, vascularization, and angiogenesis. The Bi/BiOCl 0D/2D heterojunction, with its localized surface plasmon resonance (LSPR), can overcome the wide bandgap limitation of BiOCl, enhancing the generation of local heat and reactive oxygen species under near‐infrared irradiation. This facilitated bacterial elimination and reduced inflammation, supporting the accelerated healing of diabetes‐infected wounds. Our study underscores the potential of LSPR‐enhanced heterojunctions as advanced wound therapies for chronic diabetic wounds.This article is protected by copyright. All rights reserved

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Enhanced Photocatalytic Degradation Performance by Micropore‐Confined Charge Transfer in Hydrogen‐Bonded Organic Framework‐Like Cocrystals

Wang,

Deng,

Bai

et al. 2024

Small

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Carrier utilization in organic photocatalytic materials is unsatisfactory due to the large exciton binding energy and short exciton diffusion length. Both donor–acceptor (D–A) strategies and porous designs are promising approaches to improve carrier utilization in photocatalysts. However, a more efficient way is to shorten the distance of exciton migration to the catalyst surface by the charge transfer (CT) process. Herein, hydrogen‐bonded organic framework‐like cocrystal (NDI‐Cor HOF‐cocrystal) is prepared with novel structures serving as a proof of concept for the approach, using N, N'‐bis (5‐isophthalate) naphthalimide (NDI‐COOH) as the porous framework and acceptor, and Coronene (Cor) as the donor unit. CT and porous engineering are integrated through cocrystal strategy. Under light irradiation, photogenerated excitons transfer and dissociate from the inner surface of the micropores on a hundred‐picosecond time scale, where efficient radical transformation and further redox reactions with adsorbed phenol molecules occur. NDI‐Cor HOF‐cocrystal photocatalytic degradation of phenol is 15 times higher than that of original HOFs, and achieves near 90% deep mineralization of phenol. Significantly, this work has designed novel HOF‐cocrystal and also provides new modification strategies for high performance organic photocatalysts.

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Dual defect regulation of BiOCl halogen layer enables photocatalytic O2 activation into singlet oxygen for refractory aromatic pollutant removal

Cited by 19 publications

References 45 publications

One-Pot Synthesis of C@BiOBr for Efficient Photocatalytic Degradation of Phenol

One-Pot Synthesis of C@BiOBr for Efficient Photocatalytic Degradation of Phenol

Localized Surface Plasmon Resonance‐Enhanced Photocatalytic Antibacterial of In Situ Sprayed 0D/2D Heterojunction Composite Hydrogel for Treating Diabetic Wound

Enhanced Photocatalytic Degradation Performance by Micropore‐Confined Charge Transfer in Hydrogen‐Bonded Organic Framework‐Like Cocrystals

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