The unique TiO2(B)/BiOCl0.7I0.3-P Z-scheme heterojunction effectively degrades and mineralizes the herbicide fomesafen

Cheng, Xueying; Guan, Renquan; Chen, Yunning; Sun, Yingnan; Shang, Qianqian

doi:10.1016/j.cej.2021.134021

Cited by 44 publications

(12 citation statements)

References 55 publications

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“…This indicates that electrons can migrate from ZnIn 2 S 4 to MXene or MXene QDs, leading to the aggregation of negative charges on MXene or MXene QDs. 56 The electron transfer direction of MXene QDs-ZnIn 2 S 4 under light irradiation is further confirmed by performing in situ irradiation XPS (Figure S11B-D). All the binding energies of Zn 2p, In 3d, and S 2p shift in the direction of high binding energy after illumination.…”

Section: Dft Calculations and Experimental Verificationmentioning

confidence: 69%

Establishing carrier transport channels based on TiS bonds and enhancing the photocatalytic performance of MXene quantum dots–ZnIn₂S₄ for ammonia synthesis

Cheng,

Guan,

et al. 2024

InfoMat

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In the process of photocatalytic synthesis of ammonia, the kinetics of carrier separation and transport, adsorption of nitrogen, and activation of the NN triple bond are key factors that directly affect the efficiency of converting nitrogen to ammonia. Here, we report a new strategy for anchoring MXene quantum dots (MXene QDs) onto the surface of ZnIn2S4 by forming TiS bonds, which provide a channel for the rapid separation and transport of charge carriers and effectively extend the lifespan of photogenerated carriers. The unique charge distribution caused by the sulfurization of the MXene QDs further enhances the performance of the photocatalysts for the adsorption and activation of nitrogen. The photocatalytic ammonia synthesis efficiency of MXene QDs–ZnIn2S4 can reach up to 360.5 μmol g−1 h−1. Density functional theory calculations, various in situ techniques, and ultrafast spectroscopy are used to characterize the successful construction of TiS bonds and the dynamic nature of excited state charge carriers in MXene QDs–ZnIn2S4, as well as their impact on nitrogen adsorption activation and photocatalytic ammonia synthesis efficiency. This study provides a new example of how to improve nitrogen adsorption and activation in photocatalytic material systems and enhance charge carrier dynamics to achieve efficient photocatalytic nitrogen conversion.image

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Section: Dft Calculations and Experimental Verificationmentioning

confidence: 69%

Establishing carrier transport channels based on TiS bonds and enhancing the photocatalytic performance of MXene quantum dots–ZnIn₂S₄ for ammonia synthesis

Cheng,

Guan,

et al. 2024

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“…3d), the chemical binding energies at 458.7, 461.27, 464.61 and 466.69 eV are ascribed to the Ti 4+ of TiO 2 , indicating the existence of TiO 2 in the TB-4 composite. 44 Compared with pure TiO 2 , the newly appeared peaks located at 461.27 and 466.69 eV may originate from the formation of Ti–O–Bi bonds. It shows that the anatase TiO 2 and BiOCl are connected by strong chemical bonds, rather than a simple physical mixture.…”

Section: Resultsmentioning

confidence: 97%

Construction of a TiO₂/BiOCl heterojunction for enhanced solar photocatalytic oxidation of nitric oxide

Zhao

Wang

et al. 2023

Dalton Trans.

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“…The nitrogen adsorption–desorption isotherms of TiO 2 , Vo-TiO 2 , and seven A-Vo-TiO 2 are shown in Figure e,f. Regardless of which bipyridine derivatives are used to modify Vo-TiO 2 , seven A-Vo-TiO 2 exhibit a type IV isotherm with H 3 hysteresis loops like TiO 2 and Vo-TiO 2 . This indicates that the modification of bipyridine derivatives has little effect on the pore structure of Vo-TiO 2 .…”

Section: Resultsmentioning

confidence: 98%

Synergistic Regulation of Hydrophobicity and Carrier Transport Based on Bipyridine Derivatives to Enhance the Photocatalytic Performance of Defective TiO₂ for Ammonia Synthesis

Guan,

Cheng,

Che

et al. 2024

ACS Sustainable Chem. Eng.

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The efficient adsorption and activation of nitrogen by photocatalysts, as well as the rapid transport and separation of charge carriers, are key factors affecting the efficiency of photocatalytic ammonia synthesis. This article achieves simultaneous regulation of surface hydrophobicity and carrier transport of defective TiO 2 (Vo-TiO 2 ) based on seven bipyridine derivatives with different substituent types and positions. Among the seven prepared composite photocatalysts, Vo-TiO 2 modified with 2,2bipyridyl-6,6-dicarboxylic acid (6-dcbpy-Vo-TiO 2 ) has a photocatalytic activity of 768 μmol g −1 h −1 for ammonia synthesis. By examining the hydrophobicity, absorbance, structural characteristics, defect changes, photoelectrochemical characteristics, etc. of the seven composite photocatalysts obtained and combining theoretical calculations, the influence mechanism of different substituent types and positions of bipyridine derivatives on the photocatalytic performance of Vo-TiO 2 for synthetic ammonia was revealed. This work provides an effective reference for the application of bipyridine derivatives on the photocatalytic nitrogen fixation for ammonia synthesis.

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The unique TiO2(B)/BiOCl0.7I0.3-P Z-scheme heterojunction effectively degrades and mineralizes the herbicide fomesafen

Cited by 44 publications

References 55 publications

Establishing carrier transport channels based on TiS bonds and enhancing the photocatalytic performance of MXene quantum dots–ZnIn₂S₄ for ammonia synthesis

Establishing carrier transport channels based on TiS bonds and enhancing the photocatalytic performance of MXene quantum dots–ZnIn₂S₄ for ammonia synthesis

Construction of a TiO₂/BiOCl heterojunction for enhanced solar photocatalytic oxidation of nitric oxide

Synergistic Regulation of Hydrophobicity and Carrier Transport Based on Bipyridine Derivatives to Enhance the Photocatalytic Performance of Defective TiO₂ for Ammonia Synthesis

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The unique TiO2(B)/BiOCl0.7I0.3-P Z-scheme heterojunction effectively degrades and mineralizes the herbicide fomesafen

Cited by 44 publications

References 55 publications

Establishing carrier transport channels based on TiS bonds and enhancing the photocatalytic performance of MXene quantum dots–ZnIn2S4 for ammonia synthesis

Establishing carrier transport channels based on TiS bonds and enhancing the photocatalytic performance of MXene quantum dots–ZnIn2S4 for ammonia synthesis

Construction of a TiO2/BiOCl heterojunction for enhanced solar photocatalytic oxidation of nitric oxide

Synergistic Regulation of Hydrophobicity and Carrier Transport Based on Bipyridine Derivatives to Enhance the Photocatalytic Performance of Defective TiO2 for Ammonia Synthesis

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Establishing carrier transport channels based on TiS bonds and enhancing the photocatalytic performance of MXene quantum dots–ZnIn₂S₄ for ammonia synthesis

Establishing carrier transport channels based on TiS bonds and enhancing the photocatalytic performance of MXene quantum dots–ZnIn₂S₄ for ammonia synthesis

Construction of a TiO₂/BiOCl heterojunction for enhanced solar photocatalytic oxidation of nitric oxide

Synergistic Regulation of Hydrophobicity and Carrier Transport Based on Bipyridine Derivatives to Enhance the Photocatalytic Performance of Defective TiO₂ for Ammonia Synthesis