Boosted electron-transfer by coupling Ag and Z-scheme heterostructures in CdSe-Ag-WO3-Ag for excellent photocatalytic H2 evolution with simultaneous degradation

Li, Siyi; Wang, Jingchao; Yao, Xia; Li, Peiyu; Wu, Yue; Yang, Kunlong; Song, Yuxin; Jiang, Shuang; Zhang, Tianyong; Li, Bin

doi:10.1016/j.cej.2021.129298

Cited by 59 publications

(13 citation statements)

References 49 publications

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“…43 In the Ag 3d spectral region (Fig. 3e), two major peaks centered at 368.0 and 374.0 eV are related to the Ag 3d 5/2 and Ag 3d 3/2 spin orbitals of metallic Ag, 44 which is consistent with the HRTEM image results. In addition, the Mn 2p 3/2 and Mn 2p 1/2 orbitals correspond to the main peaks centered at 641.5 and 653.2 eV, respectively (Fig.…”

Section: Resultssupporting

confidence: 84%

Facilitating space charge directional separation for enhancing photocatalytic CO₂ reduction over tetragonal BiVO₄

Dai

et al. 2022

Catal. Sci. Technol.

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Section: Resultssupporting

confidence: 84%

Facilitating space charge directional separation for enhancing photocatalytic CO₂ reduction over tetragonal BiVO₄

Dai

et al. 2022

Catal. Sci. Technol.

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“…In Figure S7d, Bi 5 O 7 I exhibits a positive slope, suggesting that Bi 5 O 7 I is an n-type semiconductor and the E f value of Bi 5 O 7 I was −0.288 eV versus NHE. Generally, the E CB values of the n-type semiconductors are close to those of E f (lower 0.1–0.3 eV) and the E VB values of the p-type semiconductors are close to those of E f (higher 0.1–0.3 eV) because of the electron effective mass and the carrier concentration. , According to the results of the Mott–Schottky plots, E CB of Bi 5 O 7 I was −0.388 eV and E VB of BiOI was +2.072 eV. E CB and E VB could be obtained by the equation E CB = E VB – E g . , Thus, E CB of BiOI was +0.312 eV, and E VB of Bi 5 O 7 I was +2.042 eV.…”

Section: Resultsmentioning

confidence: 77%

Bacitracin-Controlled BiOI/Bi₅O₇I Nanosheet Assembly and S-Scheme Heterojunction Formation for Enhanced Photocatalytic Performances

Wang

Yang

et al. 2022

ACS Appl. Nano Mater.

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Coupling heterojunction is an effective and feasible approach to suppressing the electron–hole recombination of a photocatalyst. However, the heterojunction performance is limited by poor interface contact between two semiconductors. Therefore, an in situ partial conversion procedure was proposed to fabricate the flower-spherical BiOI/Bi5O7I (BBOI) heterojunction using bacitracin as a template. The introduction of bacitracin can regulate the assembly of nanosheets into a flower-spherical structure, which caused the BBOI photocatalysts to have larger specific surface areas than BiOI or Bi5O7I. In particular, the dosage of bacitracin can control the thermal conversion of BiOI to Bi5O7I. The in situ partial conversion of BiOI caused the formation of an intimate S-scheme heterojunction interface between BiOI and Bi5O7I, which efficiently inhibited the combination of photogenerated carriers. Upon visible-light irradiation, BBOI-3 exhibited the highest catalytic ability for the simultaneous reduction of Cr(VI) (100%) and oxidative degradation of tetracycline hydrochloride (TH) (80.0%). This work provides an opinion to construct the high-performance heterojunction photocatalysts to environmental remediation.

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“…Figure d shows the X-ray spectrum of O 1s, and the fitting values of the three diffraction peaks are 529.33, 531.68, and 533.55 eV, respectively. Among them, the peak position of the oxide lattice oxygen is located at 529.33 eV, and the oxygen diffraction peak position of −OH is 531.68 eV, while the 533.55 eV peak corresponds to the absorption of water molecules . In addition, the XPS spectra of the composite catalyst were significantly offset compared with those of the single catalyst, which indicated that there was a strong interaction between CeO 2 and Ag/Ag 2 O due to electron transfer.…”

Section: Resultsmentioning

confidence: 98%

In Situ Synthesis of Ag/Ag₂O on CeO₂ for Boosting Electron Transfer in Photocatalytic Hydrogen Production

Wang

Guo

et al. 2022

J. Phys. Chem. C

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A simple and effective photocatalytic system has always been the goal of photocatalytic research. In this study, Ag/Ag2O was grown in situ on a CeO2 substrate by a one-step method to form a Ag/Ag2O/CeO2 photocatalyst. The close combination of the two made the composite catalyst have more effective hydrogen evolution sites. The Ag/Ag2O/CeO2 composite catalyst has a wide light absorption wavelength, low overpotential, and small electrochemical impedance, which are favorable for the development of a photocatalytic system. CeO2 and Eosin Y continue to provide photogenerated electrons as electron donors, while the heterostructure of the Ag/Ag2O/CeO2 system enables the separation of electrons on the conduction band of CeO2. The ingenious coordination of the two can effectively isolate the photogenerated electron–hole pairs, thus supporting the continuous progress of photocatalytic hydrogen evolution. Importantly, Ag/Ag2O/CeO2 has excellent photocatalytic performance for hydrogen production; in particular, Ag/Ag2O/CeO2-30 has the highest hydrogen production efficiency, which is much higher than those of Ag/Ag2O and CeO2. Therefore, Ag/Ag2O/CeO2 can be considered as a photocatalyst worth developing.

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Boosted electron-transfer by coupling Ag and Z-scheme heterostructures in CdSe-Ag-WO3-Ag for excellent photocatalytic H2 evolution with simultaneous degradation

Cited by 59 publications

References 49 publications

Facilitating space charge directional separation for enhancing photocatalytic CO₂ reduction over tetragonal BiVO₄

Facilitating space charge directional separation for enhancing photocatalytic CO₂ reduction over tetragonal BiVO₄

Bacitracin-Controlled BiOI/Bi₅O₇I Nanosheet Assembly and S-Scheme Heterojunction Formation for Enhanced Photocatalytic Performances

In Situ Synthesis of Ag/Ag₂O on CeO₂ for Boosting Electron Transfer in Photocatalytic Hydrogen Production

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Boosted electron-transfer by coupling Ag and Z-scheme heterostructures in CdSe-Ag-WO3-Ag for excellent photocatalytic H2 evolution with simultaneous degradation

Cited by 59 publications

References 49 publications

Facilitating space charge directional separation for enhancing photocatalytic CO2 reduction over tetragonal BiVO4

Facilitating space charge directional separation for enhancing photocatalytic CO2 reduction over tetragonal BiVO4

Bacitracin-Controlled BiOI/Bi5O7I Nanosheet Assembly and S-Scheme Heterojunction Formation for Enhanced Photocatalytic Performances

In Situ Synthesis of Ag/Ag2O on CeO2 for Boosting Electron Transfer in Photocatalytic Hydrogen Production

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Product

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Facilitating space charge directional separation for enhancing photocatalytic CO₂ reduction over tetragonal BiVO₄

Facilitating space charge directional separation for enhancing photocatalytic CO₂ reduction over tetragonal BiVO₄

Bacitracin-Controlled BiOI/Bi₅O₇I Nanosheet Assembly and S-Scheme Heterojunction Formation for Enhanced Photocatalytic Performances

In Situ Synthesis of Ag/Ag₂O on CeO₂ for Boosting Electron Transfer in Photocatalytic Hydrogen Production