Heterojunction photocatalyst of cavity shaped Bi2S3/g-C3N4 for bisphenol a degradation: Regulation of internal electric field via assistance of interfacial functional groups

Gu, Jiayu; Yu, Yong; Chen, Shouwen; Shi, Weican; Wang, Yimin; Liao, Ying; Chen, Huan; Jiang, Fang

doi:10.1016/j.cej.2021.130539

Cited by 30 publications

(4 citation statements)

References 67 publications

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“…As the Ag 2 S came in contact with Bi 2 SiO 5 , intimate contact in the interface was formed between p-type Ag 2 S and n-type Bi 2 SiO 5 . As shown in Figure C, because the Φ value of the Ag 2 S was higher than that of Bi 2 SiO 5 , the band of Ag 2 S shifted upward and the Bi 2 SiO 5 band shifted down until the Fermi level reached an energetic equilibration. − Therefore, the p–n heterostructure with a staggered band alignment and interface electric field between Ag 2 S and Bi 2 SiO 5 was formed, boosting the significant enhancement in the migration and separation of electron–hole pairs.…”

Section: Resultsmentioning

confidence: 99%

Construction of Ultrafine Ag₂S NPs Anchored onto 3D Network Rodlike Bi₂SiO₅ and Insight into the Photocatalytic Mechanism

et al. 2022

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A novel three-dimensional (3D) network rodlike Ag 2 S/ Bi 2 SiO 5 photocatalyst with a p−n heterostructure composed of ultrafine Ag 2 S nanoparticles (NPs) and Bi 2 SiO 5 nanosheets was prepared using an anionic self-regulation strategy by a two-step hydrothermal process. The architecture facilitated the efficient transfer and separation of photogenerated electron−hole pairs. The optimal Ag 2 S/Bi 2 SiO 5 composite (ABSO 0.10 ) exhibited an excellent reduction activity (93.5% Cr(VI) removal in wastewater containing 50 mg•L −1 Cr(VI) within 90 min under visible light), which was about 11.2 and 25.6 times higher than that of the pristine Ag 2 S and virgin Bi 2 SiO 5 , respectively. Assisted by experiments and density functional theory (DFT) calculations, a possible photocatalytic mechanism for Cr(VI) reduction over the Ag 2 S/Bi 2 SiO 5 composite under visible-light irradiation was proposed.

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Section: Resultsmentioning

confidence: 99%

Construction of Ultrafine Ag₂S NPs Anchored onto 3D Network Rodlike Bi₂SiO₅ and Insight into the Photocatalytic Mechanism

et al. 2022

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“…[17] The binding energies of Bi 4 f in the 10 %BBS/P-CN slightly increased, indicating that the outflow of electrons of Bi. [18] The analysis of XPS characterization results shows that CÀ S bond and charge transfer are formed at the interface of BBS and P-CN. As shown in Figure S4, under the light condition, the binding energy of C 1s and N 1s in 10 %BBS/P-CN increases compared with that under the dark condition, and the binding energy of Bi 4 f decreases, which means that the migration direction of photogenerated electrons under the light condition is from P-CN to BBS.…”

Section: Resultsmentioning

confidence: 99%

Interfacial C−S Bonds of g‐C₃N₄/Bi₁₉Br₃S₂₇ S‐Scheme Heterojunction for Enhanced Photocatalytic CO₂ Reduction**

Zhang

Wang

et al. 2022

Chemistry A European J

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Step‐scheme (S‐scheme) heterojunctions have been extensively studied in photocatalytic carbon dioxide (CO2) reduction due to their excellent charge separation and high redox ability. The built‐in electric field at the interface of a S‐scheme heterojunction serves as the driving force for charge transfer, however, the poor interfacial contact greatly restricts the carrier migration rate. Herein, we synthesized the g‐C3N4/Bi19Br3S27 S‐scheme heterostructure through in situ deposition of Bi19Br3S27 (BBS) on porous g‐C3N4 (P‐CN) nanosheets. The C−S bonds formed at the interface help to enhance the built‐in electric field, thereby promoting the charge transfer and separation. As a result, the CO2 reduction reaction performance of 10 %Bi19Br3S27/g‐C3N4 (BBS/P‐CN) reaches 32.78 μmol g−1h−1, which is 341.4 and 18.7 times higher than that of pure BBS and P‐CN, respectively. X‐ray photoelectron spectroscopy (XPS) and Fourier transform infrared spectroscopy (FTIR) prove the presence of chemical bonds (C−S) between the P‐CN and BBS. The S‐scheme charge‐transfer mechanism was analyzed via XPS and density functional theory (DFT) calculations. This work provides a new idea for designing heterojunction photocatalysts with interfacial chemical bonds to achieve high charge‐transfer and catalytic activity.

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“…Polar molecular modification has been regarded as an effective way to alter the electronic structure and promote the charge migration property. [67][68][69][70] Since the intrinsic dipole moment exists in the molecular, the IEF can be formed at the interface. [71] Besides, polar molecular can be self-assembled into the supramolecular with well-aligned dipole moment and macroscopic polarity.…”

Section: Polar Molecular Modification and Polar Molecular Self-assemblymentioning

confidence: 99%

Internal Electric Field on Steering Charge Migration: Modulations, Determinations and Energy‐Related Applications

Yue

Fan

Xiang

2021

Adv Funct Materials

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Energy‐related problems induced by ever‐continuous fossil consumption have arisen as one of the most challenging issues in the 21st century, imposing urgent demands on advanced materials to achieve high energy utilization and a sustainable society. In various solar energy utilization and solar‐to‐fuel energy conversion processes, charge carriers are the main and inevitable participators, and the charge dynamics related to their generation, migration, separation, and utilization is the key to advance the material design for settling the above issues. Internal electric field (IEF), also named as built‐in electric field, could guide directional migration of charge carriers, achieving effective charge separation, utilization, and prolonged lifetimes. This critical review begins with the discussion on various modulation strategies toward the IEF together with in‐detail elucidated mechanisms on its formation. Some cascade systems for telling the conclusive role from the induced IEF and the intrinsic design strategy are discussed. Then, a summary of the state‐of‐the‐art advances in the characterization means toward the IEF from both quantitative and qualitative perspectives is provided. Finally presented are IEF modulations in several specific energy‐related applications concerning solar cell, photocatalysis, photodetectors, and batteries to better understand its superiority for well‐performed material design, followed by perspectives on future development and opportunities of the IEF design.

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Heterojunction photocatalyst of cavity shaped Bi2S3/g-C3N4 for bisphenol a degradation: Regulation of internal electric field via assistance of interfacial functional groups

Cited by 30 publications

References 67 publications

Construction of Ultrafine Ag₂S NPs Anchored onto 3D Network Rodlike Bi₂SiO₅ and Insight into the Photocatalytic Mechanism

Construction of Ultrafine Ag₂S NPs Anchored onto 3D Network Rodlike Bi₂SiO₅ and Insight into the Photocatalytic Mechanism

Interfacial C−S Bonds of g‐C₃N₄/Bi₁₉Br₃S₂₇ S‐Scheme Heterojunction for Enhanced Photocatalytic CO₂ Reduction**

Internal Electric Field on Steering Charge Migration: Modulations, Determinations and Energy‐Related Applications

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Heterojunction photocatalyst of cavity shaped Bi2S3/g-C3N4 for bisphenol a degradation: Regulation of internal electric field via assistance of interfacial functional groups

Cited by 30 publications

References 67 publications

Construction of Ultrafine Ag2S NPs Anchored onto 3D Network Rodlike Bi2SiO5 and Insight into the Photocatalytic Mechanism

Construction of Ultrafine Ag2S NPs Anchored onto 3D Network Rodlike Bi2SiO5 and Insight into the Photocatalytic Mechanism

Interfacial C−S Bonds of g‐C3N4/Bi19Br3S27 S‐Scheme Heterojunction for Enhanced Photocatalytic CO2 Reduction**

Internal Electric Field on Steering Charge Migration: Modulations, Determinations and Energy‐Related Applications

Contact Info

Product

Resources

About

Construction of Ultrafine Ag₂S NPs Anchored onto 3D Network Rodlike Bi₂SiO₅ and Insight into the Photocatalytic Mechanism

Construction of Ultrafine Ag₂S NPs Anchored onto 3D Network Rodlike Bi₂SiO₅ and Insight into the Photocatalytic Mechanism

Interfacial C−S Bonds of g‐C₃N₄/Bi₁₉Br₃S₂₇ S‐Scheme Heterojunction for Enhanced Photocatalytic CO₂ Reduction**