Direct Z-Scheme Photocatalytic System: Insights into the Formative Factors of Photogenerated Carriers Transfer Channel from Ultrafast Dynamics DOI

Anqi Shi,

Dazhong Sun, Xuemei Zhang

et al.

ACS Catalysis, Journal Year: 2022, Volume and Issue: 12(15), P. 9570 - 9578

Published: July 21, 2022

The direct Z-scheme photocatalytic heterojunction, possessing type II band alignments but simultaneously realizing the spatial separation of photogenerated electrons and holes (PEHs) well-preserved strong redox ability, is a promising strategy for solving energy environmental issues. However, conventional method solely relying on direction interfacial electric field (IEF) to determine often different with experiments. Properly evaluating constructing remain limited. Herein, combining hybrid density functional theory excited state ultrafast dynamics simulation, we find that formative factor path comes from two aspects by systematically exploring series prototypical heterojunctions taking X2Y3 ferroelectrics (X: Al, Ga, In. Y: S, Se, Te) BCN semiconductors. On one hand, interlayer recombination PEHs weak ability can be significantly promoted IEF. other nonadiabatic coupling interface transfer channel plays key role in preserving high activity PEHs, which extend reacting time femtosecond hundreds nanosecond scale. This study deepens understanding formation accelerate design photocatalysts.

Language: Английский

Nitrogen Defects and Interfacial Chemical Bonds in Fe Single‐Site Mediated C3N4 With Rod‐Like Fe2O3 Enhanced the S‐Scheme Heterojunction for Efficient Energy Conversion DOI Open Access
Xinglin Wang, Huihui Zhang,

Yamei Huang

et al.

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 16, 2025

Abstract The rational design of S‐scheme heterojunctions holds significant potential for efficient photocatalytic energy conversion, attributed to their enhanced carrier separation efficiency and high redox capacity. Nevertheless, achieving precise control transfer dynamics in remains a substantial challenge. Herein, unique architecture is devised featuring porous rod‐shaped Fe 2 O 3 particles loaded onto single‐sites modified g‐C N 4 nanosheets via mediated heterocomponent anchorage, the directed growth using as anchoring points, thereby forming O─Fe─N interfacial chemical bonds (ICBs) generating abundant nitrogen defects (FeO/FeCN‐N v ). Photophysical processes are further investigated femtosecond transient absorption spectroscopy (fs‐TAS) situ irradiated X‐ray photoelectron (ISI‐XPS) with an adjustable wavelength irradiation light source. Encouragingly, results reveal internal electric field (IEF) constructed at these semicoherent phase boundaries, creating asymmetrical charge distribution. Simultaneously, introduce additional defect level that accelerates electron through IEF, enabling more rapid migration surface‐active sites both styrene epoxidation hydrogen evolution. synergistic effect ICBs coupling regulating offers new insights into photocatalysis, paving way advancements conversion.

Language: Английский

Citations

2
Effect of annealing temperature on morphology, optical, and photocatalytic characteristics of hydrothermally synthesized Bi(Ti0.5Co0.5)O3 perovskite nanorods DOI
Van‐Quyet Nguyen, Mahshab Sheraz,

Thi Chuyen Phan

et al.

Journal of Power Sources, Journal Year: 2025, Volume and Issue: 631, P. 236240 - 236240

Published: Jan. 20, 2025

Language: Английский

Citations

2
Design of well-defined shell–core covalent organic frameworks/metal sulfide as an efficient Z-scheme heterojunction for photocatalytic water splitting DOI Creative Commons
Yan Wang, Zhao Hu, Wei Wang

et al.

Chemical Science, Journal Year: 2021, Volume and Issue: 12(48), P. 16065 - 16073

Published: Jan. 1, 2021

A stable Z-scheme with well-defined architecture by in situ growth of COFs on CdS for photocatalytic water splitting is constructed. The T-COF shell can protect the catalytic center from deactivation and photocorrosion.

Language: Английский

Citations

75
Detecting and Quantifying Wavelength‐Dependent Electrons Transfer in Heterostructure Catalyst via In Situ Irradiation XPS DOI Creative Commons
Yukun Li, Li Wang, Fei Zhang

et al.

Advanced Science, Journal Year: 2022, Volume and Issue: 10(4)

Published: Nov. 14, 2022

The identity of charge transfer process at the heterogeneous interface plays an important role in improving stability, activity, and selectivity heterojunction catalysts. And, situ irradiation X-ray photoelectron spectroscopy (XPS) coupled with UV light optical fiber measurement setup is developed to monitor observe between heterojunction. However, in-depth relationship binding energy wavelength missing based on fact that incident formed by coupling different wavelengths. Furthermore, a quantitative understanding numbers remains elusive. Herein, g-C3 N4 /SnO2 model catalyst, wavelength-dependent Boltzmann function describe changes through utilizing continuously adjustable monochromatic XPS technique established. Using this method, study further reveals electrons number can be readily calculated forming asymptotic model. This methodology provides blueprint for deep charge-transfer rules facilitates future development highly active advanced

Language: Английский

Citations

70
Direct Z-Scheme Photocatalytic System: Insights into the Formative Factors of Photogenerated Carriers Transfer Channel from Ultrafast Dynamics DOI

Anqi Shi,

Dazhong Sun, Xuemei Zhang

et al.

ACS Catalysis, Journal Year: 2022, Volume and Issue: 12(15), P. 9570 - 9578

Published: July 21, 2022

The direct Z-scheme photocatalytic heterojunction, possessing type II band alignments but simultaneously realizing the spatial separation of photogenerated electrons and holes (PEHs) well-preserved strong redox ability, is a promising strategy for solving energy environmental issues. However, conventional method solely relying on direction interfacial electric field (IEF) to determine often different with experiments. Properly evaluating constructing remain limited. Herein, combining hybrid density functional theory excited state ultrafast dynamics simulation, we find that formative factor path comes from two aspects by systematically exploring series prototypical heterojunctions taking X2Y3 ferroelectrics (X: Al, Ga, In. Y: S, Se, Te) BCN semiconductors. On one hand, interlayer recombination PEHs weak ability can be significantly promoted IEF. other nonadiabatic coupling interface transfer channel plays key role in preserving high activity PEHs, which extend reacting time femtosecond hundreds nanosecond scale. This study deepens understanding formation accelerate design photocatalysts.

Language: Английский

Citations

64