Dual interfacial electric fields in black phosphorus/MXene/MBene enhance broad-spectrum carrier migration efficiency of photocatalytic devices DOI Creative Commons
Hong-Rui Zhu,

Liuxiaohui Gou,

Chunxue Li

et al.

Device, Journal Year: 2024, Volume and Issue: 2(3), P. 100283 - 100283

Published: Feb. 7, 2024

The formation of interfacial electric fields using semiconductors/co-catalysts can effectively improve the carrier migration efficiency photocatalytic devices. Herein, an ultrathin 2D/2D/2D black phosphorus/MXene/MBene (denoted as BP/Ti3C2/MoB) ternary heterojunction with enhanced charge transfer is designed dual fields. formed by BP/Ti3C2 and Ti3C2/MoB accelerate photogenerated transfer, change position d-band center Ti atoms, lower energy level antibonding state, enhance adsorption effect H∗ active species, which ultimately leads to significant enhancement activity. results show that optimum visible-light-induced H2 evolution rate BP/Ti3C2/MoB 8,624 μmol g−1 h−1, has a very high factor (∼1,563%) compared pure BP. charge-transfer pathways mechanism are further elucidated some state-of-the-art spectroscopic characterizations theoretical calculations.

Language: Английский

Verifying the Charge‐Transfer Mechanism in S‐Scheme Heterojunctions Using Femtosecond Transient Absorption Spectroscopy DOI
Chang Cheng, Jianjun Zhang, Bicheng Zhu

et al.

Angewandte Chemie International Edition, Journal Year: 2022, Volume and Issue: 62(8)

Published: Dec. 29, 2022

The S-scheme heterojunction is flourishing in photocatalysis because it concurrently realizes separated charge carriers and sufficient redox ability. Steady-state transfer has been confirmed by other methods. However, an essential part, the dynamics heterojunctions, still missing. To compensate, a series of cadmium sulfide/pyrene-alt-difluorinated benzothiadiazole heterojunctions were constructed photophysical processes investigated with femtosecond transient absorption spectroscopy. Encouragingly, interfacial charge-transfer signal was detected spectra heterojunction, which provides solid evidence for to complement results from well-established Furthermore, lifetime calculated be ca. 78.6 ps. Moreover, photocatalysts exhibit higher photocatalytic conversion 1,2-diols H2 production rates than bare sulfide.

Language: Английский

Citations

172
H2-production and electron-transfer mechanism of a noble-metal-free WO3@ZnIn2S4 S-scheme heterojunction photocatalyst DOI
Shuang Cao, Jiaguo Yu, S. Wageh

et al.

Journal of Materials Chemistry A, Journal Year: 2022, Volume and Issue: 10(33), P. 17174 - 17184

Published: Jan. 1, 2022

A novel noble-metal-free WO 3 @ZnIn 2 S 4 heterojunction showed outstanding photocatalytic H -production activity resulting from S-scheme electron/hole separation and a lower -evolution barrier as evidenced by DFT calculation, in situ XPS TRPL.

Language: Английский

Citations

148
Tailor‐Engineered 2D Cocatalysts: Harnessing Electron–Hole Redox Center of 2D g‐C3N4 Photocatalysts toward Solar‐to‐Chemical Conversion and Environmental Purification DOI
Grayson Zhi Sheng Ling, Sue‐Faye Ng, Wee‐Jun Ong

et al.

Advanced Functional Materials, Journal Year: 2022, Volume and Issue: 32(29)

Published: Feb. 23, 2022

Abstract Sparked by natural photosynthesis, solar photocatalysis using metal‐free graphitic carbon nitride (g‐C 3 N 4 ) with appealing electronic structure has turned up as the most captivating technique to quest for sustainable energy generation and pollution‐free environment. Nonetheless, low‐dimensional g‐C is thwarted from sluggish kinetics rapid recombination of photogenerated carriers upon light irradiation. Among multifarious modification strategies, engineering 2D cocatalysts anticipated accelerate redox kinetics, augment active sites ameliorate electron–hole separation boosted activity thanks its face‐to‐face contact surface. It timely technological significance review 2D/2D interfaces state‐of‐the‐art cocatalysts, spanning carbon‐containing phosphorus‐containing, metal dichalcogenide, other cocatalysts. Fundamental principles each photocatalytic application will be introduced. Thereafter, recent advances cocatalyst‐mediated systems critically evaluated based on their interfacial engineering, emerging roles, impacts toward stability catalytic efficiency. Importantly, mechanistic insights into charge dynamics structure–performance relationship deciphered. Last, noteworthy research directions are prospected deliver insightful ideas future development . Overall, this serve a scaffold cornerstone in designing dimensionality‐dependent cocatalyst‐assisted renewable ecologically green

Language: Английский

Citations

140
A new breakthrough in photocatalytic hydrogen evolution by amorphous and chalcogenide enriched cocatalysts DOI
Muhammad Tayyab, Yujie Liu, Zhiguo Liu

et al.

Chemical Engineering Journal, Journal Year: 2022, Volume and Issue: 455, P. 140601 - 140601

Published: Nov. 26, 2022

Language: Английский

Citations

133
Phosphorus-enriched platinum diphosphide nanodots as a highly efficient cocatalyst for photocatalytic H2 evolution of CdS DOI

Jiachao Xu,

Wei Zhong, Duoduo Gao

et al.

Chemical Engineering Journal, Journal Year: 2022, Volume and Issue: 439, P. 135758 - 135758

Published: March 12, 2022

Language: Английский

Citations

121
Rapid Charge Transfer Endowed by Interfacial Ni‐O Bonding in S‐scheme Heterojunction for Efficient Photocatalytic H2 and Imine Production DOI
Bowen He, Peng Xiao,

Sijie Wan

et al.

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(50)

Published: Nov. 1, 2023

Cooperative coupling of H2 evolution with oxidative organic synthesis is promising in avoiding the use sacrificial agents and producing hydrogen energy value-added chemicals simultaneously. Nonetheless, photocatalytic activity obstructed by sluggish electron-hole separation limited redox potentials. Herein, Ni-doped Zn0.2 Cd0.8 S quantum dots are chosen after screening DFT simulation to couple TiO2 microspheres, forming a step-scheme heterojunction. The configuration tunes highly active site for augmented evolution, interfacial Ni-O bonds provide fast channels at atomic level lower barrier charge transfer. Also, calculations reveal an enhanced built-in electric field heterojunction superior migration separation. Kinetic analysis femtosecond transient absorption spectra demonstrates that expedited electrons first transfer Ni2+ then sites. Therefore, designed catalyst delivers drastically elevated yield (4.55 mmol g-1 h-1 ) N-benzylidenebenzylamine production rate (3.35 ). This work provides atomic-scale insights into coordinated modulation sites fields ameliorative performance.

Language: Английский

Citations

113
Enhancing photocatalytic H2O2 production with Au co-catalysts through electronic structure modification DOI Creative Commons
Xidong Zhang, Duoduo Gao, Bicheng Zhu

et al.

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: April 13, 2024

Abstract Gold-based co-catalysts are a promising class of materials with potential applications in photocatalytic H 2 O production. However, current approaches Au show limited production due to intrinsically weak adsorption at the site. We report an approach strengthen sites, and improve production, through formation electron-deficient δ+ sites by modifying electronic structure. In this case, we synthesis TiO /MoS x -Au, following selective deposition onto MoS surface which is then further anchored . that catalyst achieves significantly increased rate 30.44 mmol g −1 h -saturated solution containing ethanol. Density functional theory calculations X-ray photoelectron spectroscopy analysis reveal mediator induces thereby decreasing antibonding-orbital occupancy Au-O ads subsequently enhancing adsorption. This strategy may be useful for rationally designing structure surfaces facilitate artificial photosynthesis.

Language: Английский

Citations

110
Recent advances in quantum dot catalysts for hydrogen evolution: Synthesis, characterization, and photocatalytic application DOI Creative Commons

Haiwei Su,

Weikang Wang, Run Shi

et al.

Carbon Energy, Journal Year: 2023, Volume and Issue: 5(9)

Published: Feb. 1, 2023

Abstract Photocatalytic water splitting is beneficial for the effective mitigation of global energy and environmental crises. Owing to multi‐exciton generation, impressive light harvesting, excellent photochemical properties, quantum dot (QD)‐based catalysts reveal a considerable potential in photocatalytic hydrogen (H 2 ) production compared with bulk competitors. In this review, we summarize recent advances QDs H by enumerating different synthetic characterization strategies QDs. Various QDs‐based photocatalysts are introduced summarized categories, role varied systems, as well mechanism key factors that enhance generation performance, discussed. Finally, conclusions future perspectives exploration highly efficient innovative applications highlighted.

Language: Английский

Citations

106
Femtosecond transient absorption spectroscopy investigation into the electron transfer mechanism in photocatalysis DOI
Jianjun Zhang, Bicheng Zhu, Liuyang Zhang

et al.

Chemical Communications, Journal Year: 2022, Volume and Issue: 59(6), P. 688 - 699

Published: Dec. 21, 2022

This feature article introduces the basic principles of femtosecond transient absorption spectroscopy (fs-TAS) and recent advances in application fs-TAS to heterojunction photocatalysts.

Language: Английский

Citations

104
Verifying the Charge‐Transfer Mechanism in S‐Scheme Heterojunctions Using Femtosecond Transient Absorption Spectroscopy DOI
Chang Cheng, Jianjun Zhang, Bicheng Zhu

et al.

Angewandte Chemie, Journal Year: 2022, Volume and Issue: 135(8)

Published: Dec. 29, 2022

Abstract The S‐scheme heterojunction is flourishing in photocatalysis because it concurrently realizes separated charge carriers and sufficient redox ability. Steady‐state transfer has been confirmed by other methods. However, an essential part, the dynamics heterojunctions, still missing. To compensate, a series of cadmium sulfide/pyrene‐ alt ‐difluorinated benzothiadiazole heterojunctions were constructed photophysical processes investigated with femtosecond transient absorption spectroscopy. Encouragingly, interfacial charge‐transfer signal was detected spectra heterojunction, which provides solid evidence for to complement results from well‐established Furthermore, lifetime calculated be ca. 78.6 ps. Moreover, photocatalysts exhibit higher photocatalytic conversion 1,2‐diols H 2 production rates than bare sulfide.

Language: Английский

Citations

95