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Baghdadi Y, Daboczi M, Temerov F, Yang M, Cui J, Eslava S. A g-C 3N 4/rGO/Cs 3Bi 2Br 9 mediated Z-scheme heterojunction for enhanced photocatalytic CO 2 reduction. JOURNAL OF MATERIALS CHEMISTRY. A 2024; 12:16383-16395. [PMID: 38988703 PMCID: PMC11232668 DOI: 10.1039/d4ta01857e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/19/2024] [Accepted: 05/16/2024] [Indexed: 07/12/2024]
Abstract
Photocatalytic CO2 reduction plays a crucial role in advancing solar fuels, and enhancing the efficiency of the chosen photocatalysts is essential for sustainable energy production. This study demonstrates advancements in the performance of g-C3N4 as a photocatalyst achieved through surface modifications such as exfoliation to increase surface area and surface oxidation for improved charge separation. We also introduce reduced graphene oxide (rGO) in various ratios to both bulk and exfoliated g-C3N4, which effectively mitigates charge recombination and establishes an optimal ratio for enhanced efficiency. g-C3N4/rGO serves to fabricate a hybrid organic/inorganic heterojunction with Cs3Bi2Br9, resulting in a g-C3N4/rGO/Cs3Bi2Br9 composite. This leads to a remarkable increase in photocatalytic conversion of CO2 and H2O to CO, H2 and CH4 at rates of 54.3 (±2.0) μmole- g-1 h-1, surpassing that of pure Cs3Bi2Br9 (11.2 ± 0.4 μmole- g-1 h-1) and bulk g-C3N4 (5.5 ± 0.5 μmole- g-1 h-1). The experimentally determined energy diagram indicates that rGO acts as a solid redox mediator between g-C3N4 and Cs3Bi2Br9 in a Z-scheme heterojunction configuration, ensuring that the semiconductor (Cs3Bi2Br9) with the shallowest conduction band drives the reduction and the one with the deepest valence band (g-C3N4) drives the oxidation. The successful formation of this high-performance heterojunction underscores the potential of the developed composite as a photocatalyst for CO2 reduction, offering promising prospects for advancing the field of solar fuels and achieving sustainable energy goals.
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Affiliation(s)
- Yasmine Baghdadi
- Department of Chemical Engineering and Centre for Processable Electronics, Imperial College London London SW7 2AZ UK
| | - Matyas Daboczi
- Department of Chemical Engineering and Centre for Processable Electronics, Imperial College London London SW7 2AZ UK
| | - Filipp Temerov
- Department of Chemical Engineering and Centre for Processable Electronics, Imperial College London London SW7 2AZ UK
- Nano and Molecular System (NANOMO) Research Unit, University of Oulu Oulu 90570 Finland
| | - Mengya Yang
- Department of Chemical Engineering and Centre for Processable Electronics, Imperial College London London SW7 2AZ UK
| | - Junyi Cui
- Department of Chemical Engineering and Centre for Processable Electronics, Imperial College London London SW7 2AZ UK
| | - Salvador Eslava
- Department of Chemical Engineering and Centre for Processable Electronics, Imperial College London London SW7 2AZ UK
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Fan S, Yang Q, Yin G, Qi X, Feng Y, Ding J, Peng Q, Qu Y, Wang Q, Shen Y, Wang M, Gong X. All-Inorganic Perovskite NiTiO 3/Cs 3Sb 2I 9 Heterostructure for Photocatalytic CO 2 Reduction to CH 4 with High Selectivity. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2311978. [PMID: 38361184 DOI: 10.1002/smll.202311978] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Revised: 01/23/2024] [Indexed: 02/17/2024]
Abstract
Developing efficient and stable halide perovskite-based photocatalysts for highly selectivity reduction CO2 to valuable fuels remains a significant challenge due to their intrinsic instability. Herein, a novel heterostructure featuring 2D Cs3Sb2I9 nanosheets on a 3D flower-like mesoporous NiTiO3 framework using a top-down stepwise membrane fabrication technique is constructed. The unique bilayer heterostructure formed on the 3D mesoporous framework endowed NiTiO3/Cs3Sb2I9 with sufficient and close interface contact, minimizing charge transport distance, and effectively promoting the charge transfer at the interface, thus improving the reaction efficiency of the catalyst surface. As revealed by characterization and calculation, the coupling of Cs3Sb2I9 with NiTiO3 facilitates the hydrogenation process during catalytic, directing reaction intermediates toward highly selective CH4 production. Furthermore, the van der Waals forces inherent in the 3D/2D heterostructure with face-to-face contact provide superior stability, ensuring the efficient realization of photocatalytic CO2 reduction to CH4. Consequently, the optimized 3D/2D NiTiO3/Cs3Sb2I9 heterostructure demonstrates an impressive CH4 yield of 43.4 µmol g-1 h-1 with a selectivity of up to 88.6%, surpassing most reported perovskite-based photocatalysts to date. This investigation contributes to overcoming the challenges of commercializing perovskite-based photocatalysts and paves the way for the development of sustainable and efficient CO2 conversion technologies.
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Affiliation(s)
- Shuhan Fan
- College of Physics, & Guizhou Province Key Laboratory for Photoelectrics Technology and Application, Guizhou University, Guiyang, 550025, China
| | - Qu Yang
- College of Physics, & Guizhou Province Key Laboratory for Photoelectrics Technology and Application, Guizhou University, Guiyang, 550025, China
| | - Guilin Yin
- College of Physics, & Guizhou Province Key Laboratory for Photoelectrics Technology and Application, Guizhou University, Guiyang, 550025, China
| | - Xiaosi Qi
- College of Physics, & Guizhou Province Key Laboratory for Photoelectrics Technology and Application, Guizhou University, Guiyang, 550025, China
| | - Yuyu Feng
- College of Physics, & Guizhou Province Key Laboratory for Photoelectrics Technology and Application, Guizhou University, Guiyang, 550025, China
| | - Junfei Ding
- College of Physics, & Guizhou Province Key Laboratory for Photoelectrics Technology and Application, Guizhou University, Guiyang, 550025, China
| | - Qiong Peng
- College of Physics, & Guizhou Province Key Laboratory for Photoelectrics Technology and Application, Guizhou University, Guiyang, 550025, China
| | - Yunpeng Qu
- College of Physics, & Guizhou Province Key Laboratory for Photoelectrics Technology and Application, Guizhou University, Guiyang, 550025, China
| | - Qinglong Wang
- State Key Laboratory of Catalysis, Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China
| | - Yan Shen
- Wuhan National Laboratory for Optoelectronics, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, Hubei, 430074, China
| | - Mingkui Wang
- Wuhan National Laboratory for Optoelectronics, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, Hubei, 430074, China
| | - Xiu Gong
- College of Physics, & Guizhou Province Key Laboratory for Photoelectrics Technology and Application, Guizhou University, Guiyang, 550025, China
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Baghdadi Y, Temerov F, Cui J, Daboczi M, Rattner E, Sena MS, Itskou I, Eslava S. Cs 3Bi 2Br 9/g-C 3N 4 Direct Z-Scheme Heterojunction for Enhanced Photocatalytic Reduction of CO 2 to CO. CHEMISTRY OF MATERIALS : A PUBLICATION OF THE AMERICAN CHEMICAL SOCIETY 2023; 35:8607-8620. [PMID: 37901142 PMCID: PMC10601477 DOI: 10.1021/acs.chemmater.3c01635] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Revised: 09/28/2023] [Indexed: 10/31/2023]
Abstract
Lead-free halide perovskite derivative Cs3Bi2Br9 has recently been found to possess optoelectronic properties suitable for photocatalytic CO2 reduction reactions to CO. However, further work needs to be performed to boost charge separation for improving the overall efficiency of the photocatalyst. This report demonstrates the synthesis of a hybrid inorganic/organic heterojunction between Cs3Bi2Br9 and g-C3N4 at different ratios, achieved by growing Cs3Bi2Br9 crystals on the surface of g-C3N4 using a straightforward antisolvent crystallization method. The synthesized powders showed enhanced gas-phase photocatalytic CO2 reduction in the absence of hole scavengers of 14.22 (±1.24) μmol CO g-1 h-1 with 40 wt % Cs3Bi2Br9 compared with 1.89 (±0.72) and 5.58 (±0.14) μmol CO g-1 h-1 for pure g-C3N4 and Cs3Bi2Br9, respectively. Photoelectrochemical measurements also showed enhanced photocurrent in the 40 wt % Cs3Bi2Br9 composite, demonstrating enhanced charge separation. In addition, stability tests demonstrated structural stability upon the formation of a heterojunction, even after 15 h of illumination. Band structure alignment and selective metal deposition studies indicated the formation of a direct Z-scheme heterojunction between the two semiconductors, which boosted charge separation. These findings support the potential of hybrid organic/inorganic g-C3N4/Cs3Bi2Br9 Z-scheme photocatalyst for enhanced CO2 photocatalytic activity and improved stability.
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Affiliation(s)
- Yasmine Baghdadi
- Department
of Chemical Engineering and Centre for Processable Electronics, Imperial College London, London SW7 2AZ, United Kingdom
| | - Filipp Temerov
- Department
of Chemical Engineering and Centre for Processable Electronics, Imperial College London, London SW7 2AZ, United Kingdom
- Nano
and molecular system (NANOMO) research unit, University of Oulu, Oulu 90570, Finland
| | - Junyi Cui
- Department
of Chemical Engineering and Centre for Processable Electronics, Imperial College London, London SW7 2AZ, United Kingdom
| | - Matyas Daboczi
- Department
of Chemical Engineering and Centre for Processable Electronics, Imperial College London, London SW7 2AZ, United Kingdom
| | - Eduardo Rattner
- Department
of Chemical Engineering and Centre for Processable Electronics, Imperial College London, London SW7 2AZ, United Kingdom
| | - Michael Segundo Sena
- Department
of Chemical Engineering and Centre for Processable Electronics, Imperial College London, London SW7 2AZ, United Kingdom
- Department
of Graduation in Chemical Engineering, Universidade
Federal do Rio Grande do Norte/UFRN, 59.078-970 Rio Grande do Norte, Brazil
| | - Ioanna Itskou
- Barrer
Centre, Department of Chemical Engineering, Imperial College London, London SW7 2AZ, United
Kingdom
| | - Salvador Eslava
- Department
of Chemical Engineering and Centre for Processable Electronics, Imperial College London, London SW7 2AZ, United Kingdom
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