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Enhancing photocatalytic activity of C60-based photocatalyst for visible-light-driven hydrogen evolution with the coupling of Fe3O4 microbead to modulate charge separation efficiency. CATAL COMMUN 2022. [DOI: 10.1016/j.catcom.2022.106514] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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ZnS/g-C3N4 heterojunction with Zn-vacancy for efficient hydrogen evolution in water splitting driven by visible light. CATAL COMMUN 2022. [DOI: 10.1016/j.catcom.2022.106422] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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Gopakumar A, Ren P, Chen J, Manzolli Rodrigues BV, Vincent Ching HY, Jaworski A, Doorslaer SV, Rokicińska A, Kuśtrowski P, Barcaro G, Monti S, Slabon A, Das S. Lignin-Supported Heterogeneous Photocatalyst for the Direct Generation of H 2O 2 from Seawater. J Am Chem Soc 2022; 144:2603-2613. [PMID: 35129333 DOI: 10.1021/jacs.1c10786] [Citation(s) in RCA: 25] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
The development of smart and sustainable photocatalysts is in high priority for the synthesis of H2O2 because the global demand for H2O2 is sharply rising. Currently, the global market share for H2O2 is around 4 billion US$ and is expected to grow by about 5.2 billion US$ by 2026. Traditional synthesis of H2O2 via the anthraquinone method is associated with the generation of substantial chemical waste as well as the requirement of a high energy input. In this respect, the oxidative transformation of pure water is a sustainable solution to meet the global demand. In fact, several photocatalysts have been developed to achieve this chemistry. However, 97% of the water on our planet is seawater, and it contains 3.0-5.0% of salts. The presence of salts in water deactivates the existing photocatalysts, and therefore, the existing photocatalysts have rarely shown reactivity toward seawater. Considering this, a sustainable heterogeneous photocatalyst, derived from hydrolysis lignin, has been developed, showing an excellent reactivity toward generating H2O2 directly from seawater under air. In fact, in the presence of this catalyst, we have been able to achieve 4085 μM of H2O2. Expediently, the catalyst has shown longer durability and can be recycled more than five times to generate H2O2 from seawater. Finally, full characterizations of this smart photocatalyst and a detailed mechanism have been proposed on the basis of the experimental evidence and multiscale/level calculations.
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Affiliation(s)
- Aswin Gopakumar
- Department of Chemistry, Universiteit Antwerpen, Antwerp 2020, Belgium
| | - Peng Ren
- Department of Chemistry, Universiteit Antwerpen, Antwerp 2020, Belgium
| | - Jianhong Chen
- Department of Materials and Environmental Chemistry, Stockholm University, Stockholm 10691, Sweden
| | | | - H Y Vincent Ching
- Department of Chemistry, Universiteit Antwerpen, Wilrijk 2610, Belgium
| | - Aleksander Jaworski
- Department of Materials and Environmental Chemistry, Stockholm University, Stockholm 10691, Sweden
| | | | - Anna Rokicińska
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, Kraków 30-387, Poland
| | - Piotr Kuśtrowski
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, Kraków 30-387, Poland
| | - Giovanni Barcaro
- CNR-IPCF, Institute for Chemical and Physical Processes, Area della Ricerca, via Moruzzi 1, Pisa I-56124, Italy
| | - Susanna Monti
- CNR-ICCOM, Institute of Chemistry of Organometallic Compounds, Area della Ricerca, via Moruzzi 1, Pisa I-56124, Italy
| | - Adam Slabon
- Department of Materials and Environmental Chemistry, Stockholm University, Stockholm 10691, Sweden
| | - Shoubhik Das
- Department of Chemistry, Universiteit Antwerpen, Antwerp 2020, Belgium
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Wu Q, Cao J, Wang X, Liu Y, Zhao Y, Wang H, Liu Y, Huang H, Liao F, Shao M, Kang Z. A metal-free photocatalyst for highly efficient hydrogen peroxide photoproduction in real seawater. Nat Commun 2021; 12:483. [PMID: 33473132 PMCID: PMC7817682 DOI: 10.1038/s41467-020-20823-8] [Citation(s) in RCA: 81] [Impact Index Per Article: 27.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2020] [Accepted: 12/22/2020] [Indexed: 12/15/2022] Open
Abstract
Artificial photosynthesis of H2O2 from H2O and O2, as a spotless method, has aroused widespread interest. Up to date, most photocatalysts still suffer from serious salt-deactivated effects with huge consumption of photogenerated charges, which severely limit their wide application. Herein, by using a phenolic condensation approach, carbon dots, organic dye molecule procyanidins and 4-methoxybenzaldehyde are composed into a metal-free photocatalyst for the photosynthetic production of H2O2 in seawater. This catalyst exhibits high photocatalytic ability to produce H2O2 with the yield of 1776 μmol g-1h-1 (λ ≥ 420 nm; 34.8 mW cm-2) in real seawater, about 4.8 times higher than the pure polymer. Combining with in-situ photoelectrochemical and transient photovoltage analysis, the active site and the catalytic mechanism of this composite catalyst in seawater are also clearly clarified. This work opens up an avenue for a highly efficient and practical, available catalyst for H2O2 photoproduction in real seawater.
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Affiliation(s)
- Qingyao Wu
- Institute of Functional Nano and Soft Materials Laboratory (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, 215123, Suzhou, PR China
| | - Jingjing Cao
- Institute of Functional Nano and Soft Materials Laboratory (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, 215123, Suzhou, PR China
| | - Xiao Wang
- Institute of Functional Nano and Soft Materials Laboratory (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, 215123, Suzhou, PR China
| | - Yan Liu
- Institute of Functional Nano and Soft Materials Laboratory (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, 215123, Suzhou, PR China
| | - Yajie Zhao
- Institute of Functional Nano and Soft Materials Laboratory (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, 215123, Suzhou, PR China
| | - Hui Wang
- Institute of Functional Nano and Soft Materials Laboratory (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, 215123, Suzhou, PR China
| | - Yang Liu
- Institute of Functional Nano and Soft Materials Laboratory (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, 215123, Suzhou, PR China.
| | - Hui Huang
- Institute of Functional Nano and Soft Materials Laboratory (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, 215123, Suzhou, PR China
| | - Fan Liao
- Institute of Functional Nano and Soft Materials Laboratory (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, 215123, Suzhou, PR China
| | - Mingwang Shao
- Institute of Functional Nano and Soft Materials Laboratory (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, 215123, Suzhou, PR China.
| | - Zhenghui Kang
- Institute of Functional Nano and Soft Materials Laboratory (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, 215123, Suzhou, PR China.
- Macao Institute of Materials Science and Engineering, Macau University of Science and Technology, Taipa, 999078, Macau SAR, China.
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