Enhanced charge transfer for efficient photocatalytic H2 evolution over UiO-66-NH2 with annealed Ti3C2Tx MXenes |
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| Affiliation: | 1. The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science & Technology, Wuhan, 430081, PR China;2. School of Chemistry and Engineering, Wuhan Institute of Technology, Wuhan, 430073, PR China;1. School of Biotechnology and Health Sciences, Wuyi University, Jiangmen, Guangdong, 529020, China;2. School of Chemistry and Chemical Engineering, Guangdong Provincial Key Lab of Green Chemical Product Technology, South China University of Technology, Guangzhou, Guangdong, 510640, China;3. School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou Guangdong, 510006, China;4. School of Materials Science and Energy Engineering, Guangdong Key Lab for Hydrogen Energy Technologies, Foshan University, Foshan, 528000, China;1. Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, PR China;2. Advanced Catalysis and Green Manufacturing Collaborative Innovation Center, Changzhou University, Changzhou 213164, PR China;3. School of Environmental and Safety Engineering, Changzhou University, Changzhou 213164, PR China;1. School of Environment and Energy, Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters (Ministry of Education), South China University of Technology, Guangzhou 510006, China;2. Guangdong Engineering and Technology Research Center for Environmental Nanomaterials, South China University of Technology, Guangzhou 510006, China;1. Physics Characterization and Simulations Lab, School of Natural Sciences (SNS), National University of Sciences and Technology (NUST), Islamabad 54000, Pakistan;2. Department of Physics, The Women University Multan, Multan 66000, Pakistan;3. Department of Electrical Engineering, NUST College of Electrical and Mechanical Engineering, National University of Sciences and Technology (NUST), Islamabad 54000, Pakistan;4. State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China;5. National Institute for Materials Science (NIMS), Tsukuba, Ibaraki 305-0047, Japan;6. Microelectronics Research Center, The University of Texas at Austin, Austin, TX 78758, United States;1. School of Chemistry and Chemical Engineering, Guangdong Provincial Key Lab of Green Chemical Product Technology, South China University of Technology, Guangzhou 510640, China;2. School of Environmental and Chemical Engineering, Foshan University, Foshan 528000, China;3. School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou 510006, China;4. Catalysis and Materials Division, Shenyang National Laboratory for Materials, Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China;5. College of Resources and Environmental Science, South-Central University for Nationalities, Wuhan 430074, China;1. School of Materials Science and Engineering, Jiangsu University, Zhenjiang, 212013, PR China;2. College of Science, Institute of Materials Physics and Chemistry, Nanjing Forestry University, Nanjing, 210037, PR China;3. State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, PR China;4. Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zürich, 8093 Zürich, Switzerland;5. Testing Center, Yangzhou University, Yangzhou 225009, PR China;6. State Key Laboratory of Photocatalysis on Energy and Environment, Fuzhou University, Fuzhou 350116, PR China;7. Key Laboratory for Photonic and Electronic Bandgap Materials, Ministry of Education, School of Physics and Electronic Engineering, Harbin Normal University, Harbin 150025, PR China |
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| Abstract: | The annealed Ti3C2Tx MXenes retained original layered morphology and gave rise to the formation of TiO2 is anticipated to achieve improved photocatalytic hydrogen evolution performance as a noble-metal-free co-catalyst. In this work, a novel Ti3C2/TiO2/UiO-66-NH2 hybrid was rationally designed for the first time by simply introducing annealed Ti3C2Tx MXenes over water-stable Zr-MOFs (UiO-66-NH2) precursors via a facile hydrothermal process. As expected, the rationally designed Ti3C2/TiO2/UiO-66-NH2 displayed significantly improvement in photocatalytic H2 performance (1980 μmol·h?1·g?1) than pristine UiO-66-NH2 under simulated sunlight irradiation. The excellent photocatalytic HER activity can be attributed to the formation of multi-interfaces in Ti3C2/TiO2/UiO-66-NH2, including Ti3C2/TiO2/UiO-66-NH2, Ti3C2/TiO2 and Ti3C2/UiO-66-NH2 interfaces, which constructed multiple pathways at the interfaces with Schottky junctions to accelerate the separation and transfer of charge carriers and endowed the accumulation of photo-generated electrons on the surface of Ti3C2. This work expanded the possibility of porous MOFs for the development of efficient photocatalytic water splitting using annealed MXenes. |
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| Keywords: | Metal-organic frameworks MXenes Photocatalysis Charge carriers transfer Schottky junction |
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