Cu-MOF assisted synthesis of CuS/CdS(H)/CdS(C): Enhanced photocatalytic hydrogen production under visible light |
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| Affiliation: | 1. Institute of Textiles and Clothing, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR, China;2. State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, No. 5 Xinmofan Road, Nanjing, 210009, China;1. Department of Chemistry, Assiut University, Assiut, 71516, Egypt;2. Advanced Multifunctional Materials Laboratory, Department of Chemistry, Assiut University, Assiut, 71516, Egypt;1. School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, PR China;2. Eco-materials and Renewable Energy Research Center (ERERC), National Laboratory of Solid State Microstructures, Kunshan Innovation Institute of Nanjing University, Jiangsu Key Laboratory for Nanotechnology, Nanjing University, Nanjing 210023, PR China;1. Key Laboratory of Oil & Gas Fine Chemicals Ministry of Education, Xinjiang University, Urumqi 830046, Xinjiang, People''s Republic of China;2. Department of Chemistry and Centre for Pharmacy, University of Bergen, Bergen 5007, Norway;1. State Key Laboratory of Pollution Control and Resource Reuse, Shanghai Institute of Pollution Control and Ecological Security, School of Environmental Science and Engineering, Tongji University, Shanghai 200092, China;2. School of Chemical Science and Engineering, Tongji University, Shanghai 200092, China;3. International Joint Research Center for Sustainable Urban Water System, Shanghai 200092, China;1. School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, Jiangsu, PR China;2. International Research Center for Renewable Energy, State Key Laboratory of Multiphase Flow in Power Engineering, Xi''an Jiaotong University, Xi''an, Shaanxi 710049, PR China;3. Jiangsu Key Laboratory for Biomass Energy and Material, Jiangsu Province, Nanjing 210042, PR China;4. Jiangsu Province Hi-Tech Key Laboratory for Bio-medical Research, Southeast University, Nanjing 211189, PR China |
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| Abstract: | CuS/CdS(H)/CdS(C) photocatalysts were synthesized via the hydrothermal method by employing thiourea, Cd(CH3COO)2·3H2O and copper 1,4-benzenedicarboxylate MOF (CuBDC). The photocatalysts were characterized by XRD, XPS, BET, TEM and UV–vis diffuse reflectance spectra. Interestingly, hexagonal CdS (CdS(H)) and cubic CdS (CdS(C)) were formed with phase junctions in one step when CuBDC was introduced in the synthesis process, in addition, CuS nanoparticles were deposited on CdS. However, only hexagonal CdS was obtained without CuBDC. It demonstrated that CuBDC was not only the precursor of CuS but also the structural modifier for CdS. With the reduction of re-combination of photo-induced electrons and holes caused by phase junctions and the enhancement of visible-light absorptions due to the loading of CuS, all CuS/CdS(H)/CdS(C) photocatalysts had higher photocurrent densities under visible-light irradiation, and consequently the higher rates of H2 production than pure CdS(H). Typically, the catalyst with 2.89 wt% of Cu showed a highest rate of H2 evolution at 2042 μmol/g/h. |
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| Keywords: | CdS Phase junction CuS Cu-MOF |
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