Dual-functional photocatalysis boosted by electrostatic assembly of porphyrinic metal-organic framework heterojunction composites with CdS quantum dots |
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| Affiliation: | 1. Liaoning & Shenyang Key Laboratory of Functional Dye and Pigment, Shenyang University of Chemical Technology, Shenyang 110142, China;2. Department of Cell Biology, China Medical University, Shenyang 110122, China;3. State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 110624, China;4. Department of Chemistry, Graduate School of Science, Hiroshima University, Higashi-Hiroshima 7398526, Japan;1. School of Petrochemical Engineering, Changzhou University, Changzhou 213164, China;2. Department of Chemistry, Maynooth University, National University of Ireland, Maynooth, Co. Kildare, Ireland;3. State Key Laboratory of Analytical Chemistry for Life Science, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China;1. Key Laboratory of Tropical Translational Medicine of Ministry of Education, NHC Key Laboratory of Control of Tropical Diseases, School of Tropical Medicine, Micronano Technology Research Institute, School of Basic Medicine and Life Sciences, Hainan Medical University, Haikou 571199, China;2. Beadstar Biotechnology Hainan Province Co., Ltd., Haikou 570110, China;3. State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China;4. Economical Forest Cultivation and Utilization of 2011 Collaborative Innovation Center in Hunan Province, Hunan Key Laboratory of Biomedical Nanomaterials and Devices, Hunan University of Technology, Zhuzhou 412007, China;1. Changsha Medical University, Academician Workstation, Changsha 410219, China;2. Xiangya School of Pharmaceutical Sciences, Central South University, Changsha 410013, China;3. State Key Laboratory of Toxicology and Medical Countermeasures, Institute of Pharmacology and Toxicology, Beijing 100850, China;4. Key Laboratory of Biological Nanotechnology of National Health Commission, Changsha 410000, China;1. State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China;2. Hubei Key Laboratory of Low Dimensional Optoelectronic Materials and Devices, Hubei University of Arts and Science, Xiangyang 441053, China;3. Hubei Institute of Aerospace Chemotechnology, Xiangyang 441003, China;4. Hubei Longzhong Laboratory, Xiangyang 441000, China |
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| Abstract: | Photocatalytic dual-functional reaction under visible light irradiation represents a sustainable development strategy. In detail, H2 production coupled with benzylamine oxidation can remarkably lower the cost by replacing sacrificial agents. In this work, CdS quantum dots (CdS QDs) were successfully loaded onto the surface of a porphyrinic metal-organic framework (Pd-PCN-222) by the electrostatic self-assembly at room temperature. The consequent Pd-PCN-222/CdS heterojunction composites displayed superb photocatalytic activity under visible light irradiation, achieving a H2 production and benzylamine oxidation rate of 5069 and 3717 µmol g−1 h−1 with >99% selectivity in 3 h. There is no noticeable loss of catalytic capability during three successive runs. Mechanistic studies by in situ electron spin resonance and X-ray photoelectron spectroscopy disclosed that CdS QDs injected photoexcited electrons to Pd-PCN-222 and then Zr6 clusters under visible-light irradiation, and thus CdS QDs and Zr6 clusters behave as the photocatalytic oxidation and reduction centers, respectively. |
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