Zinc phthalocyanine sensitized g-C3N4 photocatalyst for exceptional photocatalytic hydrogen evolution and pollutant degradation |
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| Affiliation: | 1. School of Optical and Electronic Information and Engineering Research Centre & Wuhan National Lab for Optoelectronics & Optical Valley Laboratory, Huazhong University of Science and Technology, Wuhan, 430074, China;2. Shenzhen Huazhong University of Science and Technology Research Institute, Shenzhen 518000, PR China;3. Department of Chemistry, Abdul Wali Khan University, Mardan, Khyber Pakhtunkhwa, 23200, Pakistan;4. School of Physics, University of Electronic Science and Technology of China, Chengdu 610054, China;5. Middle East Technical University (METU) Ankara, Turkey;6. School of Materials Science and Engineering, Northwestern Polytechnical University, Xian, 710072, PR China;7. Department of Chemistry, University of Karachi, Karachi, 75270, Pakistan;8. Department of Chemistry, Kohat University of Science and Technology, Kohat, Pakistan;1. National Engineering Research Centre of Electric Vehicles, Beijing Institute of Technology, Beijing, 100081, China;2. Yangtze Delta Region Academy of Beijing Institute of Technology, Jiaxing, 314019, PR China;1. School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China;2. Key Laboratory of New Low-carbon Green Chemical Technology, Education Department of Guangxi Zhuang Autonomous Region, Nanning 530004, China;1. Center of Excellence for Energy and Environmental Studies, Deenbandhu Chhotu Ram University of Science and Technology, Murthal 131039, India;2. Department of Biomedical Engineering, Deenbandhu Chhotu Ram University of Science and Technology, Murthal 131039, India;3. Academy of Scientific and Innovative Research (AcSIR), Ghaziabad- 201002, India;4. Materials Science and Sensor Application, Central Scientific Instruments Organisation, Chandigarh-160030, India;5. Department of Physics, School of Engineering & Technology (SoET), Central University of Haryana, Mahendragarh 123031, India |
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| Abstract: | Here in this manuscript, the high charge conductivity and exceptionally wide range soalr light absorption of metal phthalocyanines were followed for boosted photocatalysis. Graphitic carbon nitride, g-C3N4 (CN) was thermally prepared from melamine and loaded with appropriate amount of zinc phthalocyanine (ZnPc) to form ZPCN nanocomposites. The fabricated samples were used to liberate hydrogen from water and decompose 2,4-dichlorphenol (2,4-DCP) pollutant under visible-light irradiation. The optimized nanocomposite (0.5ZPCN) purchased highly accelerated photocatalysis and liberated 90 μmol H2 in 1 h in the presence of methanol as sacrificial agent. The same nanocomposite also showed 85% decomposition efficiency for the degradation of 2,4-DCP pollutant. These enhanced catalytic activity of g-C3N4 functionalized with ZnPc are attributed to the exceptional visible light absorption and effective generation of super oxide ions and holes formed after charge transfer between g-C3N4 and ZnPc as confirmed from photoluminescence, fluorescent and electrochemical characterization of the nanophotocatalysts. The charge/radical trapping experiments confirmed that super oxide anions were the main oxidizing agents in the decomposition of 2,4-DCP. |
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| Keywords: | Zinc phthalocyanine 2,4-DCP degradation Super oxide anions Charge separation |
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