Plasmon-resonance-enhanced visible-light photocatalytic activity of Ag quantum dots/TiO2 microspheres for methyl orange degradation |
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| Institution: | 1. Key Laboratory of Microsystems and Microstructures Manufacturing, Ministry of Education, Harbin Institute of Technology, Harbin 150001, China;2. Academy of Fundamental and Interdisciplinary Sciences, Harbin Institute of Technology, Harbin 150001, China;3. School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China;4. School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, China;5. Key Laboratory for Photochemical Biomaterials and Energy Storage Materials, Heilongjiang Province and College of Chemistry and Chemical Engineering, Harbin Normal University, Harbin 150025, China;1. PG & Research Department of Physics, Government Arts College, Melur, Madurai, 625 106, Tamil Nadu, India;2. Department of Chemistry, Sidharth College, Badlapur, University of Mumbai, Maharashtra, India;3. Department of Physics, Centre for Materials Science, Faculty of Engineering, Karpagam Academy of Higher Education, Coimbatore, 641 021, Tamil Nadu, India;1. Department of Chemical Engineering, Abadan Faculty of Petroleum Engineering, Petroleum University of Technology, Abadan, Iran;2. Department of Environmental Health Engineering, School of Health, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran;1. Institute of Solid State Chemistry, Russian Academy of Sciences, Ekaterinburg, 620990, Russian Federation;2. Research Institute of Physics and Applied Mathematics, Ural Federal University, Lenin Av. 51, Ekaterinburg, 620000, Russian Federation;1. Nano Catalysis and Solar Fuels Research Laboratory, Department of Materials Science & Nanotechnology, Yogi Vemana University, Vemanapuram, Kadapa 516003, Andhra Pradesh, India;2. Inorganic and Physical Chemistry Division, Indian Institute of Chemical Technology (CSIR-IICT), Hyderabad 500007, Telangana, India |
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| Abstract: | We successfully prepared Ag quantum dots modified TiO2 microspheres by facile solvothermal and calcination method. The as-prepared Ag quantum dots/TiO2 microspheres were characterized by scanning electron microscope, transmission electron microscope, X-ray diffraction, X-ray photoelectron spectroscopy and UV-vis diffuse reflectance spectroscopy. The Ag quantum dots/TiO2 photocatalyst showed excellent visible light absorption and efficient photocatalytic activity for methyl orange degradation. And the sample with the molar ratio of 0.05 (Ag to Ti) showed the best visible light photocatalytic activity for methyl orange degradation, mainly because of the surface plasmon resonance (SPR) effects of Ag quantum dots to generate electron and hole pairs for enhanced visible light photocatalysis. Finally, possible visible light photocatalytic mechanism of Ag quantum dots/TiO2 microspheres for methyl orange degradation was proposed in detail. |
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| Keywords: | Photocatalyst Surface plasmon resonance Visible-light photocatalysis Methyl orange |
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