Fabrication of alveolate g-C3N4 with nitrogen vacancies via cobalt introduction for efficient photocatalytic hydrogen evolution |
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| Affiliation: | 1. State Key Laboratory of Metastable Materials Science & Technology, Yanshan University, Qinhuangdao, 066004, PR China;2. Hebei Key Laboratory of Applied Chemistry, Hebei Key Laboratory of Heavy Metal Deep-Remediation in Water and Resource Reuse, School of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao 066004, PR China;1. Key Laboratory of Jiangxi Province for Environment and Energy Catalysis, The College of Chemistry, Nanchang University, Nanchang 330031, Jiangxi, China;2. College of Chemistry and Environmental Science, Shangrao Normal University, Shangrao 334001, Jiangxi, China;3. Jiangxi Energy Sales Co., Ltd, Nanchang 330031, Jiangxi, China;1. Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing 210098, China;2. College of Mechanics and Materials, Hohai University, Nanjing 210098, China;1. Department of Physics and Nanotechnology, SRM Institute of Science and Technology, Kattankulathur, Chennai, 603203, Tamil Nadu, India;2. SRM Research Institute, SRM Institute of Science and Technology, Kattankulathur, Chennai, 603203, Tamil Nadu, India;3. Department of Electronics and Communication Engineering, Indian Institute of Information Technology Design and Manufacturing, Chennai 600127, India |
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| Abstract: | Photocatalytic hydrogen evolution is a promising method for converting solar energy into chemical energy. Herein, on the basis of graphitic carbon nitride (g-C3N4) material with alveolate structure prepared via the hard template method, transition-metal cobalt oxide nanoparticles were reasonably introduced, and a highly efficient cobalt oxide composite alveolate g-C3N4 (ACN) photocatalyst was successfully prepared. A series of test methods were used to characterize the structural properties of the prepared samples systematically, and the photocatalytic activity of the catalysts in photocatalytic hydrogen evolution was explored. The composite materials have excellent photocatalytic performance mainly because the synergistic effect of the alveolate structure of ACN provides multiple scattering effects; nitrogen vacancies serves as the centers of photogenerated carrier separation; and cobalt oxides accelerates electron transfer. This study provides a new idea for the design of g–C3N4–based photocatalysts with wide light responses and simple structures. |
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| Keywords: | Cobalt doping Nitrogen vacancies Hydrogen evolution Photocatalysis |
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