Increasing electron transfer and light absorption in graphited nanocarbon-conjugated g-C3N4 nanosheet heterostructure for photocatalytic hydrogen evolution |
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| Affiliation: | 1. School of Environment and Civil Engineering, Dongguan University of Technology, Dongguan, Guangdong Province, 523808, China;2. Hefei National Research Center for Physical Sciences at the Microscale, Anhui Laboratory of Advanced Photon Science and Technology, CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, IChEM, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui Province, 230026, China;3. School of Materials Science and Engineering, Anhui University, Hefei 230601, Anhui, China;1. Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati, 781039, Assam, India;2. Center for Nanotechnology, Indian Institute of Technology Guwahati, Guwahati, 781039, Assam, India;1. China University of Petroleum (East China), College of Pipeline and Civil Engineering, Qingdao, 266580, China;2. Shandong Provincial Key Laboratory of Oil and Gas Storage and Transportation Safety, Qingdao, 266580, China;3. College of Engineering Science, University of Chinese Academy of Sciences, Beijing, 100049, China;4. Institute of Porous Flow & Fluid Mechanics, Chinese Academy of Sciences, Langfang, 065007, China;1. Key Laboratory of Magnetic Molecules & Magnetic Information Materials Ministry of Education, and the School of Chemical and Material Science, Shanxi Normal University, Taiyuan, 030031, China;1. College of Mechanical & Electrical Engineering, Shaanxi University of Science & Technology, Xi''an, Shaanxi, 710021, China;2. Shaanxi Key Laboratory of Industrial Automation, Shaanxi University of Technology, Hanzhong, Shaanxi, 723001, China |
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| Abstract: | Accelerating the charge separation and transfer as well as increasing the visible light absorption is of great importance for photocatalysts to realize efficient photocatalytic hydrogen evolution via water splitting. Herein, for the first time, we fabricated in-plane graphited nanocarbon-conjugated polymeric carbon nitride (GNC-C3N4) nanosheet heterostructure photocatalyst from melamine and hexaketocyclohexane octahydrate mixture via an amino-carbonyl reaction. The incorporation of GNC into conjugate network of C3N4 can not only dramatically enhance the light harvesting but also significantly promote the charge separation and transfer by the built-in electric field and intimate interface in the coplanar GNC-C3N4 heterostructure. Accordingly, the optimal GNC-C3N4 photocatalyst demonstrates a more than 15-fold enhancement for photocatalytic hydrogen evolution from water under visible light irradiation, compared to C3N4. |
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| Keywords: | Photocatalysis Carbon nitride Heterostructure Charge separation Water splitting Hydrogen |
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