The heterojunction construction of hybrid B-doped g-C3N4 nanosheets and ZIF67 by simple mechanical grinding for improved photocatalytic hydrogen evolution |
| |
| Affiliation: | 1. School of Transportation and Vehicle Engineering, Shandong University of Technology, Zibo, 255000, China;2. State Key Laboratory of Engines, Tianjin University, Tianjin, 3000072, China;1. Institute of Modern Physics, Fudan University, Shanghai, 200433, China;2. Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang, 621900, China;1. Department of Physics, University School of Sciences, Gujarat University, Ahmedabad, 380 009, India;2. Computational Materials and Nanoscience Group, Department of Physics and Electronics, St. Xavier''s College, Ahmedabad, 380 009, India;3. Institute of Electronic Structure and Laser, FORTH, PO Box 1527, 71110 Heraklio, Crete, Greece;4. Conn Center for Renewable Energy Research, University of Louisville, Louisville, KY 40292, USA;1. Nanjing Institute of Future Energy System, Nanjing 211135, China;2. Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, China;3. School of Energy and Mechanical Engineering, Nanjing Normal University, Nanjing 210042, China;4. University of Chinese Academy of Sciences, Nanjing 211135, China;5. Innovation Academy for Light-duty Gas Turbine, Chinese Academy of Sciences, Beijing 100190, China;1. School of Mechanical Engineering, Tianjin University, No. 135 Yaguan Road, Tianjin Haihe Education Park, Tianjin, 300350, China;2. Key Laboratory of Efficient Utilization of Low and Medium Grade Energy (Tianjin University), Ministry of Education, China |
| |
| Abstract: | In this study, B-doped g-C3N4 nanosheets (BCN) were prepared using a thermal-oxidative etching method, resulting in a semiconductor with a large specific surface area. The B-doping enhances the light absorption of graphitic carbon nitride(g-C3N4) and improves the photogenerated carrier lifetime. The optimal B-containing amount resuled in a hydrogen production rate of 1297 μmol g?1 h?1 for g-C3N4 nanosheets. Furthermore, zeolitic imidazolate framework (ZIF)67/BCN heterostructures were successfully obtained through simple mechanical grinding approaches. The BCN provided abundant active sites and contributed to excellent encapsulation on the surface of ZIF67. The obtained ZIF67/BCN photocatalyst displayed an H2 evolution rate of 3392 μmol g?1 h?1, attributed to forming type-II heterojunctions between ZIF67 and BCN. Moreover, the BCN exhibited a higher conduction band (CB) potential with ZIF67 than CN, resulting in more efficient light-driven charge separation between ZIF67 and BCN and enhanced photocatalytic performance. This work provides a meaningful reference for improving the activity of g-C3N4 photocatalysts. |
| |
| Keywords: | B-doping ZIF67 Hydrogen production Type-II heterojunction |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
