Journal
MATERIALS CHARACTERIZATION
Volume 139, Issue -, Pages 89-99Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.matchar.2018.02.036
Keywords
Porous structure; Pre-polymerization; Hydrogen evolution; Graphitic carbon nitride; Photocatalysis
Categories
Funding
- National Nature Science Foundation [51672220]
- 111 Program of MOE [B08040]
- National Defense Science Foundation [32102060303]
- Xi'an Science and Technology Foundation [CXY1706-5, 2017086CGRC049-XBGY005]
- Shaanxi Provincial Science Foundation [2017KW-018]
- NPU Seed Foundation of Innovation and Creation for Graduate Students [Z2018007]
- NPU Gaofeng Project of China [17GH020824]
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A facile and green method was developed to fabricate porous graphitic carbon nitride (g-C3N4) nanosheets by simply pre-polymerizing melamine at 350 degrees C for 2 h. A porous structure was formed in the resulted g-C3N4 (CN-350). Consequently, the specific surface area and pore volume of CN-350 was greatly enhanced, resulting in superior performance in photocatalytic hydrogen evolution and dye degradation. The hydrogen evolution rate and degradation constant of CN-350 were 11.2 and 8.8 times higher than that of bulk g-C3N4 under visible light irradiation. The porous structure not only provided CN-350 with abundant active catalytic sites and cross-plane diffusion channels to facilitate the charge and mass transportation, but also promoted the charge separation in the photocatalytic reaction. This work provided a promising method for mass-production of highly active and stable g-C3N4-based photocatalysts for environmental and energetic applications.
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