Journal
ACS APPLIED NANO MATERIALS
Volume 1, Issue 12, Pages 6733-6741Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsanm.8b01528
Keywords
g-C3N4 nanosheets; rapid cooling; layer contraction force; photogenerated electrons; photocatalysis
Funding
- National Natural Science Foundation of China [51872056, 51672055]
- Ten Thousand Talent Program
- Natural Science Foundation of Heilongjiang Province [LC2016017]
- Fundamental Research funds for the Central Universities [HEUCF201802]
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Wrinkled ultrathin graphitic C3N4 nanosheets (U-g-C3N4) have been successfully synthesized via a thermal condensation process and subsequent rapid cooling treatment in liquid nitrogen. The layer contraction force caused by the rapid cooling process can break the van der Waals forces between the interlayers, thus successfully exfoliating the bulk g-C3N4. The U-g-C3N4 exhibits large specific surface area, effective separation of the photogenerated carriers, and increased visible-light absorbance, which can promote the quantity and lifetime of the photoexcited electrons, resulting in a high photodegradation efficiency of 99.82%. These results show that the interlayer contraction force is a viable option for exfoliating layered materials into a thin-layer structure. This is an interesting and easy method for obtaining thin-layer materials.
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