Journal
CHEMICAL ENGINEERING JOURNAL
Volume 384, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2019.123330
Keywords
Photocatalysis; Polymeric carbon nitride; Molybdenum disulphide; Face-to-face heterojunction; Charge separation
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Funding
- Scientific Research Foundation, China University of Geosciences (Wuhan) [110-162301192636]
- Fundamental Research Funds for the Central Universities, China University of Geosciences (Wuhan) [CUG170638]
- Natural Science Foundation of Hubei Province of China [2017CFB190]
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The notorious rapid recombination of photoinduced electron-hole limits the further application of polymeric carbon nitride (PCN) based photocatalysts. Face-to-face heterojunction composed of dissimilar 2D nanomaterials has been explored as a feasible way to facilitate the charge separation of PCN at the atomically well-defined hetero-interface. However, the conventional exfoliation-assembling process is tedious and time-consuming. Herein, a 2D/2D face-to-face heterojunction (MCN) has been constructed between sulfur (S)-doped polymeric carbon nitride nanosheets (SCN) and ultrathin molybdenum disulfide (MoS2) via a facile hydrothermal-polymerization method to overcome the recombination of photoinduced electron-hole pairs. The as-prepared MCN face-to-face heterojunction facilitated charge transport for the intimate interface contact and enhanced the separation of charge carriers, thus exhibiting high H-2 evolution activity (2120 mu mol h(-1) g(-1)) without any other co-catalyst and high efficient degradation of dye. This work provides a facile protocol for synthesis of 2D/2D carbon nitride based photocatalysts towards future energy technology innovation.
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