Journal
CHEMSUSCHEM
Volume 10, Issue 22, Pages 4451-4456Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cssc.201701392
Keywords
alcohols; crystallinity; graphitic carbon nitride; photocatalysis; oxidation
Funding
- National Basic Research Program of China [2013CB632405]
- National Natural Science Foundation of China [21425309, 21643009, 21761132002]
- National Postdoctoral Program for Innovative Talents [BX201600031]
- 111 Project
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Exploiting efficient photocatalysts with strengthened structure for solar-driven alcohol oxidation is of great significance. The photocatalytic performance of graphitic carbon nitrides can be considerably promoted by modulating its crystallinity. Results confirmed that a high crystallinity accelerates the separation and transfer of photogenerated charge carriers, thus providing more free charges for photoredox reactions. More importantly, the high crystallinity facilitated the adsorption of benzyl alcohol and desorption of benzaldehyde and simultaneously lowered the energy barrier for O-2 activation. As a result, the crystalline carbon nitride exhibited a roughly twelvefold promotion with respect to the normal carbon nitride. The remarkable enhancement of activity can be attributed to the synergistic effects of increased electron-hole separation and increased surface reaction kinetics. These findings will open up new opportunities to modulate the structure of polymers for a wide variety of organic reactions.
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