Journal
JOURNAL OF MATERIALS CHEMISTRY A
Volume 7, Issue 13, Pages 7628-7635Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c9ta00129h
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Funding
- National Natural Science Foundation of China [21776059]
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Improving charge separation efficiency and accelerating surface reaction kinetics are two challenging issues for the graphitic carbon nitride (g-C3N4) photocatalyst. Surface atom decoration is a facile and efficacious strategy to modulate the electronic structure and then affect the local spatial charge separation of the photocatalyst. Here, we first reported a surface P atom grafting strategy for g-C(3)N(4)via P-N bond formation to effectively promote the local spatial charge separation and ample reactive sites. The post-calcination process allowed controllable grafting of P-OH at the corner-nitrogen sites in tri-s-triazine of g-C3N4, which resulted in an impurity state, and it acted as an electron capture center for local spatial charge separation and reactive sites. Thus, the surface N-P-OH bond modulation of g-C3N4 rendered nearly four-fold enhancement in the hydrogen evolution rate. The ability to build pure surface P-N motif modulation presents a promising strategy to realize the precise band engineering of modulated g-C3N4. These findings would deepen the understanding of the nonmetal atom decoration-related issues of g-C3N4-based materials.
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