Details

Autor(en) / Beteiligte

• Tian, Xiao
• Ying-jie, Sun
• Jiang-yan, He
• Xiao-jing, Wang
• Zhao, Jun
• Shi-zhang, Qiao
• Fa-tang, Li

Titel

Surface P atom grafting of g-C3N4 for improved local spatial charge separation and enhanced photocatalytic H2 production

Ist Teil von

• Journal of materials chemistry. A, Materials for energy and sustainability, 2019-01, Vol.7 (13), p.7628-7635

Ort / Verlag

Cambridge: Royal Society of Chemistry

Erscheinungsjahr

2019

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• 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-C3N4via 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.