Precursor-reforming strategy induced g-C 3 N 4 microtubes with spatial anisotropic charge separation established by conquering hydrogen bond for enhanced photocatalytic H 2 -production performance

Huinan Che, Guangbo Che, Pengjie Zhou, Ning Song, Chunxue Li, Chunmei Li, Chunbo Liu*, Xiaoteng Liu, Hongjun Dong

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

26 Citations (Scopus)

Abstract

Precursor-reforming strategy induced graphitic carbon nitride (g-C 3 N 4 ) with different morphologies for enhanced photocatalytic hydrogen (H 2 ) evolution activity is highly desirable. Herein, g-C 3 N 4 microtubes (mg-C 3 N 4 ) with adjustable closure degree of microtube orifice and spatial anisotropic charge separation are established by conquering hydrogen bond during thermally exfoliate precursor. Compared to the bulk g-C 3 N 4 (bg-C 3 N 4 ) and ultrathin g-C 3 N 4 (ug-C 3 N 4 ), the tubular structure endows mg-C 3 N 4 with spatial anisotropic charge separation that accelerates transfer of charge carriers. As expected, the photocatalytic H 2 evolution (PHE) activity of mg-C 3 N 4 has been obviously enhanced. Particularly, the mg-C 3 N 4 -24 shows the best PHE activity (957.9 μmol h −1 g −1 ), which is over 18.72 and 3.77 times higher than the bg-C 3 N 4 and ug-C 3 N 4 , respectively. In addition, selective photo-deposition experiment results reveal a charge carriers migration behavior that photoproduction electrons migrate to the outer shell and holes prefer to move onto the inner shell of mg-C 3 N 4 , thus achieving efficient spatial anisotropic charge separation. We firmly believe that the work presents significant advancement for the design of other materials by precursor-reforming strategy.

Original languageEnglish
Pages (from-to)224-233
Number of pages10
JournalJournal of Colloid and Interface Science
Volume547
Early online date1 Apr 2019
DOIs
Publication statusPublished - 1 Jul 2019

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