Synergy of defect engineering and curvature effect for porous graphite carbon nitride nanotubes promoted photocatalytic hydrogen evolution

Author:

Guo Liping1,Gao Jinyu12,Li Mingxia2,Xie Ying2,Chen Hui2,Wang Shijie1,Li Zhenzi1,Wang Xuepeng1ORCID,Zhou Wei1ORCID

Affiliation:

1. Shandong Provincial Key Laboratory of Molecular Engineering School of Chemistry and Chemical Engineering Qilu University of Technology (Shandong Academy of Sciences) Jinan Shandong China

2. Key Laboratory of Functional Inorganic Material Chemistry School of Chemistry and Materials Science Ministry of Education of the People's Republic of China Heilongjiang University Harbin China

Abstract

AbstractGraphite carbon nitride (g‐C3N4) nanotubes have received extensive attention due to its unique morphology and electronic migration. Herein, the defective porous g‐C3N4 nanotube (DTCN) is prepared through a simple thermal reduction process. The construction of N vacancy and tubular structure can synergistically promote the separation of photogenerated charge carriers. As a result, DTCN demonstrates a higher photocatalytic hydrogen evolution rate (1440 μmol·g−1·h−1), which is 5 times higher than that of the initial g‐C3N4 nanotube (TCN). Importantly, combined with density functional theory calculations and experimental results, it is the first time to prove that the synergy of curvature effect and N vacancy of nanotubes can enhance the adsorption energy of hydrogen and decrease the work function, resulting in more superior photocatalytic performance than the layered structure. This work provides more in‐depth comprehension for the photocatalytic mechanism of nanotube materials, which has inspirational significance for the design of the g‐C3N4 photocatalyst with high performance.

Funder

National Natural Science Foundation of China

Natural Science Foundation of Heilongjiang Province

Natural Science Foundation of Shandong Province

Publisher

Wiley

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