Graphitic carbon nitride nanoribbon for enhanced visible-light photocatalytic H2 production

Xiuming Bu; Yu Bu; Siwei Yang; Feng Sun; Linfan Tian; Zheng Peng; Peng He; Jing Sun; Tao Huang; Xianying Wang; Guqiao Ding; Junhe Yang; Xiaoming Xie

doi:10.1039/C6RA23218C

Graphitic carbon nitride nanoribbon for enhanced visible-light photocatalytic H₂ production†

Xiuming Bu,^ab Yu Bu,^a Siwei Yang,^b Feng Sun,^a Linfan Tian,^b Zheng Peng,^b Peng He,^b Jing Sun,^b Tao Huang,^b Xianying Wang,*^a Guqiao Ding,*^b Junhe Yang^a and Xiaoming Xie^b

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* Corresponding authors

^a School of Materials Science and Engineering, University of School for Science and Technology, Shanghai 20093, P. R. China
E-mail: xianyingwang@usst.edu.cn

^b School Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Science, Shanghai 200500, P. R. China
E-mail: gqding@mail.sim.ac.cn

Abstract

Chemical scissors provide a new vision to manufacture unique carbon nitride nanostructures with improved photocatalytic performance. Herein, graphitic carbon nitride nanoribbon (GCNR), with a typical length of 1.75 μm, width of 210 nm and thickness of 3 nm, was obtained by acid treatment of bulk g-C₃N₄ with HNO₃/H₂SO₄ mixtures. The C/N molar ratio of GCNR (around 0.629) was much smaller than that of pristine g-C₃N₄ (0.758). It was demonstrated that larger amounts of carbon vacancies on the ultra-thin ribbon structures could contribute to improved electron–hole separation efficiency and excellent photocatalytic H₂ production. The average H₂ production rate of GCNR under visible light was 49.4 μmol h⁻¹, which was 20 times that of the original catalyst.

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Graphitic carbon nitride nanoribbon for enhanced visible-light photocatalytic H₂ production†

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Graphitic carbon nitride nanoribbon for enhanced visible-light photocatalytic H₂ production

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