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Salt-Assisted Synthesis of 3D Open Porous g-C3N4 Decorated with Cyano Groups for Photocatalytic Hydrogen Evolution

Abstract

Three-dimensional open porous graphitic carbon nitride with cyano groups (3D OPG-C3N4-CN) has been fabricated by a facile two-step process that combines NaCl-assisted freeze-drying with calcination. The NaCl not only works as the template for the 3D open porous structure, but also facilitates the decomposition of g-C3N4 around 500 oC to some extent. Meanwhile, a moderate amount of cyano groups acting as electron capture center are introduced at the edge of the 3D open porous g-C3N4 during the formation process. Compared with the bulk g-C3N4 without NaCl assistance, the 3D OPG-C3N4-CN exhibits significantly improved light absorption, reduced carrier recombination, and more active sites. As a result, the enhanced hydrogen production of 3D OPG-C3N4-CN reaches up to 1590 μmol/h/g when using Pt as cocatalyst, which is about six times as much as that of bulk g-C3N4.

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Publication details

The article was received on 10 Aug 2017, accepted on 02 Jan 2018 and first published on 03 Jan 2018


Article type: Paper
DOI: 10.1039/C7NR05927B
Citation: Nanoscale, 2018, Accepted Manuscript
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    Salt-Assisted Synthesis of 3D Open Porous g-C3N4 Decorated with Cyano Groups for Photocatalytic Hydrogen Evolution

    Z. Chen, S. Lu, Q. Wu, F. He, N. Zhao, C. He and C. Shi, Nanoscale, 2018, Accepted Manuscript , DOI: 10.1039/C7NR05927B

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