Issue 18, 2019

Purposefully designing novel hydroxylated and carbonylated melamine towards the synthesis of targeted porous oxygen-doped g-C3N4 nanosheets for highly enhanced photocatalytic hydrogen production

Abstract

Graphitic carbon nitride (g-C3N4) has been considered as a promising metal-free photocatalyst, but the bulk still suffers from a low specific surface area and poor quantum efficiency. Exfoliation of the bulk into porous heteroatom-doped nanosheets has been confirmed to be an effective strategy for improving the photocatalytic activity. However, purposefully designing targeted precursors towards the synthesis of porous heteroatom-doped g-C3N4 nanostructures for enhanced photocatalytic activity is still a challenge. Here, we intentionally design and construct a new hydroxylated and carbonylated melamine precursor for preparing targeted porous O-doped g-C3N4 nanosheets based on the thermal polymerization reaction pathway. The as-prepared porous O-doped g-C3N4 nanosheets possess a high specific surface area which provides more active sites, and exhibit enhanced transfer and separation of charge carriers, thus displaying an about 18-fold higher hydrogen production activity than the bulk counterpart. This work would stimulate widespread investigations into the development of a designated precursor-reforming strategy for synthesizing highly-active g-C3N4 photocatalysts.

Graphical abstract: Purposefully designing novel hydroxylated and carbonylated melamine towards the synthesis of targeted porous oxygen-doped g-C3N4 nanosheets for highly enhanced photocatalytic hydrogen production

Supplementary files

Article information

Article type
Paper
Submitted
19 ⵢⵓⵍ 2019
Accepted
23 ⵖⵓⵛ 2019
First published
26 ⵖⵓⵛ 2019

Catal. Sci. Technol., 2019,9, 5150-5159

Purposefully designing novel hydroxylated and carbonylated melamine towards the synthesis of targeted porous oxygen-doped g-C3N4 nanosheets for highly enhanced photocatalytic hydrogen production

P. Song, S. Liang, J. Cui, D. Ren, R. Duan, Q. Yang and S. Sun, Catal. Sci. Technol., 2019, 9, 5150 DOI: 10.1039/C9CY01434A

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