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Sulfur and potassium co-doped graphitic carbon nitride for highly enhanced photocatalytic hydrogen evolution

Version 2 2024-06-05, 02:24
Version 1 2020-05-22, 12:53
journal contribution
posted on 2024-06-05, 02:24 authored by L Chen, D Zhu, J Li, X Wang, J Zhu, Paul FrancisPaul Francis, Y Zheng
Modifying the structure of a photocatalyst to tailor its electronic and physicochemical properties is an effective approach for efficient photocatalysis. Herein, we demonstrate that co-doping non-metal (S) and metal (K) atoms into graphitic carbon nitride (g-C3N4) provides excellent visible-light photocatalytic hydrogen production activity of 8.78 mmol g−1 h−1, which is 98 times higher than that of pristine g-C3N4 (0.09 mmol g−1 h−1). The apparent quantum efficiency of the S+K-co-doped g-C3N4 reaches 70 % at 420 nm. This outstanding photocatalytic performance attributed to an increased specific surface area from 6.78 to 74.23 cm3 g−1, which reduced the recombination of photogenerated charge carriers and enhanced conductivity. Various characterizations are undertaken to elucidate the S+K-co-doped g-C3N4 photocatalytic mechanism. Our work not only demonstrates a facile, eco-friendly and scalable strategy for the synthesis of S+K-co-doped g-C3N4 photocatalysts, but also opens a new avenue for the design of co-doped photocatalysts.

History

Journal

Applied Catalysis B: Environmental

Volume

273

Article number

ARTN 119050

Pagination

1 - 9

Location

Amsterdam, The Netherlands

ISSN

0926-3373

eISSN

1873-3883

Language

English

Publication classification

C Journal article, C1 Refereed article in a scholarly journal

Publisher

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