Journal
JOURNAL OF COLLOID AND INTERFACE SCIENCE
Volume 581, Issue -, Pages 159-166Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2020.07.119
Keywords
Graphitic carbon nitride; Hydrogen evolution; Ultra-thin nannsheet; Visible light; Photocatalysis
Categories
Funding
- National Natural Science Foundation of China [51702092]
- Natural Science Foundation of Hubei Province [2018CFB282]
- Science Foundation of Hubei University of Technology [BSQD2017065, BSQD2016045]
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The study improved the preparation process of g-C3N4 and obtained a new photocatalyst H-CN with a higher absorption range and faster hydrogen production activity. An appropriate doping amount of Pt cocatalyst significantly increased the hydrogen production rate of H-CN.
The two-dimensional semiconductor photocatalytic material has excellent photocatalytic H-2 evolution activity. In order to further improve the hydrogen production activity of g-C3N4, this study improved the preparation process of g-C3N4 and obtained a new photocatalyst (name H-CN) with a higher absorp-tion range, larger specific surface area, and faster hydrogen production activity. Compared with the originally prepared g-C3N4, the H-CN absorption range has been improved, and the utilization of visible light has reached 650 nm. When the doping amount of Pt cocatalyst was 1.0 wt%, the H-CN demonstrates excellent photocatalytic hydrogen production activity, with a hydrogen production rate of 4.3 mmol h(-1).g(-1), which was 7.0 times higher than that pure 1.0 wt% Pt/g-C3N4. The fluorescence spectroscopy of H-CN showed better separation of carriers and longer lifetime. This study has guiding significance for the preparation of subsequent ultra-thin nanosheet photocatalysts and the establishment of high efficiency photocatalytic systems. (C) 2020 Elsevier Inc. All rights reserved.
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