Journal
JOURNAL OF COLLOID AND INTERFACE SCIENCE
Volume 567, Issue -, Pages 202-212Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2020.02.017
Keywords
Photocatalysis; Water splitting; Z-scheme; S-doped g-C3N4; Ru/SrTiO3:Rh; [Co(bpy)(3)](3+/2+)
Categories
Funding
- Ministry of Science and Technology, Taiwan [MOST 107-2221-E-033-032-MY3, 108-2221E-033-034-MY3]
- JSPS [171(05843)]
- Asahi Glass Foundation, Japan
- Chung Yuan Christian University
- KEK-PF , Japan [2018G589]
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In this study, an S-doped g-C3N4 nanosheet was prepared as a photocatalyst for effective oxygen evolution reaction. Sulfur plays a crucial role in S-doped g-C3N4 not only in increasing the charge density but also in reducing the energy band gap of S-doped g-C3N4 via substitution of nitrogen sites. S-doped g-C3N4 can serve as an oxygen-evolved photocatalyst, when combined with Ru/SrTiO3:Rh in the presence of [Co(bpy)(3)](3+/2+) as an electron mediator, enables photocatalytic overall water splitting under visible light irradiation with hydrogen and oxygen production rates of 24.6 and 14.5 mu mol-h(-1), respectively. Moreover, the photocatalytic overall water splitting to produce H-2 and O-2 using this Z-scheme system could use for five runs to at least 94.5 h under visible light irradiation. On the other hand, S-doped g-C3N4 can reduce biofouling by bacteria such as Escherichia toll by more than 70%, by simply incubating the Sdoped g-C3N4 sample with bacterial solution under light irradiation. Our results suggest that S-doped g-C3N4 is a potentially effective, green, and promising material for a variety of photocatalytic applications. (C) 2020 Elsevier Inc. All rights reserved.
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