期刊
NANO ENERGY
卷 41, 期 -, 页码 1-9出版社
ELSEVIER
DOI: 10.1016/j.nanoen.2017.09.012
关键词
Heterojunction photocatalyst; C-TiO2/g-C3N4; Photocatalytic hydrogen production
类别
资金
- Thailand Research Fund [RSA6080017]
- NSFC [51421091]
- National Science Foundation for Distinguished Young Scholars for Hebei Province of China [E2016203376]
- Thai Government Budget, Chulalongkorn University [GB_B_60_114_62_03]
- Ratchadapisek Sompoch Endowment Fund, Chulalongkorn University [GRU 60-001-62-001-1]
- State Key Laboratory of Metastable Materials Science and Technology, Yanshan University
Graphitic carbon nitride (g-C3N4) photocatalysts have attracted much attention towards harvesting solar energy for applications in energy and environment sectors. However, separation of electron-hole pairs is an intrinsic problem for the bulk g-C3N4. Here, we report the tiny amount of carbon doped TiO2 modified g-C3N4 (C-TiO2/gC(3)N(4)) with a narrow bandgap and prolonged lifetime of charge carriers. This heterojunction photocatalysts were successfully fabricated via a facile heat treatment under atmosphere. The enhanced separation of photogenerated charge carriers and narrow band gap confer superior photocatalytic activities with 5.728 mmol/g photogenerated hydrogen gas for 5 h and 52.395 mmol/g for 64 h in triethanolamine aqueous solution. The apparent quantum efficiency of C-TiO2/g-C3N4 is similar to 6.2% under 420 nm irradiation, which is about 2.4 times higher than the corresponding value 2.6% of pristine g-C3N4. This photocatalyst with excellent photocatalytic performance and photo-stability can work as a promising candidate to applicate in solar-to-fuel conversion and environmental remediation.
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