期刊
MATERIALS LETTERS
卷 303, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.matlet.2021.130467
关键词
Nitrogen deficiency; Visible light absorption; Hydrogen production; Photocatalyst
资金
- Department of Science and Technology-Solar Energy Research Initiative (DST-SERI) [DST/TM/SERI/S170 (G)]
A nitrogen-deficient g-C3N4 photocatalyst prepared by a combination of ultrasound and thermal condensation methods exhibited significantly enhanced H2 production rates under sunlight and Xenon light, about 10-11 times higher than bare g-C3N4. The superior activity was attributed to extended visible light absorption and improved charge carrier separation due to the presence of nitrogen defects in g-C3N4.
A nitrogen-deficient g-C3N4 photocatalyst was prepared by a combination of ultrasound and thermal condensation methods. The nitrogen deficiency was confirmed by XPS measurements through the high peak area ratio between C-C and N-C--N bonds. The obtained photocatalyst showed a H2 production rate of 3.90 mmolg-1h- 1 (sunlight) and 4.1 mmolg-1h- 1 (Xenon light), which is about -10 and -11 times higher than bare g-C3N4, respectively. The superior activity obtained was attributed to the extended visible light absorption and improved charge carrier separation due to the presence of nitrogen defects in g-C3N4.
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