Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 216, Issue -, Pages 114-121Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apcatb.2017.05.049
Keywords
CDs-CdS nanocomposite; Photocatalyst; Visible-light water splitting; Catalytic activity and stability
Funding
- Collaborative Innovation Center of Suzhou Nano Science and Technology
- National Natural Science Foundation of China [51422207, 51572179, 21471106, 21501126]
- Natural Science Foundation of Jiangsu Province [BK20161216]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
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Cadmium sulfide (CdS) has long time been one of the most promising inorganic photocatalysts for hydrogen production driven by visible light. However, the photocorrosion of CdS is the most serious problem which constrains its development. Here, we report the design and fabrication of a carbon dots-cadmium sulfide (CDs-CdS) nanocomposite, showing significant photocatalytic water splitting properties with impressive stability without requirement for any sacrificial agents or cocatalysts. The highest hydrogen production rate was obtained for about 2.55 timol h(-1), with an oxygen evolution rate for about 0.52 timol h(-1), when the concentration of CDs in the sample is 0.03 gcps/gcatalyst. Even the produced H2 and 02 are not equal to the stoichiometric ratio of 2:1 (H2:02), the CDs-CdS nanocomposite shows greater stability (8 -time repetitive catalytic experiments) than the CdS catalysts reported up to now (without sacrificial agents or cocatalysts). It is also inspiring that when we increased the concentration of CDs in the catalysts, the produced H2 and 02 were gradually adjusted to meet the stoichiometric ratio of 2:1 in spite of low hydrogen production rate (0.13 timol h(-1)). (C) 2017 Elsevier B.V. All rights reserved.
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