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Photo-induced in-situsynthesis of Cu2O@C nanocomposite for efficient photocatalytic evolution of hydrogen
- Source :
- Journal of Fuel Chemistry and Technology; May 2024, Vol. 52 Issue: 5 p698-706, 9p
- Publication Year :
- 2024
-
Abstract
- Cuprous oxide (Cu2O) is an ideal visible light catalyst owing to its narrow band gap, environmental benignity and abundant storage; however, the fast recombination of photogenerated charge carriers and poor stability of Cu2O has impeded its application in photocatalysis. Herein, we demonstrate that Cu2O@C nanocomposite can spontaneously evolve from a methanol aqueous solution containing cupric ions under the induction of irradiation. Compared with the traditional carbon coating method, the Cu2O@C nanocomposite obtained by the photo-induced in-situsynthesis can reserve superior original characteristics of the semiconductor under mild reaction conditions, promote the charge transfer and enhance the separation efficiency of charge carriers; in addition, the carbon shells can also effectively prevent Cu2O from photo-corrosion. As a result, the Cu2O@C nanocomposite exhibits excellent photocatalytic activity in the hydrogen evolution in comparison with the Cu2O particles; the H2evolution rate over the Cu2O@C nanocomposite reaches 1.28 mmol/(g·h) under visible light, compared with the value of 0.065 mmol/(g·h) over Cu2O. Moreover, the Cu2O@C nanocomposite displays good cycle stability, viz., without any deactivation in the catalytic activity after five cycles.
Details
- Language :
- English
- ISSN :
- 18725813
- Volume :
- 52
- Issue :
- 5
- Database :
- Supplemental Index
- Journal :
- Journal of Fuel Chemistry and Technology
- Publication Type :
- Periodical
- Accession number :
- ejs66246817
- Full Text :
- https://doi.org/10.1016/S1872-5813(23)60400-1