Photo-induced in-situ synthesis of Cu2O@C nanocomposite for efficient photocatalytic evolution of hydrogen

被引：1

作者：

Li N. ^{[1
,2
]}

Mao S. ^{[1
]}

Yan W. ^{[2
]}

Zhang J. ^{[1
]}

机构：

[1] School of Chemical Engineering and Technology, Taiyuan University of Science and Technology, Taiyuan

[2] State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan

来源：

Ranliao Huaxue Xuebao/Journal of Fuel Chemistry and Technology | 2024年 / 52卷 / 05期

基金：

中国国家自然科学基金;

关键词：

Cu[!sub]2[!/sub]O@C; photo-induced in-situ synthesis; photocatalytic hydrogen evolution;

D O I：

10.1016/S1872-5813(23)60400-1

中图分类号：

学科分类号：

摘要：

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-situ synthesis 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 H2 evolution 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. © 2024 Science Press. All rights reserved.

引用

页码：698 / 706

页数：8

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