期刊
JOURNAL OF COLLOID AND INTERFACE SCIENCE
卷 624, 期 -, 页码 460-470出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2022.05.161
关键词
CdS; Core/shell nanostructures; Magnetic photocatalyst; Selective oxidation; H2O2 production
资金
- National Natural Science Foundation of China [21471004]
- Scientific research project of General Administration of Customs [2020HK197]
- Science Foundation of Zhejiang Sci-Tech University [17062002-Y]
In this study, a magnetically recoverable photocatalyst of Fe3O4@CdS@CQDs ternary core-shell heterostructures was fabricated and applied for selective alcohol oxidation coupled with H2O2 production. The photocatalyst exhibited distinct advantages of full solar spectral absorption, efficient charge separation, and high stability, and showed excellent performance in converting benzyl alcohol to benzaldehyde accompanied with H2O2 production.
Photocatalytic aerobic oxidation of aromatic alcohols to corresponding aldehydes coupled with producing hydrogen peroxide (H2O2) represents one of the most efficient strategies for converting solar energy into chemical energy. In this work, a magnetically recoverable photocatalyst of Fe3O4@CdS@CQDs ternary core-shell heterostructures is elaborately fabricated through the hydrothermal growth of CdS on Fe3O4 nanospheres with in-situ incorporation of carbon quantum dots (CQDs) and used for selective alcohol oxidation coupled with H2O2 production. The Fe3O4@CdS@CQDs photocatalyst possess distinct advantages of full solar spectral absorption, efficient charge separation, and high stability. The Fe(3)O4(-)nanosphere cores not only endow photocatalyst with the characteristics of magnetic recovery but also form Fe3O4@CdS Z-scheme heterojunction to prevent CdS from photocorrosion. The in-situ modified CQDs act as charge mediators to accelerate the photogenerated electron-hole separation and afford active sites to facilitate H2O2 production. As a result, the Fe3O4@CdS@CQDs photocatalyst exhibits excellent performance in selectively converting benzyl alcohol to benzaldehyde accompanied with H2O2 production. The generation rates of benzaldehyde and H2O2 reach up to 57.22 and 27.06 mmol.g(CdS)(-1).h(-1), respectively. This work highlights a rational construction of magnetic heterostructure photocatalyst and its application in the photo-redox coupling reactions. (C) 2022 Elsevier Inc. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据