Journal
JOURNAL OF CATALYSIS
Volume 402, Issue -, Pages 72-82Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcat.2021.08.028
Keywords
CdS nanorods; Au nanoparticles; Selective organic transformations; Aromatic alcohols; Nitroaromatic hydrocarbons
Categories
Funding
- National Natural Science Foundation of China (NSFC) [51972134, 51772118, 52002142]
- Natural Science Foundation of Educational Committee of Anhui Province [KJ2019A0602]
- fund of the State Key Laboratory of Catalysis in DICP [N-20-09, N-20-10]
- National College Student Innovation and Entrepreneurship Project [202010373010]
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This study developed a strategy using Au/CdS nanocomposites for selective organic transformations, showing excellent charge separation and transfer performance, leading to increased efficiency in the oxidation of aromatic alcohols and reduction of nitroaromatic hydrocarbons.
Integrating ultra-low content precious metal and low-cost solid-state optical absorber for effective utilization of photogenerated charges has been a hopeful strategy for selective organic transformations (SOTs). Herein, series of novel Au/CdS nanocomposites with (ultra-) low-content Au were prepared via two-step solvothermal treatment for the selective oxidation (SO) of aromatic alcohols (AA) and selective reduction (SR) of nitroarenes (NA) in one coupling system. Taking the advantages of electron accumulator property of Au and virtues of formed tight heterojunction between 5 nm gold nanoparticle (Au NPs) and CdS nanorods (CdS NRs), the Au/CdS nanocomposites exhibited outstanding charge separation and transfer performance and durable stability compared with blank CdS. The activities corresponding to the oxidation of aromatic alcohols and reduction of nitroaromatic hydrocarbons on the optimal 0.0028% Au/CdS samples are about 2 and 4 times higher than those of blank CdS. This is mainly due to the introduction of Au NPs and the construction of reasonable coupling reaction system, thus realizing the synergistic utilization of photogenerated charges. Finally, the mechanism and photocatalytic reaction pathway for the coupling reaction system were also proposed. (c) 2021 Elsevier Inc. All rights reserved.
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