4.7 Article

Au@Pt nanoparticles modified classical CdS nanorods for synergistically utilizing photoexcited charges in coupled selective organic transformations

Journal

JOURNAL OF ALLOYS AND COMPOUNDS
Volume 938, Issue -, Pages -

Publisher

ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2022.168667

Keywords

Au@Pt nanoparticles; Nitroarenes; Selective organic transformations; Aromatic alcohols; Photocatalysis

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A novel Au13@Pt/CdS hybrid nanomaterial was prepared and used for the selective redox reaction of aromatic alcohols and nitroarenes. The anchoring of Au13@Pt nanoparticles on CdS provided abundant e- enrichment sites and wider charge transfer channels, leading to significantly improved photocatalytic performance. This study is expected to offer a way to fabricate a dual-functional photocatalyst for selective organic transformations.
The photocatalyst construction determines the cost and photoexcited charge kinetics, whereas reaction system design ensures the synergic utilization of photoexcited charges. Herein, a novel Au13@Pt/CdS hybrid nanomaterial was prepared and used for the coupling selective redox system of aromatic alcohols and nitroarenes. The Au13@Pt nanoparticles evenly and tightly anchored on CdS provided abundant e- enrich-ment sites and wider charge transfer channels and largely improved photocatalytic performance. After 4 h visible-light illumination (lambda > 420 nm), the optimal 0.00115 % Au13@Pt/CdS sample displays that the the-oretical yields of aniline (AL) and p-methoxybenzaldehyde (p-MBA) are up to 71.5 % and 94.7 % with an impressive selectivity of over 95 %, therefore, parts of the generated AL and p-MBA further formed Schiff base with a 24.3 % yield. Therefore, this work is expected to offer a way to fabricate a dual-functional photocatalyst for selective organic transformations (P-SOTs). A coupling mechanism of simultaneous SO p -MBA and SR of NB in one system was proposed by a series of physical and chemical characterizations combined with in suit DRIFTS and theoretical calculations.(c) 2022 Elsevier B.V. All rights reserved.

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