Directing the CdS nanosheet and nanowire to high efficiency for photocatalytic anaerobic dehydrogenation of benzyl alcohol to benzaldehyde by depositing Au25 nanoclusters

Q3 Energy 燃料化学学报 Pub Date : 2023-12-01 DOI:10.1016/S1872-5813(23)60373-1

Xing-chi LI , Han ZHAO , Xiao-li PAN , Yang SU , Ren-gui LI , Hua WANG , Lei-lei KANG , Xiao-yan LIU

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Abstract

The photocatalysis of direct dehydrogenation of benzyl alcohol to benzaldehyde is an energy saving way to synthesize fine chemicals and pure hydrogen by using solar energy. The CdS-based catalysts were one of the typical kinds of photocatalysts for this reaction. The morphology of CdS could be easily tuned, which could greatly influence the photocatalytic performances. However, the morphology effect of CdS on the photocatalytic behaviour of the direct dehydrogenation of benzyl alcohol has not been investigated yet. In this work, we synthesized CdS with two different morphologies (nanosheet (NS) and nanowire (NW)) and found the CdS-NS showed much higher photocatalytic activity for converting the benzyl alcohol than the CdS-NW, but the selectivity to benzaldehyde over the two supports was very low. By depositing Au₂₅ nanoclusters on the CdS-NW and CdS-NS, the morphology effect of the CdS support could be mitigated and their catalytic activity and selectivity could be greatly boosted for the photocatalytic anaerobic dehydrogenation of benzyl alcohol to benzaldehyde and H₂. The results of this work would provide new insight into the design of efficient photocatalysts for synthesizing fine chemicals.

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通过沉积 Au25 纳米团簇，引导 CdS 纳米片和纳米线高效光催化厌氧脱氢将苯甲醇转化为苯甲醛

光催化苯甲醇直接脱氢为苯甲醛是利用太阳能合成精细化学品和纯氢的一种节能方法。基于 CdS 的催化剂是该反应的典型光催化剂之一。CdS 的形态很容易调整，这在很大程度上会影响光催化性能。然而，CdS 的形貌对苯甲醇直接脱氢的光催化行为的影响尚未得到研究。在这项工作中，我们合成了两种不同形态（纳米片（NS）和纳米线（NW））的 CdS，发现 CdS-NS 转化苯甲醇的光催化活性远高于 CdS-NW，但对苯甲醛的选择性在两种支持物上都很低。通过在 CdS-NW 和 CdS-NS 上沉积 Au25 纳米团簇，可以减轻 CdS 支持物的形貌效应，从而大大提高它们在光催化厌氧脱氢将苯甲醇转化为苯甲醛和 H2 的催化活性和选择性。这项工作的成果将为设计合成精细化学品的高效光催化剂提供新的启示。

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来源期刊

燃料化学学报 Chemical Engineering-Chemical Engineering (all)

CiteScore

2.80

自引率

0.00%

发文量

5825

期刊介绍： Journal of Fuel Chemistry and Technology (Ranliao Huaxue Xuebao) is a Chinese Academy of Sciences(CAS) journal started in 1956, sponsored by the Chinese Chemical Society and the Institute of Coal Chemistry, Chinese Academy of Sciences(CAS). The journal is published bimonthly by Science Press in China and widely distributed in about 20 countries. Journal of Fuel Chemistry and Technology publishes reports of both basic and applied research in the chemistry and chemical engineering of many energy sources, including that involved in the nature, processing and utilization of coal, petroleum, oil shale, natural gas, biomass and synfuels, as well as related subjects of increasing interest such as C1 chemistry, pollutions control and new catalytic materials. Types of publications include original research articles, short communications, research notes and reviews. Both domestic and international contributors are welcome. Manuscripts written in Chinese or English will be accepted. Additional English titles, abstracts and key words should be included in Chinese manuscripts. All manuscripts are subject to critical review by the editorial committee, which is composed of about 10 foreign and 50 Chinese experts in fuel science. Journal of Fuel Chemistry and Technology has been a source of primary research work in fuel chemistry as a Chinese core scientific periodical.