Ag2S‐CdS p‐n Nanojunction‐Enhanced Photocatalytic Oxidation of Alcohols to Aldehydes,Small

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Ag2S‐CdS p‐n Nanojunction‐Enhanced Photocatalytic Oxidation of Alcohols to Aldehydes
Small ( IF 13.0 ) Pub Date : 2020-11-03 , DOI: 10.1002/smll.202001529
Yueyue Dong ₁ , Yanling Su ₁ , Yanfang Hu ₁ , Haixia Li ₁ , Wei Xie ₁

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Selective oxidation of alcohols to aldehydes under mild conditions is important for the synthesis of high‐value‐added organic intermediates but still very challenging. For most of the thermal and photocatalytic systems, noble metal catalysts or harsh reaction conditions are required. Herein, the synthesis and use of Ag₂S‐CdS p‐n nanojunctions as an efficient photocatalyst for selective oxidation of a series of aromatic alcohols to their corresponding aldehydes is reported. High quantum efficiencies (59.6% and 36.9% under 380 and 420 nm, respectively) are achieved in air atmosphere at room temperature. Photoluminescence and photo‐electrochemical tests show that the excellent performance is mainly due to the p‐n junction‐enhanced charge separation and transfer for the activation of both O₂ (in air) and substrates. This study demonstrates the potential of p‐n junction in photocatalytic synthesis under mild conditions.

中文翻译：

Ag2S-CdS p-n纳米结增强型醇对醛的光催化氧化

在温和条件下将醇选择性氧化为醛对于合成高附加值的有机中间体很重要，但仍然非常困难。对于大多数热和光催化系统，需要贵金属催化剂或苛刻的反应条件。本文报道了Ag ₂ S-CdS p-n纳米结的合成和使用，作为一种有效的光催化剂，用于将一系列芳族醇选择性氧化为相应的醛。在室温下的空气气氛中，可以获得很高的量子效率（分别在380和420 nm下为59.6％和36.9％）。光致发光和光电化学测试表明，出色的性能主要归功于p-n结增强了电荷的分离和转移，从而激活了O ₂（在空气中）和基材。这项研究证明了在温和条件下p-n结在光催化合成中的潜力。

更新日期：2020-11-27

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