Hydrogenated Cu2O\Au@CeO2 Z-scheme catalyst for photocatalytic oxidation of amines to imines†,Catalysis Science & Technology

当前位置： X-MOL 学术 › Catal. Sci. Technol. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Hydrogenated Cu2O\Au@CeO2 Z-scheme catalyst for photocatalytic oxidation of amines to imines†
Catalysis Science & Technology ( IF 4.4 ) Pub Date : 2018-10-03 00:00:00 , DOI: 10.1039/c8cy01689e
Yingying Liu _{1,

2,

3,

4,

5} , Yajie Chen _{1,

2,

3,

4,

5} , Wei Zhou _{1,

2,

3,

4,

5} , Baojiang Jiang _{1,

2,

3,

4,

5} , Xin Zhang _{1,

2,

3,

4,

5} , Guohui Tian _{1,

2,

3,

4,

5}

Affiliation

The design and fabrication of highly active visible light photocatalysts for organic synthesis reactions are particularly challenging for solar energy utilization and conversion. Herein, hydrogenated Z-scheme yolk–shell Cu₂O\Au@CeO₂ (H–Cu₂O\Au@CeO₂) photocatalysts were synthesized using cubic Cu₂O as the starting core material via surface Au deposition and oxidation etching process, followed by hydrogenation treatment. When compared with CeO₂, Cu₂O@CeO₂, and Cu₂O@CeO₂\Au nanocomposites, optimized H–Cu₂O\Au@CeO₂ showed remarkably higher visible light oxidation activity for the synthesis of imines from amines at ambient pressure and room temperature. The remarkably enhanced photoactivity of the H–Cu₂O\Au@CeO₂ composite mainly derives from the enhanced photoinduced charge separation efficiency, porous yolk–shell structure, proper surface defects, and well-maintained strong oxidation/reduction capabilities. The Z-scheme charge transfer process and photocatalytic reaction mechanism of the H–Cu₂O\Au@CeO₂ composites were also provided through spectral and photoelectrochemical analyses together with the investigation of structure and photocatalytic oxidation reactions. This study provides a probable approach for designing unique Z-scheme catalysts.

中文翻译：

氢化的Cu ₂ O \ Au @ CeO ₂ Z-方案催化剂，用于胺光催化氧化为亚胺†

用于有机合成反应的高活性可见光光催化剂的设计和制造对于太阳能利用和转化特别具有挑战性。在此，以立方Cu ₂ O为起始核心材料，通过表面金沉积和氧化刻蚀工艺合成了氢化Z型卵黄壳Cu ₂ O \ Au @ CeO ₂（H–Cu ₂ O \ Au @ CeO ₂）光催化剂。，然后进行氢化处理。与CeO ₂，Cu ₂ O @ CeO ₂和Cu ₂ O @ CeO ₂ \ Au纳米复合材料相比，优化后的H–Cu ₂ O \ Au @ CeO ₂在环境压力和室温下，由胺合成亚胺的可见光氧化活性显着提高。H–Cu ₂ O \ Au @ CeO ₂复合材料的显着增强的光活性主要来自增强的光感应电荷分离效率，卵黄-壳结构的多孔性，适当的表面缺陷以及保持良好的强氧化/还原能力。H–Cu ₂ O \ Au @ CeO ₂的Z方案电荷转移过程和光催化反应机理还通过光谱和光电化学分析以及结构和光催化氧化反应的研究提供了复合材料。这项研究为设计独特的Z型催化剂提供了一种可能的方法。

更新日期：2018-10-03

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11