Spatial separation of dual-cocatalysts on bismuth vanadate for selective aerobic oxidation of benzylalcohols to benzaldehydes under visible light irradiation

Jin Xu; Li Rengui; Zhao YueLiu XiaodanWang XiaoqiJiao HangLi Jianming

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Spatial separation of dual-cocatalysts on bismuth vanadate for selective aerobic oxidation of benzylalcohols to benzaldehydes under visible light irradiation

机译：空间分离dual-cocatalysts铋有氧氧化钒酸的选择性benzylalcohols苯甲醛在可见的光照射

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The selective conversion of alcohols to aldehydes under ambient conditions using semiconductor-based photocatalysts has attracted more and more attention in organic synthesis. In this work, bismuth vanadate (BiVO4) crystals with spatially separated dual-cocatalysts on different facets were introduced as photocatalysts for aerobic oxidation under visible light. It was found that the photocatalytic conversion of benzylalcohols to benzaldehydes was remarkably enhanced when Pt and MnOx are selectively deposited on the {010} and {110} facets of the BiVO4 crystal, acting as reduction and oxidation cocatalysts, respectively. The superior performance could be attributed to the spatial separation of the reduction and oxidation reactions so that the recombination and reverse reactions are greatly inhibited. We also found that adding a small amount of H2O in the system to increase the solubility of the photocatalysts at the interface of water and oil can remarkably boost the reaction rate of aerobic oxidation. Our work shows a useful strategy for the rational design and construction of highly efficient photocatalyst systems for the synthesis of organic compounds via photocatalytic processes.

机译：醇与醛的选择性转换在环境条件下使用是从汤姆斯论文吸引了在有机合成越来越多的关注。这项工作,钒酸铋(BiVO4)晶体在空间上分开dual-cocatalysts不同方面介绍了作为催化剂有氧氧化下可见光。发现光催化转化benzylalcohols苯甲醛是显著的当Pt和MnOx选择性提高沉积在{010}和{110}面BiVO4晶体,作为减少和氧化分别为:。性能可以归因于空间分离的减少和氧化反应,这样重组和逆转反应是极大地抑制。系统中添加少量的水增加催化剂的溶解性在水和油可以明显的界面提高有氧氧化的反应速率。工作显示了理性的一个有用的策略高效的设计和施工光催化剂的合成系统通过光催化过程的有机化合物。

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《Catalysis science & technology》 |2018年第23期|6173-6179|共7页
作者
Jin Xu; Li Rengui; Zhao YueLiu XiaodanWang XiaoqiJiao HangLi Jianming;
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作者单位

Chinese Acad Sci, Dalian Natl Lab Clean Energy, Collaborat Innovat Ctr Chem Energy Mat IChem 2011, State Key Lab Catalysis,Dalian Inst Chem Phys, Zhongshan Rd 457, Dalian 116023, Peoples R China;

PetroChina, RIPED, 20 Xueyuan Rd, Beijing 100083, Peoples R China;

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正文语种英语
中图分类汉语教学;
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bismuth vanadium tetraoxide; benzaldehyde; spatial separationReaction ratesOrganic SynthesisVisible Lightaerobic oxidationPhotocatalysts;

机译：铋钒tetraoxide;苯甲醛;空间separationReaction ratesOrganic SynthesisVisibleLightaerobic oxidationPhotocatalysts;

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Spatial separation of dual-cocatalysts on bismuth vanadate for selective aerobic oxidation of benzylalcohols to benzaldehydes under visible light irradiation

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