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首页> 外文期刊>RSC Advances >Selective photocatalytic oxidation of aromatic alcohols into aldehydes by tungsten blue oxide (TBO) anchored with Pt nanoparticles
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Selective photocatalytic oxidation of aromatic alcohols into aldehydes by tungsten blue oxide (TBO) anchored with Pt nanoparticles

机译：用PT纳米粒子锚定的钨蓝氧化物（TBO）选择性光催化芳香醇氧化成醛

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摘要

Achieving selective transformation of organic functional groups in an energy efficient and environmentally benign way is an important yet challenging endeavour in the field of chemical science. Utilization of heterogeneous photocatalysis for selective conversion holds great potential from cost, energy, and environment viewpoints. In this work, we report the fabrication of nanocomposites comprising hypostoichiometric tungsten oxide (WO _(3? x ) ) modified with platinum nanoparticles and/or reduced graphene oxide (RGO) and their deployment in highly selective (>99%) and efficient (>80%) conversion of aromatic alcohols into corresponding aldehydes under simulated sunlight and ambient conditions. Efficacy of the nanocomposites was investigated by studying the oxidation of benzyl alcohol (BA), 4-methoxybenzyl alcohol (4-MBA) and cinnamyl alcohol (CA) into corresponding aldehyde, in terms of alcohol concentration, RGO and/or Pt loading, and the amount of photocatalyst employed. Systematic investigations on the chemical stability, recyclability, photocatalytic and photoelectrocatalytic aspects helped to shed light on the role of excitons towards the observed selectivity. A plausible mechanism to explain the observed attributes of the photocatalyst is proposed that provides impetus to design future photocatalysts with anticipated attributes for selective oxidation reactions.
机译：以节能和环境良性的方式实现有机官能团的选择性转化是化学科学领域的重要而挑战性的努力。利用异构光电催化的选择性转化率具有从成本，能量和环境观点的巨大潜力。在这项工作中，我们报告了用铂纳米颗粒和/或石墨烯氧化物（RGO）的氧化份氧化钨（WO _（3×））的纳米复合材料的制备及其在高度选择性（> 99％）和高效（在模拟阳光和环境条件下，> 80％）将芳族醇转化为相应的醛。通过将苄醇（Ba），4-甲氧基苄醇（4-MBA）和肉桂醇（CA）的氧化成相应的醛，在醇浓度，RGO和/或PT载荷方面，研究了纳米复合材料的疗效。所用的光催化剂的量。系统研究对化学稳定性，可回收性，光催化和光电催化方面有助于揭示激子对观察到的选择性的作用。提出了一种解释光催化剂的观察到的特征的可粘性机制，其提供了一种与预期的氧化反应的预期特征设计未来光催化剂的动力。

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