Selective oxidation of aromatic alcohols to corresponding aromatic aldehydes using In2S3 microsphere catalyst under visible light irradiation
Selective oxidation of aromatic alcohols to corresponding aromatic aldehydes using In2S3 microsphere catalyst under visible light irradiation
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可见光照射下In2S3微球催化剂选择性氧化芳香醇生成相应芳香醛
DOI：
10.1016/j.cej.2014.02.029
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发表时间：
2014-06
影响因子：
15.1
通讯作者：
Shifu Chen
中科院分区：
文献类型：
--
作者：
Mengli Xie;Xia Dai;Sugang Meng;Xianliang Fu;Shifu Chen
选择性氧化已成为有机物合成和环境修复的另一种绿色途径。本文研究了以In 2S 3微球为光催化剂，在可见光照射下选择性氧化芳香醇制备相应的芳香醛。以InCl 3·4 H2O和CH 3CSNH 2为前驱体制备了带隙为1.96eV的In 2S 3微球。采用X射线粉末衍射、紫外-可见漫反射光谱、扫描电镜、透射电镜、能谱、氮吸附-脱附和光致发光光谱研究了In 2S 3光催化剂的结构和光学性能。结果表明，In 2 S 3微球在芳香醇转化为相应芳香醛的反应中具有良好的光催化性能。对于苯甲醇的选择性氧化，光照时间为4 h时，转化率为41.5%，收率为41.4%。In 2 S 3微球作为光催化剂，在苯甲醇选择性氧化反应中重复使用5次，稳定性良好。O2-和自由基点OH是光催化过程中重要的氧化剂。提出了芳香醇转化为芳香醛的可能机理。
Selective oxidation has become an alternative green way for organics synthesis and environmental remediation. In this paper, selective oxidation of aromatic alcohols to corresponding aromatic aldehydes under visible light irradiation using In 2 S 3 microsphere as a photocatalyst was investigated. In 2 S 3 microsphere with a band gap of 1.96 eV was prepared by using InCl 3· 4H 2 O and CH 3 CSNH 2 as precursor. The structure and optical properties of In 2 S 3 photocatalyst were investigated by X-ray powder diffraction, UV–vis diffuse reflectance spectroscopy, scanning electron microscopy, transmission electron microscopy, energy-dispersive spectroscopy, nitrogen adsorption–desorption and photoluminescence spectra. The results showed that the In 2 S 3 microsphere has an excellent photocatalytic performance in the conversion of aromatic alcohols to corresponding aromatic aldehydes. For selective oxidation of benzyl alcohol, when illumination time is 4 h, the conversion reaches to 41.5%, and the yield is 41.4%. In 2 S 3 microsphere as a photocatalyst has a good stability when it was used 5 times for selective oxidation of benzyl alcohol. O 2-and radical dot OH are the important oxidizing agents in the photocatalytic process. The possible mechanism for the conversion of aromatic alcohols to corresponding aromatic aldehydes was proposed.
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