High efficient photocatalytic selective oxidation of benzyl alcohol to benzaldehyde by solvothermal-synthesized ZnIn2S4 microspheres under visible light irradiation
High efficient photocatalytic selective oxidation of benzyl alcohol to benzaldehyde by solvothermal-synthesized ZnIn2S4 microspheres under visible light irradiation
复制标题
DOI：
10.1016/j.jssc.2013.07.015
复制
发表时间：
2013-09
影响因子：
3.3
通讯作者：
Zhixin Chen;Jingjing Xu;Z. Ren;Yunhui He;Guangcan Xiao
中科院分区：
文献类型：
--
作者：
Zhixin Chen;Jingjing Xu;Z. Ren;Yunhui He;Guangcan Xiao
采用溶剂热法合成了掺杂ZnIn 2S 4样品。通过X射线衍射、紫外-可见光漫反射光谱、场发射扫描电镜、氮吸附-脱附和X射线光电子能谱等测试手段对它们的性质进行了表征。结果表明，乙醇溶剂对万寿菊状ZnIn 2S 4微球的形貌、光学和电学性质有显著影响。以分子氧为氧化剂，考察了ZnIn 2S 4的可见光催化活性。结果表明，在乙醇溶剂中制备的ZnIn 2S 4在可见光（λ>420 nm）照射2 h时，转化率沿着升高，选择性>99%，而在水溶剂中制备的ZnIn 2S 4转化率和产率仅为58%和57%。提出并讨论了ZnIn 2S 4光催化选择氧化苯甲醇的可能机理。
Hexagonal ZnIn2S4samples have been synthesized by a solvothermal method. Their properties have been determined by X-ray diffraction, ultraviolet–visible-light diffuse reflectance spectra, field emission scanning electron microscopy, nitrogen adsorption–desorption and X-ray photoelectron spectra. These results demonstrate that ethanol solvent has significant influence on the morphology, optical and electronic nature for such marigold-like ZnIn2S4microspheres. The visible light photocatalytic activities of the ZnIn2S4have been evaluated by selective oxidation of benzyl alcohol to benzaldehyde using molecular oxygen as oxidant. The results show that 100% conversion along with >99% selectivity are reached over ZnIn2S4prepared in ethanol solvent under visible light irradiation (λ>420 nm) of 2 h, but only 58% conversion and 57% yield are reached over ZnIn2S4prepared in aqueous solvent. A possible mechanism of the high photocatalytic activity for selective oxidation of benzyl alcohol over ZnIn2S4is proposed and discussed.