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首页> 外文期刊>RSC Advances >Controlled fabrication of hierarchical WO3 center dot H2O hollow microspheres for enhanced visible light photocatalysis
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Controlled fabrication of hierarchical WO3 center dot H2O hollow microspheres for enhanced visible light photocatalysis

机译：受控的WO3中心点H2O空心微球分层制备以增强可见光光催化作用

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摘要

WO3 center dot H2O nanostructures have been prepared through a facile hydrothermal route by controlling their morphology during synthesis. WO3 center dot H2O nanoplates with a thickness of similar to 45 nm and hierarchical hollow microspheres (HMSs) structures could be obtained by introducing different amounts of citric acid. X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM) were employed to understand the structure and morphology of the two types of WO3 center dot H2O. The formation mechanisms for WO3 center dot H2O nanoplates and WO3 center dot H2O HMSs were investigated. The photocatalytic activities, determined by rhodamine B (RhB) degradation under visible light irradiation of WO3 center dot H2O HMSs photocatalysts, were significantly improved as compared with WO3 center dot H2O nanoplates. The higher efficiency of photocatalytic activity in WO3 center dot H2O HMSs was attributed to its higher surface-to-volume ratio and stability against aggregation. In addition, we investigated the toxicity of WO3 center dot H2O HMSs against an important model fungus, yeast (Saccharomyces cerevisiae). The results indicate that the as-synthesized hierarchical WO3 center dot H2O HMSs could be used as a green and efficient photocatalyst.
机译：WO3中心点H2O纳米结构已通过控制合成过程中的形貌，通过一条便捷的水热途径制备。可以通过引入不同量的柠檬酸获得厚度类似于45 nm的WO3中心点H2O纳米板和分层的中空微球（HMS）结构。通过X射线衍射（XRD），扫描电子显微镜（SEM）和透射电子显微镜（TEM）了解两种WO3中心点H2O的结构和形态。研究了WO3中心点H2O纳米板和WO3中心点H2O HMS的形成机理。与WO3中心点H2O纳米板相比，由可见光照射下WO3中心点H2O HMSs光催化剂在若丹明B（RhB）降解下确定的光催化活性得到了显着提高。 WO3中心点H2O HMS中较高的光催化活性效率归因于其较高的表面体积比和抗聚集稳定性。此外，我们调查了WO3中心点H2O HMS对重要的模型真菌酵母（Saccharomyces cerevisiae）的毒性。结果表明，合成后的分层WO3中心点H2O HMS可以用作绿色高效的光催化剂。

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