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Template-free fabrication of CdMoO4 hollow spheres and their morphology-dependent photocatalytic property

机译：CdMoO4空心球的无模板制备及其依赖形态的光催化性能

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摘要

The controllable synthesis of CdMoO4 hollow microspheres has been successfully realized in a large scale by a facile precipitation reaction between Cd(CH3COO)(2) and Na2MoO4 in the absence of any templates or additives. The as-prepared hollow spheres consist of small nanoparticles with a size of ca. 100 nm. By adjusting the reaction condition, hollow spheres with different morphologies and microstructures could be obtained. The growth mechanism was investigated on the basis of the results of time-dependent experiments. The band gap estimated from the main absorption edges of the UV-vis diffuse reflectance spectrum is 3.31 eV. The photocatalytic activity experiment indicated that the CdMoO4 hollow microspheres prepared at 40 degrees C exhibited a higher photocatalytic activity in the photocatalytic decolorization of Rhodamine-B aqueous solution under the UV light illumination than commercially available TiO2. Notably, the photocatalytic property of CdMoO4 samples is strongly dependent on their morphologies and microstructures. The present work might afford some guidance for the rationally controllable synthesis of other photocatalytic materials and the as-grown architectures show good application potential.
机译：在没有任何模板或添加剂的情况下，Cd（CH3COO）（2）与Na2MoO4之间的快速沉淀反应已成功地大规模实现了CdMoO4中空微球的可控合成。所制备的空心球由尺寸约为1的小纳米颗粒组成。 100纳米通过调节反应条件，可以获得具有不同形貌和微观结构的空心球。根据时间依赖性实验结果研究了其生长机理。从紫外可见漫反射光谱的主要吸收边缘估计的带隙为3.31 eV。光催化活性实验表明，在40℃下制备的CdMoO4中空微球在若丹明B水溶液的紫外光光催化脱色中比市售TiO2表现出更高的光催化活性。值得注意的是，CdMoO4样品的光催化性能在很大程度上取决于其形态和微观结构。目前的工作可能为其他光催化材料的合理可控合成提供一些指导，并且所生长的体系结构显示出良好的应用潜力。

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