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首页> 外文期刊>Physical chemistry chemical physics: PCCP >Fabrication of CdMoO4@CdS core-shell hollow superstructures as high performance visible-light driven photocatalysts
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Fabrication of CdMoO4@CdS core-shell hollow superstructures as high performance visible-light driven photocatalysts

机译：CdMoO4 @ CdS核壳空心上部结构的制备，作为高性能可见光驱动的光催化剂

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CdMoO4@CdS core-shell hollow microspheres with the diameter of 2-3 mm were synthesized through a simple ion exchange hydrothermal method by using CdMoO4 solid microspheres as the sacrificial template in the presence of thioacetamide (TAA). Based on the detailed investigation it was found that the concentration of TAA in the starting solution affects the size of the CdS nanosheets and the hollowing process. At the TAA concentration of 0.1 M, CdMoO4@CdS core-shell hollow spheres with a CdS nanosheet thickness of 50-100 nm were obtained. The formed CdS nanosheets have a hexagonal wurtzite structure and exhibit good size uniformity and regularity. Furthermore, the photocatalytic activity of the as-prepared samples was evaluated towards degradation of Rhodomine B (RhB) aqueous dye solution under visible-light. Compared to CdMoO4 microspheres, CdMoO4@CdS core-shell hollow microspheres show enhanced photocatalytic activity. The observed photocatalytic performance was attributed to the synergetic effects of composite morphology, pore structure, and exposed two-dimensional (2D) CdS nanosheets with dominant 001 facets in CdMoO4@CdS core-shell hollow microspheres. Furthermore, the growth mechanism of CdMoO4@CdS hollow microspheres was discussed in detail.
机译：通过简单的离子交换水热法，以CdMoO4固体微球为牺牲模板，在硫代乙酰胺（TAA）存在下，合成了直径为2-3mm的CdMoO4 @ CdS核壳空心微球。根据详细的研究，发现起始溶液中TAA的浓度会影响CdS纳米片的尺寸和中空工艺。在TAA浓度为0.1 M时，获得CdS纳米片厚度为50-100 nm的CdMoO4 @ CdS核壳空心球。形成的CdS纳米片具有六方纤锌矿结构，并具有良好的尺寸均匀性和规则性。此外，评估了所制备样品在可见光下对若丹明B（RhB）染料水溶液降解的光催化活性。与CdMoO4微球相比，CdMoO4 @ CdS核壳空心微球显示出增强的光催化活性。观察到的光催化性能归因于CdMoO4 @ CdS核-壳空心微球中复合形态，孔结构和暴露的二维（2D）CdS纳米片（占优势的001面）的协同效应。此外，还详细讨论了CdMoO4 @ CdS中空微球的生长机理。

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