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Hydrothermal fabrication and characterization of novel CeO 2 /PbWO 4 nanocomposite for enhanced visible-light photocatalytic performance
Applied Water Science ( IF 5.5 ) Pub Date : 2021-05-22 , DOI: 10.1007/s13201-021-01429-x
S. Selvi , Ranjith Rajendran , N. Jayamani

In this revision, a series of novel visible-light-driven (VLD) CeO2/PbWO4 nanocomposites (NCs) were effectively fabricated by facile hydrothermal preparation way. The UV–Vis absorption spectra exposed that CeO2 NPs prolonged the adsorption edge of the CeO2/PbWO4 composite to the extensive visible region, which allied to decreases of the bandgap. As-prepared CeO2/PbWO4 NCs revealed superior photocatalytic action under visible-light and could degrade the Methylene Blue (MB) dye solution in 140 min. The photodegradation efficacy of CeO2/PbWO4 NCs was improved catalytic activity, which is around 1.45 and 2.7 times that of CeO2 and PbWO4 nanoparticles (NPs) individually. Besides, the CeO2/PbWO4 catalysts display notable stability and reusability performance in four succeeding cycles. The development in the photocatalytic enactment of combined CeO2/PbWO4 nanocomposite could be recognized not only to the sturdy visible-light absorption responses and separating the photoexcited electron–hole pairs. Also, the plausibly systematic illumination of charge transference and exploitation of reactive species for superior photocatalytic action in visible-light have been discussed. It is projected that the CeO2/PbWO4 NCs could be used as effective photocatalysts for promising applications for environmental wastewater refinement.



中文翻译:

新型CeO 2 / PbWO 4纳米复合材料的水热制备和表征,以增强可见光的光催化性能

在该修订版中,通过简便的水热制备方法有效地制备了一系列新型的可见光驱动(VLD)CeO 2 / PbWO 4纳米复合材料。UV-Vis吸收光谱表明,CeO 2 NPs将CeO 2 / PbWO 4复合材料的吸附边缘延长至宽的可见光区域,从而减少了带隙。制备的CeO 2 / PbWO 4 NCs在可见光下显示出优异的光催化作用,并且可以在140分钟内降解亚甲基蓝(MB)染料溶液。CeO 2 / PbWO 4的光降解效率NCs提高了催化活性,分别约为CeO 2和PbWO 4纳米颗粒(NPs)的1.45和2.7倍。此外,CeO 2 / PbWO 4催化剂在四个连续循环中均显示出显着的稳定性和可重复使用性。CeO 2 / PbWO 4纳米复合材料在光催化作用上的发展不仅可以识别出坚固的可见光吸收响应,而且可以分离出光激发的电子-空穴对。同样,已经讨论了可能的电荷转移的系统照明和反应性物质的开发,以在可见光中具有优异的光催化作用。预计CeO 2/ PbWO 4 NCs可以用作有效的光催化剂,用于环境废水提纯的有前途的应用。

更新日期:2021-05-22
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